B288
Jump to navigation
Jump to search
| B288 | |
|---|---|
 | |
| Manufacturer | Allwinner |
| CPU | Dual-Core ARM Cortex-A7 @ 1.008 GHz |
| Extensions | swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 |
| Memory | DDR3/DDR3L/LPDDR2/LPDDR3 |
| Connectivity | |
| Storage | NAND, eMMC, |
| USB | 2.0 OTG, |
| Other | Built-in EPD controller |
| Website | http://www.allwinnertech.com/index.php?c=product&a=index&id=59 |
B288 SoC Features
- PMIC
- AXP227
Software
Source code:
- Linux 3.10.65 from PocketBook
- U-Boot and Boot0 from PocketBook
- SDK to build applications for PocketBook's OS
Technical details
Since there is no user manual available, here are some technical details, gained by reverse engineering:
Memory map
pinmuxing
The SoC features 5 GPIO ports, with PortA and PortE not being used. PortC does not support interrupts.
As usual, pinmux 0 and 1 are always GPIO in and out, respectively, pinmux 6 is for IRQ functionality (not for PortC), and 7 is HighZ. Those are not shown in the table below. The pinmux values have been extracted from the BSP pinctrl driver (pinctrl-sun8iw10p1.c).
Allwinner B288 GPIO multiplex functions
| Pin name | function 2 | function 3 | function 4 | function 5 |
|---|---|---|---|---|
| PB0 | UART2 | JTAG0 | - | VDEVICE |
| PB1 | UART2 | JTAG0 | SPDIF0 | VDEVICE |
| PB2 | UART2 | JTAG0 | - | - |
| PB3 | UART2 | JTAG0 | - | - |
| PB4 | UART0 | PWM0 | - | - |
| PB5 | UART0 | PWM1 | - | - |
| PB6 | TWI0 | - | - | - |
| PB7 | TWI0 | - | - | - |
| PB8 | SPI1 | UART4 | TWI1 | - |
| PB9 | SPI1 | UART4 | TWI1 | - |
| PB10 | SPI1 | UART4 | PWM2 | WIFI_UART0 |
| PB11 | SPI1 | UART4 | PWM3 | WIFI_UART0 |
| PB12 | I2S1 | - | - | - |
| PB13 | I2S1 | - | PWM4 | UART3 |
| PB14 | I2S1 | - | PWM5 | UART3 |
| PB15 | I2S1 | AC0 | TWI1 | UART3 |
| PB16 | I2S1 | AC0 | TWI1 | UART3 |
| PC0 | NAND0 | - | SPI0 | - |
| PC1 | NAND0 | SDC2 | SPI0 | SDC3 |
| PC2 | NAND0 | - | SPI0 | - |
| PC3 | NAND0 | - | SPI0 | - |
| PC4 | NAND0 | SDC2 | - | SDC3 |
| PC5 | NAND0 | SDC2 | - | SDC3 |
| PC6 | NAND0 | SDC2 | UART1 | SDC3 |
| PC7 | NAND0 | SDC2 | UART1 | SDC3 |
| PC8 | NAND0 | SDC2 | UART1 | SDC3 |
| PC9 | NAND0 | SDC2 | UART1 | SDC3 |
| PC10 | NAND0 | SDC2 | UART1 | SDC3 |
| PC11 | NAND0 | SDC2 | UART1 | SDC3 |
| PC12 | NAND0 | SDC2 | UART1 | SDC3 |
| PC13 | NAND0 | SDC2 | UART1 | SDC3 |
| PC14 | NAND0 | SDC2 | - | SDC3 |
| PD0 | LCD0 | UART1 | CSI0 | - |
| PD1 | LCD0 | UART1 | CSI0 | - |
| PD2 | LCD0 | UART5 | - | - |
| PD3 | LCD0 | UART5 | - | - |
| PD4 | LCD0 | UART5 | - | - |
| PD5 | LCD0 | UART5 | - | - |
| PD6 | LCD0 | - | - | - |
| PD7 | LCD0 | - | - | - |
| PD8 | LCD0 | UART1 | - | - |
| PD9 | LCD0 | UART1 | CSI0 | - |
| PD10 | LCD0 | - | - | - |
| PD11 | LCD0 | - | - | - |
| PD12 | LCD0 | - | - | - |
| PD13 | LCD0 | - | CSI0 | - |
| PD14 | LCD0 | - | CSI0 | - |
| PD15 | LCD0 | - | CSI0 | - |
| PD16 | LCD0 | - | CSI0 | - |
| PD17 | LCD0 | - | CSI0 | - |
| PD18 | LCD0 | - | CSI0 | - |
| PD19 | LCD0 | - | CSI0 | - |
| PD20 | LCD0 | - | CSI0 | - |
| PD21 | LCD0 | - | CSI0 | - |
| PD22 | LCD0 | - | CSI0 | - |
| PD23 | LCD0 | - | CSI0 | - |
| PD24 | LCD0 | SPI2 | - | - |
| PD25 | LCD0 | SPI2 | - | - |
| PD26 | LCD0 | SPI2 | - | - |
| PD27 | LCD0 | SPI2 | - | - |
| PD28 | PWM0 | - | - | - |
| PF0 | SDC0 | - | JTAG0 | - |
| PF1 | SDC0 | - | JTAG0 | - |
| PF2 | SDC0 | - | UART0 | - |
| PF3 | SDC0 | - | JTAG0 | - |
| PF4 | SDC0 | - | UART0 | - |
| PF5 | SDC0 | - | JTAG0 | - |
| PF6 | - | - | - | - |
| PG0 | PWM6 | DMIC0 | SPI1 | SDC1 |
| PG1 | PWM7 | DMIC0 | SPI1 | SDC1 |
| PG2 | TWI1 | DMIC0 | SPI1 | SDC1 |
| PG3 | TWI1 | DMIC0 | SPI1 | SDC1 |
| PG4 | TWI2 | DMIC0 | SPI1 | SDC1 |
| PG5 | TWI2 | - | AC0 | SDC1 |
| PG6 | I2S0 | - | - | - |
| PG7 | I2S0 | DSD0 | - | - |
| PG8 | I2S0 | DSD0 | - | - |
| PG9 | I2S0 | DSD0 | BIST_RESULT0 | - |
| PG10 | I2S0 | DSD0 | BIST_RESULT1 | - |
| PG11 | SPDIF0 | - | PLL_LOCK_DBG |
clocks
Devices
Category B288 Devices not found