AXP209

The AXP209 is the PMU (Power Management Unit) used by A10 and A13 SoCs and developed by X-Powers Ltd, a sister company of Allwinner Tech.

GPIO
The AXP209 has 4 GPIOs which can be addressed from script.bin files as port:powerN (N in [0..3]).

Spec Sheet






Enhanced single Cell Li-Battery and Power System Management IC AXP209

Overview
AXP209 management chip is a highly integrated power system for single-cell lithium battery (lithium-ion or lithium polymer) and require multiple power conversion Application of the output can be flexibly configured to provide easy-to-use and complete power solutions fully meet the increasingly complex application processing. Precise control requirements of the control system for the power supply.

AXP209 integrates an adaptive USB-Compatible the PWM charger, 2-way step-down converter (Buck DC-DC converter), 5-channel linear regulator device (LDO) voltage / current / temperature multi-channel 12-Bit ADC, 4 configurable GPIO. Sustaining Card power system security the stable, AXP209 integrated over / under voltage (OVP / UVP), over temperature (OTP), overcurrent protection (OCP) circuit.

Wisdom energy balance in AXP209 (Intelligent Power Select, IPS ™) circuit in the USB and external AC adapter, lithium battery Safe and transparent distribution of electric energy between the pool and the application of the system load and the only external input power without batteries (or battery over discharge / damage) Can also be the case so that the application of the system to work properly.

AXP209 external adapter and USB and battery capacity of three-input, support rechargeable backup battery. AXP209 provides a two-wire serial communication interface: Two Wire Serial the Interface (TWSI), application processor through the pick Mouth open or shut down some of the power output, set the voltage, the access to the internal registers and a variety of measurement data (including Fuel Gauge). High Accuracy (1%, mainly decided by the the BIAS resistor 1% accuracy) power measurement data to facilitate consumers more clearly the real-time power usage like Conditions, giving consumers an unprecedented level of equipment energy use experience.

AXP209 6mm x 6mm 48-pin QFN package.

Applications

 * Handheld mobile devices
 * Smart mobile phone, PMP/MP4, the number of
 * Digital camera, a digital camera, a handheld guide
 * Navigational GPS, PDA, handheld digital
 * Radio and television receivers
 * Mobile Internet Devices xPad, MID
 * Digital photo frames, portable DVD player,
 * Ultra mobile PC UMPC and
 * UMPC-like, learning machine
 * Application processor circuit system
 * Application Processor systems
 * Other battery and power applications

Features
• Power Management (IPS) o Wide input voltage range: 2.9V6.3V (AMR:-0.3V11V) o Configurable efficient wisdom energy balance "IPS ™" system o the adaptive USB (support USB3.0)or AC adapter Pressure limiting current limit (4.4V/900mA/500mA/100mA) o battery path equivalent resistance of less than 75mΩ • Fully integrated PWM charger (PWM Charger) o maximum charging current of up to 1.8A o support the battery temperature monitoring o Full support for USB charging (including 3.0) compliant Claim o charging high precision, an error of less than 0.5% o support 4.1V/4.15V/4.2V/4.36V other battery o Automatic charging process control o can directly drive LEDs indicate the charging status o charging current is adjusted automatically according to the load on the system • battery backup (Backup Battery) o acceptable backup battery input supply RTC module o support for charging a spare battery charging current can be set • 2-channel synchronous buck converter (DC-DC) o DC-DC2: can be adjusted between 0.7-2.275V 25mV/step, drive capability 1.6A, support VRC o DC-DC3: can be adjusted between 0.7-3.5V, 25mV/step, drive capacity 1.2A • 5 linear regulators (LDO) o LDO1: 30mA, always effective the o LDO2: low noise LDO, 1.8V3.3V adjustable 100mV/step, drive capability of 200mA o LDO3 :0.7-3 .5 V adjustable, 25mV/step, flooding Dynamic capacity 200mA the o LDO4: low noise LDO, 1.8V3.3V adjustable 100mV/step, drive capability of 200mA o LDO5: low-noise LDO, 1.8-3.3V adjustable 100mV/step, drive capability 50mA • Timer (Timer) o 7bit Timer, Timing Range 1127 minutes o Timer interrupt output Note: VRC, Voltage Ramp Control voltage ramp Rate control. • signal acquisition system (Signal Capture) o Built-in 12 Bit ADC, 12-way o accept two additional external signal input number of current and voltage o battery and external input power According to o Built-in high-precision Coulomb Counter and Fuelgauge of system o Provide rich power management information, such as instantaneous power consumption (MA or mW), and the remaining battery capacity (% or mAh) The state of charge (%) and the remaining battery time or charge Electric time o two low-battery warning and protection o provide chip temperature data • Application Processor Interface (Host Interface) o Host by TWSI interface for data exchange o interrupt can be flexibly configured and Sleep Management o flexible pin feature set, multiple GPIO respectively IO, ADC functions o Built-in configurable timer o provide 12 sets of registers can be used for system shutdown Data is saved • System Management (System Management) o support soft reset and hard reset o Support soft-off and hard shutdown o Support for external trigger source wake o support the output voltage monitoring, self-diagnostic function o output PWROK, the used for system reset or shutdown instructions o external power detection (insert / remove / drive capacity) o All input and output support soft-start o over / under-voltage protection (OVP / UVP) o overcurrent protection (OCP) o overtemperature protection (OTP) o Support OTG VBUS power state setting / monitoring • High integration (Fully Integration) o Internal precision reference voltage (0.5%) o Built-in MOSFET o timing and the output voltage can be customized • decryption module (Decryption) o 128bit OTP password storage o dynamic real-time decryption algorithm

Absolute Maximum Ratings
Symbol Description Value Units ACIN Input Voltage Input Voltage -0.3 To 11 V VBUS Input Voltage Input Voltage -0.3 To 11 V T J Operating Temperature Range Operating Temperature -40 To 130 ℃ Ts Storage Temperature Range Storage Temperature -40 To 150 ℃ T LEAD Maximum Soldering Temperature (at leads, 10sec) Soldering temperature 300 ℃ V ESD Maximum ESD stress voltage, Human Body Model Antistatic ability > 4000 V P D Internal Power Dissipation Internal power consumption tolerance 2100 mW 5. Electrical Characteristics (Electrical Characteristics) V IN = 5V, BAT = 3.8V, T A = 25 ℃ SYMBOL DESCRIPTION CONDITIONS MIN TYP MAX UNITS ACIN V IN ACIN Input Voltage 3.8 6.3 V I OUT V OUT Current Available Before Loading BAT 500mV Voltage Drop 2500 mA V UVLO ACIN Under Voltage Lockout 3.8 V V OUT IPS Output Voltage 2.9 5.0 V R ACIN Internal Ideal Diode On Resistance PIN to PIN, ACIN to IPSOUT 170 mΩ VBUS V IN VBUS Input Voltage 3.8 6.3 V I OUT V OUT Current Available Before Loading BAT 500 900 mA V UVLO VBUS Under Voltage Lockout 3.8 V V OUT IPS Output Voltage 2.9 5.0 V R VBUS Internal Ideal Diode On Resistance PIN to PIN, VBUS to IPSOUT 300 mΩ Battery Charger V TRGT BAT Charge Target Voltage -0.5% 4.2 +0.5% V I CHRG Charge Current 1200 1800 mA I TRKL Trickle Charge Current 10% I CHRG

AXP209 mA V TRKL Trickle Charge Threshold Voltage 3.0 V ΔV RECHG Recharge Battery Threshold Voltage Threshold Voltage Relative to V TARGET -100 mV T TIMER1 Charger Safety Timer Termination Time Trickle Mode 40 Min T TIMER2 Charger Safety Timer Termination Time CC Mode 480 Min I END End of Charge Indication Current Ratio CV Mode 10% 15% I CHRG mA Backup Battery V TRGT Backup Battery Charge Target Voltage 2.5 3.0 3.1 V I CHRG Backup Battery Charge Current 50 200 400 uA I Backup Current when use Backup Battery 10 15 uA NTC Charge 2.112 V TL Cold Temperature Fault Threshold Voltage Discharge 0 3.226 3.264 V Charge 0.397 V TH Hot Temperature Fault Threshold Voltage Discharge 0 0.282 3.264 V V TE NTC Disable Threshold Voltage Falling Threshold Hysteresis 0.2 V Ideal Diode R ds (on) On Resistance (BAT to IPSOUT) 75 mΩ SYMBOL DESCRIPTION CONDITIONS MIN TYP MAX UNITS Off Mode Current I BATOFF OFF Mode Current BAT = 3.8V 27 μA I SUSPEND USB VBUS suspend Mode current BAT = 3.8V, VBUS = 5V, N_VBUSEN ​​= 1 86 μA Logic V IL Logic Low Input Voltage 0.3 V V IH Logic High Input Voltage 2 V TWSI V CC Input Supply Voltage 3.3 V ADDRESS TWSI Address 0x68 f SCK Clock Operating Frequency 400 1200 kHZ t f Clock Data Fall Time 2.2Kohm Pull High 60 ns VQ.QW WPPIQPWE CC Confidential Page 8/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 t r Clock Data Rise Time 2.2Kohm Pull High 100 ns DCDC f OSC Oscillator Frequency Default 1.5 MHz DCDC2 I LIM2 PMOS Switch Current Limit PWM Mode 2300 mA I DC2OUT Available Output Current PWM Mode 1800 mA V DC2OUT Output Voltage Range 0.7 2.275 V DCDC3 I LIM3 PMOS Switch Current Limit PWM Mode 1400 mA I DC3OUT Available Output Current PWM Mode 1000 mA V DC3OUT Output Voltage Range 0.7 3.5 V SYMBOL DESCRIPTION CONDITIONS MIN TYP MAX UNITS LDO1 V LDO1 Output Voltage I LDO1 = 1mA -1% 1.3 3.3 1% V I LDO1 Output Current 30 mA LDO2 V LDO2 Output Voltage I LDO2 = 1mA 1.8 3.3 V I LDO2 Output Current 200 mA PSRR Power Supply Rejection Ratio I LDO2 = 60mA, 1KHz TBD dB e N Output Noise ,20-80KHz Vo = 3V, Io = 150mA 28 μV RMS LDO3 V LDO3 Output Voltage I LDO3 = 1mA 0.7 3.5 V I LDO3 Output Current 200 mA PSRR Power Supply Rejection Ratio I LDO3 = 10mA, 1KHz TBD dB e N Output Noise ,20-80KHz Vo = 1.8V, Io = 150mA TBD μV RMS LDO4 V LDO3 Output Voltage I LDO3 = 1mA 1.8 3.3 V I LDO3 Output Current 200 mA PSRR Power Supply Rejection Ratio I LDO3 = 10mA, 1KHz TBD dB e N Output Noise ,20-80KHz Vo = 1.8V, Io = 150mA 18 μV RMS LDO5 V LDO5 Output Voltage I LDO5 = 1mA 1.5 3.3 V I LDO5 Output Current 50 mA PSRR Power Supply Rejection Ratio I LDO5 = 10mA, 1KHz TBD dB e N Output Noise ,20-80KHz Vo = 1.8V, Io = 30mA 18 μV RMS

Typical Characteristics
DC-DC Efficiency vs. Load (3.8Vin) DC-DC Load Transient (Typical) DC-DC Ripple V REF vs Temperature V TRGT vs Temperature Off Mode Current vs V BAT

Pin Description)
Num Name Type Condition Function Description 1 SDA IO Data pin for serial interface, normally it connect a 2.2K resistor to 3.3VI / O power 2 SCK I it is the Clock pin for serial interface, normally it connect a 2.2K resistor to 3.3VI / O power 3 GPIO3 IO REG9EH [7] GPIO 3 4 N_OE I Power output on / off switch GND: on; IPSOUT: off 5 GPIO2 IO REG92H [2:0] GPIO 2 6 N_VBUSEN I VBUS to IPSOUT Selection GND: IPSOUT select VBUS High: IPSOUT do not select VBUS 7 VIN2 PI DCDC2 input source 8 LX2 IO Inductor Pin for DCDC2 9 PGND2 G NMOS Ground for DCDC2 10 DCDC2 I DC-DC2 feedback pin 11 LDO4 O Output Pin of LDO4 12 LDO2 O Output Pin of LDO2 VQ.QW WPPIQPWE CC Confidential Page 13/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 13 LDO24IN PI Input to LDO2 and LDO4 14 VIN3 PI DCDC3 input source 15 LX3 IO Inductor Pin for DCDC3 16 PGND3 G NMOS GND for DCDC3 17 DCDC3 I Feed back to DCDC3 GPIO 1 18 GPIO1 IO REG93H [2:0] ADC Input GPIO 0 Low noise LDO / Switch 19 GPIO0 IO REG90H [2:0] ADC Input 20 EXTEN O External Power Enable 21 APS PI Internal Power Input 22 AGND G Analog Ground 23 BIAS IO External 200Kohm 1% resistor 24 VREF O Internal reference voltage 25 PWROK O Power Good Indication OutPut 26 VINT PO Internal logic power, 2.5V 27 LDO1SET I It set the LDO1 default voltage. 28 LDO1 O LDO1 output, for Host RTC block 29 DC3SET I It set the DCDC3 default voltage 30 BACKUP IO Backup battery pin 31 VBUS PI USB VBUS input 32,33 ACIN PI Adapter input 34,35 IPSOUT IO Main Battery 36 CHGLED O charger status indication 37 TS I Battery Temperature sensor input or an external ADC input 38,39 BAT PO System power source 40 LDO3IN O LDO3 input source 41 LDO3 I Output Pin of LDO3 42 BATSENSE I Current sense port1 43 CHSENSE O Current sense port2 44 VIN1 PI DCDC1 input source 45 LX1 IO Inductor Pin for DCDC1 46 PGND1 G NMOS Ground for DCDC1 47 PWRON I Power On-Off key input, Internal 100k pull high to APS 48 IRQ / WAKEUP IO IRQ output or wakeup 49 EP G Exposed Pad, need to connect to system ground VQ.QW WPPIQPWE CC Confidential Page 14/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 8. Functional Block Diagram (Functional Block Diagram) BAT Bat Temperature Monitor Output voltage monitor / LBO LDO2 DC-DC3 DC-DC2 Serial Interface LDO4 IPS IRQ SCK SDA VBUS IPSOUT APS Control Logic PWRON GPIO3 GPIO1 GPIO0/LDOio0 GPIO2 DC3SET PWROK AGND EP BATSENSE LDO1 LDO1SET Reference Voltage TS N_VBUSEN ACIN Register CHGLED BIAS CHSENSE 12 bit ADC Current Monitor Voltage Monitor Temperature Monitor LDO2 LDO4 LDO1 LX2 DCDC2 PGND2 VIN2 LX3 DCDC3 PGND3 VIN3 VREF BACKUP LDO24IN VINT N_OE PWM Charger LX1 PGND1 VIN1 LDO3 LDO3 EXTEN LDO3IN VQ.QW WPPIQPWE CC Confidential Page 15/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 9. Control and operation (Control and Operating) When AXP209 work the, TWSI interface SCK / SDA pin pulled system IO power, the Host through this interface AXP209 The working status of the flexible adjustment and monitoring, and a wealth of information can be obtained. Note: "Host" refers to the application system's main processor. Note: as "external power" referred to contain the ACIN and VBUS input. 9.1 work mode and reset (Power On / Off & Reset) Keys (PEK) AXP209 PWRON pin can be connected between the GND of a button, as a separate switch key Power Enable Key (PEK) Or sleep / wake button. AXP209 can automatically identify the key "long" and "short" and react accordingly. Several boot source (Power on Source) 1, ACIN, VBUS and battery access. 2, N_OE from high to low. 3, PEK. Boot (Power On) N_OE is low, when the meet the requirements of the main power supply (ACIN or VBUS> 3.8V, the battery voltage is higher than the off voltage) access, AXP209 Whether the automatic boot automatically boot (external power access can be rewritten according to external demand). N_OE low and turned off the boot action through PEK operation to complete. In the case of an external power supply or battery, N_OE low changes will cause AXP209 boot. Can by PEK (AXP209 key time over "ONLEVEL") boot. In practical applications, the output signal of the timing of the Host (Alarm) Number can also be connected to PWRON-PEK parallel, Alarm signal is active (low), equivalent to the PEK press, can also be AXP209 Boot. After the completion of the power, DC-DC and LDO will be in accordance with the timing set sequential soft-start, start by the Host by TWSI Open / Close Corresponding power. Shutdown (Power Off) PEK "long time is greater than IRQLEVEL in PEK interrupt service routine, Host will" register REG32H [7] Write "1" to notify AXP209 enter the off state. AXP209 turn off all power except LDO1, output will enter the off state. , AXP209 will automatically shut down in the following cases: 1, the input voltage is too low, low electrical protection; 2, the load is too large causing the power supply output voltage is too low, overload protection; VQ.QW WPPIQPWE CC Confidential Page 16/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 3, the input voltage is too high, the overvoltage protection (as detailed in the "power path management section); 4, N_OE from low to high, waiting for more than a set time (default 2S); 5, PEK time greater than OFFLEVEL (default 6S) the System automatically turn off the other output (can be omitted Reset button) except LDO1; Automatic protection mechanism in AXP209 avoid application system disorders occur when the irreversible damage of the device is powered, so as to protect the entire Systems. Sleep and wake (Sleep and wakeup) In the case of the boot, if the system needs to enter the Sleep mode, and a road or power output shut down or change to other Voltage can REG31H [3] control, decide whether PEK key signal, GPIO0, GPIO1, GPIO2 GPIO3 rise Falling edge (As for the rising or falling edge or double-edge, by REG90H [7:6], REG92H [7:6], REG93H [7:6], and REG95H [7:6] setting) triggered wakeup, PMU outputs to the power supply voltage is restored to its default state, the brightest are shut down or change the electrical Source in accordance with the provisions of the power-on timing in turn re-open. Note: PEK IRQ (REG42H [1]), GPIO0 is the INPUT Edge IRQ (REG44H [0]), the GPIO1 the INPUT Edge the IRQ (REG44H [1]), GPIO2 INPUT Edge IRQ (REG44H [2]), GPIO3 INPUT Edge IRQ (REG44H [3]) must be Enable, in order to inform the host processor through the IRQ PIN exit Sleep state. Follows for Sleep and wakeup mode control flow. REG31H [3] write 1 Open the wake-up function, PMU record the REG12H settings Shutdown corresponding power or Regulating voltage Sleep and wait Wakeup occurs Wakeup? Power is restored to the default Output voltage values Y N VQ.QW WPPIQPWE CC Confidential Page 17/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 System reset function and output monitoring function (PWROK) AXP209 the PWROK can be used as a reset signal for the application system. In the boot process AXP209, PWROK output low Reaches the preset value when the output voltage of each power supply stability, PWROK is pulled up, the application of the system in order to achieve power-on reset. Application system during normal operation, AXP209 been monitoring the the brightest output voltage and load conditions, and overload or undervoltage In the case of pressure, PWROK immediately output low, the application system is reset to prevent malfunction and possible data error. 9.2 power path management (IPS) The the power input of AXP209 can from the lithium battery BAT for USB VBUS input, external power supply ACIN (such as the AC adapter AC Adapter), IPS according to the state of the external power supply and a lithium battery to select a suitable power distribution. o When only access the lithium battery, no external power supply input, using the lithium battery-powered; o When you access an external power supply (VBUS or ACIN), priority in the use of an external power supply; o battery connection the case, when the external power supply is removed immediately "seamless" turn powered by lithium batteries; o When the VBUS and ACIN both simultaneously access priority ACIN powered and rechargeable Li-ion battery; o If the ACIN driving ability is not enough, it will open the VBUS pathway timely, ACIN / VBUS common power supply; o If the drive capacity is still insufficient, it will reduce the charge current until 0, then supplement with battery-powered; The compatibility of the input power can thus greatly enhance the system for different external drive capability, without the manufacturers provide special custom adapter. See the following icons: As shown above, the when ACIN load capacity is insufficient, IPSOUT voltage decreased BAT from charging into the discharge with ACIN Together with the load current. VQ.QW WPPIQPWE CC Confidential Page 18/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 The Host can through TWSI access the internal register of AXP209 to set the parameters of the IPS and read their feedback. Limited voltage / current limiting mode and direct mode In order not to affect the USB communication VBUS pathway default in the the VBUS voltage limiter mode ". In this mode, AXP209 will VBUS The voltage is maintained at a set reference voltage V HOLD Above, in order to meet the USB specification. V HOLD Default is 4.4V, is available in register Reg30H [5:3] to adjust. If the system limit demand, the size of the current drawn from the USB VBUS provides a current limiting modes to choose from (see register REG30H [1]), the current limit optional 900mA/500mA/100mA (register Reg30H [0]). If the system is USB powered and do not mind USB communication, or using a USB power adapter, you can modify the register REG30H [6] AXP209 set VBUS through mode ", this time AXP209 priority to meet the electricity needs of the application system. When the USB Host drive capacity is too weak or the system power consumption is too strong and the VBUS voltage is below V HOLD , AXP209 will issue an IRQ inform Host VBUS The power supply capacity is weak, indicating the USB communication may be affected by the decision of the follow-up action by the Host software. The reaction of AXP209 external power supply into AXP209 can automatically detect the insertion operation of the external power supply. When will automatically determine the external electric AXP209 detected after the external power supply into Source is available, and the results are provided in the corresponding register, also issued IRQ, notifying the Host. Register status bit on the external power supply and their meanings are shown in the following table: The status bits of the register Meaning Register REG00H [7] Indicates external adapter power ACIN Register REG00H [6] The ACIN is available indicates that the external adapter power Register REG00H [5] Indicates external power supply VBUS Register REG00H [4] Indicates that the external power supply VBUS availability Register REG00H [3] The instructions access external power supply VBUS VBUS voltage is above V HOLD Register REG00H [1] Indicates that the external power supply ACIN / the VBUS is whether in the short-circuit on the PCB Register REG00H [0] Indicate whether the system is triggered by the ACIN / VBUS boot Instructions access an external power supply VBUS VBUS voltage is higher than V HOLD "This flag allows the Host to the receipt of IRQ7 When (referring to the VBUS power supply capacity is weak), judge VBUS pulled low because the load on the system access or external power voltage is lower than the V HOLD Host software, making it easy to decide is to continue working in the pressure-limiting mode or changed to pass-through mode. The choice of whether the VBUS as an input power AXP209 whether selection VBUS input power will be N_VBUSEN ​​and register REG30H [7] to decide: N_VBUSEN REG30H [7] Input power Meaning Low 0 VBUS VBUS valid ACIN selection Low 1 VBUS The VBUS valid when VBUS as input power VQ.QW WPPIQPWE CC Confidential Page 19/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 High 1 VBUS High 0 ACIN / BAT Not to use VBUS Low-battery warning, and low power protection (automatic shutdown) AXP209 can set the low-battery warning voltage V WARNING And automatic shutdown voltage V OFF And system power their comparison. Once found System power is lower than V WARNING , On the issue IRQ19/IRQ20. If APS is lower than V OFF , AXP209 automatically enters shutdown mode, turn off The output all except LDO1. V WARNING Two tranches set: LEVEL1/LEVEL2 application for the two tranches of alarm definitions different tips, such as Level1 For suggesting that lack of electricity, Level2 prompted the impending shutdown. V WARNING And V OFF The default values ​​in the register REG3AH REG3BH REG31H [2:0] settings. Overvoltage protection When the external power supply voltage exceeds 6.3V, AXP209 issue IRQ1 / 4, prompting an external power supply overvoltage. When an external power supply more than 7V, AXP209 Automatic shutdown. 9.3 Adaptive PWM charger (Adaptive PWM Charger) AXP209 integrated a constant current / constant voltage PWM charger can automatically control the charging cycle, the built-in security clock can automatically stop Stop charging without processor intervention. This charger can be based on the power consumption of the system automatically adjusts the charging current, and also with battery detection Trickle Charging and activate the function, built-in temperature detection circuit can automatically reduce the charge current when the temperature is too high or too low. The integration of the PWM charger system power consumption and battery fast charging, relatively traditional linear charger module Greatly improved efficiency, thereby reducing energy consumption, system temperature rise be greatly improved. Adaptive charging process start Charger default is enable the state to shut down (by setting register see "register REG33H). When external power access After, AXP209 first determine whether the external power supply can be used for charging, when subject to the conditions of the external power is available, and the charging function is turned on, The AXP209 automatically start the charging process, the IRQ issue to Host the beginning of the charging process. CHGLED pin output low, Can drive external LEDs indicate the charging status. Charging process voltage and current diagram VQ.QW WPPIQPWE CC Confidential Page 20/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 I TRKL V TRKL I CHRG V TRGT Two flags voltage V TRGT, Charging target voltage. V TRGT By register settings, the default is 4.2V (see "Register REG33H [6:5]"). At the same time, In the external power supply voltage is low, AXP209 will automatically adjust the the charging target voltage. V RCH Automatically re-charging voltage. V RCH = V TRGT -0.1V. Charging current The charging current can register REG33H [3:0] settings, the default value is 500mA or 1200mA. Charging process If the battery voltage is lower than 3.0V, the charger automatically enters precharge mode, the charging current to the default value of 1/10. If within 40 minutes (this A time to adjust, see "the register REG34H), the battery voltage is still not reached 3.0V, the charger automatically enters battery activation patterns. The specific details see "battery active mode. Once the battery voltage is higher than 3.0V, the charger into the constant current mode. If the charging current is less than 65% of the default, the system sends IRQ17 this notification external power drive capability, the charging current does not reach the set value, which will extend the charging time, if you want to Faster fully charged, it is recommended to replace the stronger power or turn off the power consumption function. When the battery voltage reaches the target voltage V TRGT From the constant current mode, the charger enters the constant charge current decreases. The end of the charge cycle when the charge current is less than the default value of 10% or 15% (can be set, see "registers REG33H"), charging stop Ended, when charging is completed, AXP209 will issue IRQ18, CHGLED pin stop indicates the charging status. When the battery voltage drops below the lower V RCH Will start automatically recharge while issuing IRQ17. VQ.QW WPPIQPWE CC Confidential Page 21/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 In the non-pre-charging mode, if at 480 minutes (this time can be adjusted, see "register REG34H), the charging cycle did End, the battery charger will automatically enter active mode. Battery activation patterns, AXP209 will be issued from either the pre-charging mode or from entering the battery from the constant current charging mode activation mode (timer timeout case) IRQ10, indicates that the battery may be damaged. Activated in the battery mode, Charger always smaller current to charge the battery, if the battery voltage reaches V RCH , Exit Active mode, also issued IRQ11. AXP209 in register REG01H indicate battery charger is in active mode. CHGLED Used to indicate charging status and alarm CHGLED pin, it has four states: is charging, not charging, battery abnormal alarm and external Supply overvoltage alarm. CHGLED NMOS Open Drain (open-drain type) output through a current limiting resistor to directly drive a The light emitting diodes to display the status of the four. Two methods of work but it has shown in the following table: REG34H [4] state Performance Note Charging low Not charging high impedance Battery abnormal 1Hz blinking charger into the battery activation patterns, or the battery temperature is too high, too low 0 Overvoltage 4Hz flashing external power supply input voltage is too high Charging 1Hz blinking Can not charge high impedance No external power supply Not charging low 1 Overvoltage 4Hz flashing external power supply input voltage is too high or the battery temperature is too high, too low Battery temperature detection In charge / process, AXP209 by a temperature-sensitive resistor in the TS pin external monitor battery temperature. Circuit schematic, such as The following figure: VQ.QW WPPIQPWE CC Confidential Page 22/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 NTC TS BAT C2 10uF GND In the figure above, VTH / VTL door for high temperature and low temperature limit set, respectively, through the register REG38H/39H/3CH/3DH settings VTE = 0.2V. Suggested that the temperature-sensitive resistor selected 25 ℃ 10Kohm, accuracy 1% NTC temperature sensitive resistor. AXP209 will be sent on the TS pin Constant current, this current can be set to 20uA, 40uA, 60uA, 80uA four (see register REG84H), in order to adapt to different NTC electric Resistance. This current flowing through the temperature-sensitive resistor to obtain a detection voltage, AXP209 ADC measured voltage value and to be compared with the set value, thereby Issue the corresponding IRQ or suspend charging. Temperature sensitive resistor is too large or too small, you can be in its path in parallel or in series on the extra resistance, in order to expand its detection range. If the battery does not have a temperature-sensitive resistor, the TS pin is connected to the ground, this time AXP209 automatically disable the battery temperature monitoring function. Battery detection The AXP209 will automatically detect whether the battery and identification in the register (see register REG01H), and issuing IRQ13 IRQ14. Battery detection by Host control to open or close the (see register REG32H). 9.4 battery backup (Backup Batttery) AXP209 support backup battery use and charging without mains (BAT / ACIN / VBUS) exist, LDO1 input source select an alternate Battery, and its output is used to maintain the system real-time clock circuit. When the main power is present, by setting REG35H [7] spare battery charging its target voltage defaults to 3.0V (by REG35H [6:5] is set), the default charging current of 200uA (also by REG35H [1:0] setting). VQ.QW WPPIQPWE CC Confidential Page 23/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 9.5 multi-channel power output (Multi-Power Outputs) Multiple output voltage AXP209 provider and the feature list is as follows: Output path Type Default voltage Application examples Drive capability DCDC2 BUCK Can be set 1.25Vcore 1600 mA DCDC3 BUCK Can be set 2.5Vddr 700 mA LDO1 LDO Can be set RTC 30 mA LDO2 LDO Can be set Analog / FM 200 mA LDO3 LDO Can be set 1.3V PLL 200 mA LDO4 LDO Can be set 1.8V HDMI 200 mA LDO5 LDO Can be set Vmic 50 mA AXP209 contains 2-channel synchronous buck DC-DC Road LDO, a variety of start timing and control. The operating frequency of the DC-DC Mo That 1.5MHz, by setting registers to adjust the peripheral use of small inductors and capacitive elements. Two DC-DC can be set Into PWM mode or automatic mode (by AXP209, automatic switching) based on the size of the load, see "register REG80H". DC-DC2 / 3 DCDC3 output voltage range of 0.7-3.5V, DCDC2 output voltage of 0.7-2.275V, by register settings (see "register REG23H 27H "). DCDC2 / 3 output capacitor recommended small ESR 10uF X7R ceramic capacitors; When the output voltage is set to 2.5V or more, pushing Recommended 2.2uH inductor 4.7uH inductor recommended below 2.5V, inductor saturation current need is greater than this maximum demand of power path Seeking for more than 50% of the current. The following is a list of recommended inductance and capacitance: Inductance Model Current specifications DC resistance Murata LQH55PN2R2NR0 2100mA@2.2uH 30mOhm Murata LQH55PN4R7NR0 1400mA@4.7uH 60mOhm Murata LQH44PN2R2MP0 2000mA@2.2uH 49mOhm Murata LQH44PN4R7MP0 1700mA@2.2uH 80mOhm TDK VLF5010ST-2R2M2R3 2700mA@2.2uH 41mOhm TDK VLF5014ST-4R7M1R7 1700mA@4.7uH 98mOhm TDK SLF6045T-4R7N2R4-3PF 2400mA@4.7uH 27mOhm Capacitance Model Temperature characteristics Tolerance TDK C2012X5R0J475K X5R/X7R 10% @ 4.7uF TDK C2012X5R0J106K X5R/X7R 10% @ 10uF Murata GRM31E71A475K X7R 10% @ 4.7uF Murata GRM21E71A106K X7R 10% @ 10uF Murata GRM31E71A106K X7R 10% @ 10uF VQ.QW WPPIQPWE CC Confidential Page 24/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 LDO1 LDO1 never open, can provide uninterrupted power supply for the application of the system's real-time clock (RTC) circuit, the drive capacity of 30mA. LDO2/3/4 LDO2 / 4 low output noise 18uVrms, the applications of analog circuits provide power. LDO3 systems such as SRAM Or PLL provides power. Drive capability of 200mA. LDO5 LDO5 using the design of low-noise output drive capacity of 50mA. Soft-start (Soft Start) Soft-start output DC-DC and LDO support the establishment of the way, to avoid the impact of the sudden change of the current input pathway startup. Self-diagnosis: load monitoring and limiting protection DC-DC and LDO load monitoring and limiting function, when the load current exceeds its drive capacity, the output voltage will Drop, in order to protect the internal circuit. Two DC-DC output voltage is lower than 85% of the set voltage, AXP209 automatic shutdown. Within the system at the same time Automatically records specific due to which output voltage is too low to cause a shutdown (see register REG46H [5:2]) and issued the corresponding IRQ. DC-DC does not require an external Schottky diode and resistor divider feedback circuit. If the application does not need to use a DC-DC Simply corresponding the LX pin floating can. 9.6 default voltage / start timing settings (Default Voltage / Timing Setting) AXP209 customizable default voltage of each power supply, start timing. Start timing: contains a total of eight start at the same time can be set for each step start time interval, optional for 1,4,16,32 mS. Default voltage setting: each way DCDC / LDO settable range includes a selection from the lowest to the highest voltage. LDO1SET PIN for setting an initial voltage of LDO1: LDO1SET LDO1SET ground LDO1SET then VINT LDO1 voltage 1.3V 3.3V DC3SET PIN is used to set the initial voltage of the DC-DC3: DC3SET DC3SET ground DC3SET then APS DC3SET floating The voltage of the DC-DC3 1.8V 3.3V/2.5V 1.2V/1.5V About the contents of this section, see "default configuration instructions" document. VQ.QW WPPIQPWE CC Confidential Page 25/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 9.7 Signal Acquisition System (Signal Capture) Battery monitor usually estimated by measuring the battery voltage to the battery charge, while 12Bit ADC, AXP209 multiple subject That can measure battery voltage, battery current and the external power supply voltage, the current can be measured, the internal integration of the battery charge and discharge library The Lun meter. Host can be based on these data a more accurate calculation of battery power, in addition, you can also calculate the system's real-time power consumption Remaining battery power, battery charging progress, remaining battery time remaining full time power supply information. The brightest ADC enable control and sampling speed can be set by register REG82H, 83H, 84H, and stored in the phase of the sampling results See the register description of the ADC data class should register. GPIO [1:0] input range can be set through the register REG85H. The direction of the battery current is charged or discharged by the the register REG00H [2] to indicate. Channel 000H STEP FFFH Battery Voltage 0mV 1.1mV 4.5045V Bat discharge current 0mA 0.5mA 4.095A Bat charge current 0mA 0.5mA 4.095A ACIN volatge 0mV 1.7mV 6.9615V ACIN current 0mA 0.625mA 2.5594A VBUS voltage 0mV 1.7mV 6.9615V VBUS current 0mA 0.375mA 1.5356A Internal temperature -144.7 ℃ 0.1 ℃ 264.8 ℃ APS voltage 0mV 1.4mV 5.733V TS pin input 0mV 0.8mV 3.276V GPIO0 0/0.7V 0.5mV 2.0475/2.7475V GPIO1 0/0.7V 0.5mV 2.0475/2.7475V A 9.8 multifunction Pin Description (Multi-Function Pin Description) GPIO [3:0] Can be used as GPIO [3:0] ADC Input (monitoring external signal), LDO, etc. Refer REG90H-96H Description. CHGLED Charge status indicator and, overvoltage overtemperature alarm function and GPO functions, use see REG32H description. 9.9 Timer (Timer) AXP209 contains a 7 bit internal timer by setting register REG8AH [6:0] can change the timer value, REG8AH [6:0] For all 0, the timer the Disable; the REG8AH [6:0] = A timer starts counting from 0 to A, and set bit REG8AH [7], but also to VQ.QW WPPIQPWE CC Confidential Page 26/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 Issued by the timer interrupt. Write REG8AH [7] to clear the flag, and re-start the timer. Clear the interrupt flag will not re-open To start counting. Timer timing smallest step for one minute, and the timing is 1127 minutes. 9.10 decryption (Decryption) AXP209 including a decryption module. The Host by write data to be decrypted to REG300-REG30F, then register Write 1, as of REGB8H [1] started decryption, AXP209 decrypt completed after will state bit REGB8 [0] is set to 1, the Host can REG31x read back the the password data after decryption. The start again decryption AXP209 automatically clear status bits. 9.11 HOST interface and interrupt (TWSI and IRQ) ... ... ... ... ... ... ... ... ... ... ... ... ... ... Figure 1: Single Read and Write VQ.QW WPPIQPWE CC Confidential Page 27/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 Figure 2: Multi Read and Write Host interface through TWSI to the access AXP209 register its operation timing as above shown, supports standard 100KHz or 400KHz frequency, maximum speed up to 1.2MHz, while supporting the tonal / write operation, the device address is 69H (read) and 68H (write). Certain events, AXP209 by driving down the IRQ interrupt mechanism to remind the Host, and interrupt state is saved in the interrupt Status Register (see Register REG48H, register REG49H, register REG4AH, register REG4BH, register REG4CH), write to the corresponding status register bit 1 clears the corresponding interrupt when no interrupt events, IRQ output pulled (by external Pull 51K resistor). Each interrupt can be masked by the interrupt control register (see register REG40H, register REG41H, Send Register REG42H, register REG43H, register REG44H). Location Interrupt number Meaning Location Interrupt number Meaning Register 48H [7] IRQ1 Power ACIN overpressure Register 4AH [3] IRQ20 DCDC3 voltage is too low Register 48H [6] IRQ2 Power ACIN insert Register 4AH [2] Retention Register 48H [5] IRQ3 Power ACIN removed Register 4AH [1] IRQ22 PEK short press Register 48H [4] IRQ4 Power VBUS overpressure Register 4AH [0] IRQ23 PEK long press Register 48H [3] IRQ5 Power VBUS insertion Register 4BH [7] IRQ24 N_OE boot Register 48H [2] IRQ6 Power VBUS removed Register 4BH [6] IRQ25 N_OE shutdown Register 48H [1] IRQ7 VBUS voltage is less than V HOLD Register 4BH [5] IRQ26 VBUS valid Register 48H [0] Retention Register 4BH [4] IRQ27 VBUS invalid Register 49H [7] IRQ8 Battery access Register 4BH [3] IRQ28 VBUS Session Valid Register 49H [6] IRQ9 Battery removal Register 4BH [2] IRQ29 VBUS Session End Register 49H [5] IRQ10 Into the battery activation patterns Register 4BH [1] IRQ30 Low battery warning LEVEL1 VQ.QW WPPIQPWE CC Confidential Page 28/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 Register 49H [4] IRQ11 Exit the battery activation patterns Register 4BH [0] IRQ31 Low battery warning LEVEL2 Register 49H [3] IRQ12 Is charging Register 4CH [7] IRQ32 Timer interrupt Register 49H [2] IRQ13 Charging is complete Register 4CH [6] IRQ33 PEK rising edge Register 49H [1] IRQ14 Battery temperature is too high Register 4CH [5] IRQ34 PEK falling edge Register 49H [0] IRQ15 Battery temperature is too low Register 4CH [4] Retention Register 4AH [7] IRQ16 IC internal over-temperature Register 4CH [3] IRQ35 GPIO3 input edge trigger Register 4AH [6] IRQ17 Insufficient charging current Register 4CH [2] IRQ36 The GPIO2 enter edge triggered Register 4AH [5] IRQ18 DCDC1 voltage is too low Register 4CH [1] IRQ37 The GPIO1 input edge trigger Register 4AH [4] IRQ19 DCDC2 voltage is too low Register 4CH [0] IRQ38 The GPIO0 enter edge triggered 10 registers (Registers) Group 1, the power control class Address Register Description R / W Default values 00 Power Status Register R 01 Power mode / charging status register R 02 The OTG VBUS State register R 04-0F Data cache register R / W 00H 12 DC-DC2 / 3 & LDO2/3/4 & EXTEN control register R / W XXH 23 DC-DC2 voltage setting register R / W XXH 25 DC-DC2/LDO3 voltage slope parameter setting register R / W 00H 27 DC-DC3 voltage setting register R / W XXH 28 LDO2 / 3 voltage setting register R / W XXH 30 The VBUS-IPSOUT path setting register R / W 60H 31 V OFF The shutdown voltage setting register R / W X3H 32 Shutdown, battery testing, CHGLED control register R / W 46H 33 The charging control register 1 R / W CXH 34 Charging control register 2 R / W 41H 35 The spare battery charging control register R / W 22H 36 The PEK parameter setting register R / W 5DH 37 DCDC converter operating frequency setting register R / W 08H 38 Charge the battery low temperature alarm setting register R / W A5H 39 Charge the battery temperature alarm setting register R / W 1FH 3A The APS low electric Level1 set register R / W 68H 3B The APS low electric Level2 set registers R / W 5FH 3C Discharge the battery low temperature alarm setting register R / W FCH 3D Battery discharge temperature alarm setting register R / W 16H 80 The DCDC work mode setting register R / W E0H 82 ADC enable set register 1 R / W 83H VQ.QW WPPIQPWE CC Confidential Page 29/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 83 ADC enable set register 2 R / W 80H 84 ADC sample rate is set, TS pin control register R / W 32H 85 GPIO [1:0] input range setting register R / W X0H 86 GPIO1 ADC IRQ rising edge threshold set R / W FFH 87 GPIO1 ADC IRQ falling edge threshold set R / W 00H 8A Timer control register R / W 00H 8B VBUS monitoring set register R / W 00H 8F Over-temperature shutdown control register R / W 01H Group 2, GPIO control class Address Register Description R / W Default values 90 The GPIO0 control register R / W 07H 91 LDO5 output voltage setting register R / W A0H 92 The GPIO1 Control register R / W 07H 93 The GPIO2 control register R / W 07H 94 GPIO [2:0] signal status register R / W 00H 95 GPIO3 control register R / W 00H Group 3, interrupt control class Address Register Description R / W Default values 40 IRQ enable control register 1 R / W D8H 41 IRQ enable control register 2 R / W FFH 42 IRQ enable control register 3 R / W 3BH 43 IRQ enable control register 4 R / W C1H 44 IRQ enable control register 5 R / W 00H 48 IRQ status register 1 R / W 00H 49 IRQ status register 2 R / W 00H 4A IRQ status register 3 R / W 00H 4B IRQ status register 4 R / W 00H 4C IRQ status register 5 R / W 00H Group 4, the ADC data class Address Register Description R / W 56 [7:0] ACIN voltage ADC data 8 R 57 [3:0] ACIN voltage ADC data 4 R 58 [7:0] High the ACIN current ADC data 8 R 59 [3:0] Low four the ACIN current ADC data R 5A [7:0] The VBUS voltage ADC data 8 R 5B [3:0] The VBUS voltage ADC data 4 R 5C [7:0] The VBUS current ADC data 8 R VQ.QW WPPIQPWE CC Confidential Page 30/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 5D [3:0] VBUS current ADC data 4 R 5E [7:0] AXP209 internal temperature monitoring ADC data 8 R 5F [3:0] AXP209 internal temperature monitoring ADC data 4 R 62 [7:0] TS 8 input ADC data, the default monitoring battery temperature R 63 [3:0] TS input a low ADC data four default monitoring battery temperature R 64 [7:0] High the GPIO0 voltage ADC data 8 R 65 [3:0] Low four the GPIO0 voltage ADC data R 66 [7:0] High the GPIO1 voltage ADC data 8 R 67 [3:0] The GPIO1 voltage ADC data low 4 R 70 [7:0] Instantaneous power of the battery 8 R 71 [7:0] 8 battery instantaneous power R 72 [7:0] Instantaneous power of the battery is low 8 R 78 [7:0] Battery voltage 8 R 79 [3:0] The battery voltage is low 4 R 7A [7:0] Battery charging current 8 R 7B [3:0] Low battery charge current 4 R 7C [7:0] Battery discharge current 8 R 7D [4:0] Battery discharge current low 5 R 7E [7:0] High the system IPSOUT voltage 8 R 7F [3:0] Low voltage systems IPSOUT 4 R Note: The battery-powered power is calculated as Pbat = 2 * Register value * voltage the LSB * current LSB / 1000. Voltage LSB 1.1mV, the current LSB to 0.5mA results mW. Address Register Description R / W Default values B0 Battery charge coulomb meter data register [31:24] R / W 00H B1 Battery charge coulomb meter data register [23:16] R / W 00H B2 Battery charge coulomb meter data register [15:8] R / W 00H B3 Battery charge coulomb meter data register [7:0] R / W 00H B4 Battery discharge coulomb meter data register [31:24] R / W 00H B5 Battery discharge coulomb meter data register [23:16] R / W 00H B6 Battery discharge coulomb meter data register [15:8] R / W 00H B7 Battery discharge coulomb meter data register [7:0] R / W 00H B8 The Coulomb Counter encryption module control register R / W 00H B9 Electricity metering result register R / W 00H Coulomb calculation: C = 65536 * current LSB * (charge Coulomb denominated - discharge coulomb denominated) / 3600 / ADC sampling rate. Including: ADC sampling rate reference to REG84H settings; the current LSB to 0.5mA; the results units mAh. VQ.QW WPPIQPWE CC Confidential Page 31/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 10.1 REG 00H: input power status Bit Description R / W 7 ACIN presence indicates 0: ACIN does not exist; 1: ACIN presence R 6 Instructions the ACIN whether available R 5 VBUS is present indication 0: VBUS does not exist; 1: VBUS exist R 4 Indicate the VBUS whether available R 3 The directions VBUS access before use is greater than V HOLD R 2 Indicates that the battery current direction 0: battery discharge; 1: The battery is charged R 1 Indicate whether ACIN and VBUS input is shorted on the PCB R 0 The instructions start ACIN source is or VBUS 0: Start source non-ACIN / VBUS is;: Start source ACIN / VBUS R 10.2 REG 01H: power operating mode and charge status indication Bit Description R / W 7 Indicating AXP209 whether over-temperature 0: not too warm; 1: overtemperature R 6 Charging indicator 0: not charging or charging has been completed; 1: Charging R 5 The battery state of existence indicates 0: no battery connected to AXP209; 1: the battery has been connected to the AXP209 R 4 Reservations, can not be changed R 3 Indicates whether the battery into the active mode 0: not to enter the the battery activation patterns; 1: has entered the battery activation mode R 2 Indicate the charging current is less than the desired current 0: The actual charge current is equal to the desired current; 1: the actual charge current is less than the desired current R 1-0 Reservations, can not be changed R 10.3 REG 02H: USB OTG VBUS status indication Bit Description R / W 7-3 Reservations, can not be changed 2 Indicate the VBUS whether effective, effective R 1 The directions VBUS Session A / B is effective, and 1 indicates that a valid R 0 Indicative Session End state 1 indicates R VQ.QW WPPIQPWE CC Confidential Page 32/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 10.4 REG 04-0FH: data cache Note: As long as the external power supply, battery or battery backup certain power exists, this data will be kept, not affected by the switch machine. 10.5 REG 12H: Power output control Default value: XXH Bit Description R / W Default values 7 Reservations, can not be changed RW X 6 LDO3 switch control 0: off; 1: open RW X 5 Reservations, can not be changed RW X 4 DC-DC2 switch control RW X 3 LDO4 switch control RW X 2 LDO2 switch control RW X 1 DC-DC3 switch control RW X 0 The EXTEN switch control 0: off; 1: open RW X 10.6 REG 23H: DC-DC2 output voltage setting Default value: XXH Bit Description R / W Default values 7-6 Reservations, can not be changed 5-0 DC-DC2 output voltage setting 0.7-2.275V, 25mV/step Vout = [0.7 + (Bit5-0) * 0.025] V RW X 10.7 REG 25H: DC-DC2/LDO3 dynamic voltage scaling parameter settings Default value: 00H Bit Description R / W Default values 7-4 Reservations, can not be changed 3 LDO3 VRC enable control 0: open; 1: Close RW 0 2 DC-DC2 VRC enable control 0: open; 1: Close RW 0 1 LDO3 VRC control the slope of the voltage rise 0: 25mV/15.625us = 1.6mV/us 1: 25mV/31.250us = 0.8mV/us RW 0 0 DC-DC2 VRC control the slope of the voltage rise 0: 25mV/15.625us = 1.6mV/us 1: 25mV/31.250us = 0.8mV/us RW 0 VQ.QW WPPIQPWE CC Confidential Page 33/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 10.8 REG 27H: DC-DC3 output voltage setting Default value: XXH Bit Description R / W Default values 7 Reservations, can not be changed 6-0 DC-DC3 output voltage setting 0.7-3.5V, 25mV/step Vout = [0.7 + (Bit6-0) * 0.025] V RW X 10.9 REG 28H: LDO2 / 4 output voltage settings Default value: XXH Bit Description R / W Default values 7-4 LDO2 output voltage settings 1.8-3.3V, 100mV/step Vout = [1.8 + (Bit7-4) * 0.1] V RW X 3-0 LDO4 output voltage settings 1.25 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.5 2.7 2.8 3.0 3.1 3.2 3.3 RW X 10.10 REG 29H: LDO3 output voltage settings Default value: XXH Bit Description R / W Default values 7 LDO3 mode select: 0: LDO mode, the voltage is set by the [6:0] 1: switch-mode voltage is decided by LDO3IN RW 0 6-0 LDO3 output voltage setting Bit6-Bit0 0.7-2.275V, 25mV/step Vout = [0.7 + (Bit6-0) * 0.025] V RW X 10.11 REG 30H: VBUS-IPSOUT channel management Default value: 6XH Bit Description R / W Default values 7 VBUS available when the VBUS-IPSOUT pathway selection control signal 0: N_VBUSEN ​​pin, to decide whether to open this path 1: VBUS-IPSOUT path select Open, regardless N_VBUSEN ​​state RW 0 6 VBUS V HOLD Pressure limiting control 0: not limited pressure; 1: limited pressure RW 1 5-3 V HOLD Set up V HOLD = [4.0 + (Bit5-3) * 0.1] V RW 100 2 Reservations, can not be changed 1-0 VBUS current limit control open time limit stream selection RW 0 VQ.QW WPPIQPWE CC Confidential Page 34/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 00:900 mA; 01:500 mA; 10:100 mA; 11: not limit 10.12 REG 31H: V OFF Shutdown voltage setting Default value: X3H of Bit Description R / W Default values 7-4 Reservations, can not be changed 3 Sleep mode the PEK or GPIO edge the wakeup enable set: 0: off 1: Open After writing this bit automatically cleared each into Sleep mode again write 1 2-0 V OFF Set up V OFF = [2.6 + (Bit2-0) * 0.1] V Default: 2.9V RW 011 10.13 REG 32H: shutdown settings, battery detection and CHGLED pins control Default value: 46H Bit Description R / W Default values 7 Shutdown control This bit write output closes AXP209 RW 0 6 Battery monitoring function set bit: 0: off; 1: Open RW 1 5-4 CHGLED pin functions set 00: Hi-Z 01: 25% 1Hz blinking 10: 25% 4Hz blinking 11: output low RW 00 3 CHGLED pin control set 0: control by charging function 1: REG 32H [5:4] control by the register RW 0 2 Output Close timing control 0: Close 1: Contrary to start timing RW 0 1-0 Shutdown delay N_OE AXP209 from low to high Delay time 00: 128mS; 01: 1S; 10: 2S; 11: 3S RW 10 10.14 REG 33H: charge control Default value: CXH Bit Description R / W Default values 7 Charging functions enable control bit 0: Off, 1: open RW 1 6-5 Charging the target voltage set RW 10 VQ.QW WPPIQPWE CC Confidential Page 35/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 00:4.1 V; 01:4.15 V; 10:4.2 V; 11:4.36 V 4 Charging the end of the current set 0: The charging current is less than 10% of the set value, end-of-charge 1: The charging current is less than 15% of the set value, end-of-charge RW 0 3-0 Charging current is set I charge = [300 + (Bit3-0) * 100] mA RW X 10.15 REG 34H: charge control Default value: 45H Bit Description R / W Default values 7 Precharge timeout settings Bit1 RW 0 6 Precharge timeout setting Bit0 00: 40 min; 01: 50min; 10: 60min; 11: 70min RW 1 5 Retention 4 CHGLED mode selection 0: Charging Steady 1: flashes when charging RW 0 3-2 Reservations, can not be changed 1-0 The constant current mode timeout setting Bit1-0 00: 6Hours; 01: 8Hours; 10: 10Hours; 11: 12Hours RW 01 10.16 REG 35H: spare battery charging control Default value: 22H Bit Description R / W Default values 7 Backup battery charge enable control 0: off; 1: open RW 0 6-5 Target backup battery charging voltage set 00:3.1 V; 01:3.0 V; 10:3.6 V; 11:2.5 V RW 01 4-2 Reservations, can not be changed 1-0 Spare battery charging current is set 00: 50uA; 01: 100uA; 10: 200uA; 11: 400uA RW 10 10.17 REG 36H: PEK key parameter settings Default value: 9DH Bit Description R / W Default values VQ.QW WPPIQPWE CC Confidential Page 36/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 7-6 Boot time settings 00: 128mS; 01: 3S; 10: 1S; 11: 2S. RW 01 5-4 Long key time set 00: 1S; 01: 1.5S; 10: 2S; 11: 2.5S. RW 01 3 Key long when you grew up in the shutdown automatic shutdown feature set 0: off; 1: open RW 1 2 The complete power start PWROK signal delay 0:8 mS; 1:64 mS RW 1 1-0 Length setting shutdown 00: 4S; 01: 6S; 10: 8S; 11: 10S. RW 01 10.18 REG 37H: DC-DC operating frequency is set Default value: 08H Bit Description R / W Default values 7-4 Reservations, can not be changed 3-0 DC-DC switching frequency is set Each level change of 5%, the default value of 1.5MHz F = [1 + / - (Bit3-0) * 5%)] * 1.5MHz RW 1000 10.19 REG 38H: V LTF-charge Charging the battery temperature threshold set Default value: A5H of Bit Description R / W Default values 7-0 When charging the battery temperature threshold settings, M M * 10H, when M = A5H corresponding 2.112V; Corresponding voltage 0V3.264V RW A5H V LTF-charge = M * 10H * 0.0008V 10.20 REG 39H: V HTF-charge Battery charging high temperature threshold settings Default value: 1FH Bit Description R / W Default values 7-0 Charging battery high temperature threshold settings, N N * 10H, when N = 1FH corresponding 0.397V; can Corresponding voltage 0V3.264V RW 1FH V HTF-charge = N * 10H * 0.0008V 10.21 REG 3AH: system IPSOUT Vwarning Level1 Default value: 68H Bit Description R / W Default values 7-0 System IPSOUT Vwarning Level1 RW 68H VQ.QW WPPIQPWE CC Confidential Page 37/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 10.22 REG 3BH: IPSOUT Vwarning Level2 Default value: 5FH Bit Description R / W Default values 7-0 System IPSOUT Vwarning Level2 RW 5FH The voltage setting of REG3AH, REG3BH corresponding relations as follows (assuming that the register value of n): Vwarning = 2.8672 + 1.4mV * n * 4 10.23 REG 3CH: V LTF-discharge Battery discharge temperature threshold set Default value: FCH Bit Description R / W Default values 7-0 Discharge the battery temperature threshold settings, M M * 10H, when M = FCH corresponding 3.226V; Corresponding voltage 0V3.264V RW FCH V LTF-discharge = M * 10H * 0.0008V 10.24 REG 3DH: V HTF-discharge Battery discharge high temperature threshold settings Default value: 16H Bit Description R / W Default values 7-0 Battery discharge high temperature threshold settings, N N * 10H, when of N = 16H, corresponding to 0.282V; can The voltage 0V3.264V, RW 16H V LTF-discharge = N * 10H * 0.0008V 10.25 REG 80H: DC-DC mode selection Default value: E0H Bit Description R / W Default values 7-3 Reservations, can not be changed 2 DC-DC2 operating mode control RW 0 1 DC-DC3 operating mode control 0: PFM / PWM auto-switching 1: fixed PWM RW 0 0 Reservations, can not be changed 10.26 REG 82H: ADC Enable 1 Default value: 83H Bit Description R / W Default values VQ.QW WPPIQPWE CC Confidential Page 38/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 7 Battery voltage ADC enable RW 1 6 Battery current ADC enable RW 0 5 The ACIN Voltage ADC is enabled. RW 0 4 The ACIN current ADC is enabled. RW 0 3 VBUS voltage ADC enable RW 0 2 The VBUS current ADC enable RW 0 1 APS voltage ADC enable RW 1 0 TS pin ADC function is enabled 0: Off, 1: open RW 1 10.27 REG 83H: ADC Enable 2 Default value: 80H Bit Description R / W Default values 7 AXP209 internal temperature monitoring ADC enable 0: Off, 1: open RW 1 6-4 Reservations, can not be changed 3 The GPIO0 ADC enable RW 0 2 The GPIO1 ADC enable RW 0 1-0 Reservations, can not be changed 0: Off, 1: open 10.28 REG 84H: ADC sample rate settings, the TS pin control Default value: 32H Bit Description R / W Default values 7-6 ADC sampling rate is set 25 × 2 n Sampling rates of 25, 50, 100, 200Hz RW 0 5-4 TS pin output current settings: 00:20 uA; 01:40 uA; 10:60 uA; 11:80 uA RW 11 3 Reservations, can not be changed 2 TS pin function selection 0: battery temperature monitoring function, 1: independent external ADC input path RW 0 RW 1 1-0 TS pin current output settings 00: Close 01: charging current output 10: ADC Sample input could be saving 11: has been open RW 0 10.29 REG 85H: ADC input range Default value: X0H of VQ.QW WPPIQPWE CC Confidential Page 39/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 Bit Description R / W Default values 7-2 Reservations, can not be changed 1 The GPIO1 ADC input range RW 0 0 The GPIO0 ADC input range 0:0-2.0475 V 1:0.7-2.7475 V RW 0 10.30 REG 86H: GPIO1 ADC IRQ rising edge threshold set Default value: FFH Bit Description R / W Default values 7-0 One LSB 8mV RW FF 10.31 REG 87H: GPIO1 ADC IRQ falling edge threshold set Default value: 00H Bit Description R / W Default values 7-0 One LSB 8mV RW 00 10.32 REG 8AH: timer control Default value: 00H Bit Description R / W Default values 7 Timer expires Write 1 to clear this status RW 0 6-0 Set regular time in minutes To write 0 closed this timer RW 0000000 10.33 REG: VBUS is pin monitoring SRP function control 8BH Default value: 00H Bit Description R / W Default values 7-6 Reservations, can not be changed 5-4 VBUS valid voltage settings 00:4.0 V; 01:4.15 V; 10:4.45 V; 11:4.55 V RW 00 3 VBUS Valid detection function settings: 0: Off, 1: Open RW 0 2 VBUS Session detection function settings: 0: Off, 1: Open RW 0 1 Discharge VBUS discharge feature set 0: Close VBUS discharge resistor; 1: VBUS discharge resistor RW 0 VQ.QW WPPIQPWE CC Confidential Page 40/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 0 Charge VBUS charge feature set 0: Disconnect VBUS charge resistor; 1: VBUS charging resistor to VBUS charge RW 0 10.34 REG 8FH: over-temperature shutdown feature set Default value: 21H Bit Description R / W Default values 7-3 Reservations, can not be changed RW 0 2 AXP209 internal over-temperature shutdown feature set 0: Shutdown; 1: Shutdown RW 0 1-0 Reservations, can not be changed 10.35 REG 90H: GPIO0 feature set Default value: 07H Bit Description R / W Default values 7 GPIO0 rising edge IRQ or Wakeup function RW 0 6 GPIO0 falling edge of IRQ or Wakeup function 0: disable 1: enable RW 0 5-3 Reservations, can not be changed RW 0 2 RW 1 1 RW 1 0 The GPIO0 pin feature set Bit 2-0 000: low output 001: output (3.3V) 010: universal input function 011: low noise LDO5 100: ADC input 1XX: floating RW 1 10.36 REG 91H: LDO5 output voltage as well as the EXTEN / GPIO output high set Default value: A5H of Bit Description R / W Default values 7-4 LDO5 output voltage settings Vout = [1.8 + (Bit7-4) * 0.1] V; defalt = 1.8 +10 * 0.1 = 2.8V RW 1010 3 Reservations, can not be changed 2-0 EXTEN, and GPIO [1:0] set the output high 000:1.8 V; 001:2.5 V; 010:2.8 V; 011:3.0 V; 100:3.1 V; 101:3.3 V; 110:3.4 V; 111:3.5 V RW 101 VQ.QW WPPIQPWE CC Confidential Page 41/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 10.37 REG 92H: GPIO1 feature set Default value: 07H Bit Description R / W Default values 7 GPIO1 rising edge IRQ or Wakeup function RW 0 6 GPIO1 rising edge IRQ or Wakeup function 0: disable 1: enable RW 0 5-3 Reservations, can not be changed RW 0 2-0 The GPIO1 pin functions set 000: low output 001: output (3.3V) 010: universal input function 011: low-noise LDO 100: ADC input 1XX: floating RW 111 10.38 REG 93H: GPIO2 feature set Default value: 07H Bit Description R / W Default values 7 GPIO2 rising edge IRQ or Wakeup function RW 0 6 The GPIO2 falling edge of the IRQ or Wakeup function 0: disable 1: enable RW 0 5-3 Reservations, can not be changed RW 0 2-0 The GPIO2 pin functions set 000: low output 001: floating 010: universal input function XXX: floating RW 111 10.39 REG 94H: GPIO [2:0] signal state setting and monitoring Default value: 00H Bit Description R / W Default values 7 Reservations, can not be changed R 6 The GPIO2 enter state R 5 The GPIO1 enter state R 4 The GPIO0 enter state 0: input low 1: input high R 3-0 Reservations, can not be changed 10.40 REG 95H: GPIO3 set Default value: 00H VQ.QW WPPIQPWE CC Confidential Page 42/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 Bit Description R / W Default values 7 GPIO3 rising edge IRQ or Wakeup function RW 0 6 GPIO3 falling edge of IRQ or Wakeup function 0: disable 1: enable RW 0 5-3 Reservations, can not be changed 2 GPIO3 feature set 0: NMOS Open Drain Output 1: digital input function RW 0 1 GPIO3 output settings 0: output low, NMOS open 1: floating, NMOS Close RW 1 0 GPIO3 input state 0: input high 1: input low R 10.41 REG 40H and 48H: IRQ enable IRQ state The IRQ enable 1, REG40H: The default value: D8H IRQ state REG48H: default value: 00H Bit Description R / W Default values 7-0 The meaning of the status bits of each bit corresponding to 40H; For example: Bit7 is ACIN overvoltage IRQ status bits RW 0 10.42 REG 41H and 49H of the: IRQ Enable IRQ state 2 IRQ energy 2 REG41H: default value: FFH Bit Description R / W Default values 7 IRQ enable battery access RW 1 6 IRQ enable battery removed RW 1 5 The battery activation patterns IRQ enable RW 1 4 The exit cell activation patterns IRQ enable RW 1 3 The is charging IRQ enable RW 1 2 The charging completed IRQ enable RW 1 1 Battery over-temperature IRQ enabled RW 1 0 IRQ Enable battery low temperature RW 1 Bit Description R / W Default values 7 The ACIN overvoltage IRQ enable RW 1 6 The ACIN access IRQ enable RW 1 5 ACIN out of IRQ enable RW 0 4 VBUS overvoltage IRQ enabled RW 1 3 And VBUS access IRQ enable RW 1 2 The VBUS removed IRQ enabled RW 0 1 VBUS available but less than V HOLD IRQ is enabled RW 0 0 Reservations, can not be changed RW 0 VQ.QW WPPIQPWE CC Confidential Page 43/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 The IRQ state REG49H: default value: 00H Bit Description R / W Default values 7-0 The meaning of the status bits, respectively, each bit of the corresponding 41H RW 0 10.43 REG 42H 4AH: IRQ enable IRQ state IRQ can 3 REG42H: default value: 03H Bit Description R / W Default values 7 AXP209 Internal overtemperature IRQ enable RW 0 6 The charging current is less than the set current IRQ enable RW 0 5 Reservations, can not be changed 4 DC-DC2 output voltage is less than the set value IRQ enable RW 0 3 DC-DC3 output voltage is less than the set value IRQ enable RW 0 2 LDO3 output voltage is less than the set value IRQ enable 1 The PEK short key IRQ enable RW 1 0 PEK long keys IRQ enable RW 1 The IRQ state REG4AH: default value: 00H Bit Description R / W Default values 7-0 The meaning of the status bits, respectively, each bit of the corresponding 42H RW 0 10.44 REG 43H 4BH: IRQ Enable 4 and IRQ state IRQ Enable 4, REG43H: default value: 01H Bit Description R / W Default values 7 N_OE boot IRQ enable RW 0 6 IRQ enable N_OE shutdown RW 0 5 VBUS valid IRQ enabled RW 0 4 VBUS invalid IRQ enable RW 0 3 VBUS Session A / B IRQ enable RW 0 2 VBUS Session End IRQ enable RW 0 1 The APS low pressure IRQ Enable (LEVEL1) RW 0 0 The APS low pressure IRQ Enable (LEVEL2) RW 1 The IRQ state REG4BH: default value: 00H Bit Description R / W Default values 7-0 The meaning of the status bits, respectively, each bit of the corresponding 43H RW 0 10.45 REG 44H and 4C: IRQ enable IRQ state 5 IRQ can 5 REG44H default value: 00H; VQ.QW WPPIQPWE CC Confidential Page 44/45 Enhanced single Cell Li-Battery and Power System Management IC AXP209 Bit Description R / W Default values 7 Timer timeout IRQ enable RW 0 6 PEK button on the rising edge IRQ enable RW 0 5 PEK buttons enable falling edge of IRQ RW 0 4 Reservations, can not be changed RW 0 3 GPIO3 input edge-triggered IRQ enable RW 0 2 GPIO2 input edge-triggered IRQ enable RW 0 1 The GPIO1 input edge-triggered or ADC input IRQ enabled RW 0 0 GPIO0 input edge-triggered IRQ enable RW 0 The the IRQ state of 5 REG4CH: default value: 00H Bit Description R / W Default values 7-0 The meaning of the status bits, respectively, each bit of the corresponding 44H RW 0 Note: All IRQ status register corresponding bit write clears state. 10.51 REG B8H: Coulomb Counter Control Default value: 00H Bit Description R / W Default values 7 The coulomb meter switch control RW 0 6 Coulomb Counter pause control, the write will be suspended Coulomb counting while this bit is cleared from RW 0 5 The clear Coulomb Counter control bit write Coulomb Counter will be cleared while this bit is cleared from RW 0 4-2 Reservations, can not be changed RW 0 1-0 The decryption start bit, decryption start automatically cleared RW 0 0 Decryption is complete 0: not completed 1: Complete RW 0 10.52 REG B9H: power measurement results Default value: 7FH Bit Description R / W Default values 7 Metering system control 0: normal operating mode 1: suspend work RW 0 6-0 Measurement results, the percentage of R 7F