Reduced Serial Bus

The RSBTM is a push-pull two wire bus developed by Allwinner Technology that supports multiple devices. It supports speeds up to 20 MHz.

= Features =
 * Supports industry-standard AMBA Peripheral Bus (APB) and is fully compliant with the AMBA Specification, Revision 2.0
 * Supports speeds up to 20 MHz
 * Supports Push-Pull bus
 * Supports Host mode
 * Supports multiple devices
 * Supports programmable output delay of CD signal
 * Supports parity check for address and data transmission

= Registers = This list was created from Allwinner code.

CCR
This register controls the RSB bus clock (SCK) speed.

INTE
This register masks/unmasks interrupt events.

STATUS
This register shows interrupt and transfer status. Write 1 to the corresponding bit to clear each interrupt.

LCR
This register can seemingly be used to bit bang the bus.

PMCR
Init sequence related

CMD
List of command codes