APB
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This document describes an ARM microcontroller system on a chip. It contains an ARM processor core, on-chip RAM, a timer, interrupt controller, and external bus interface. The external bus interface allows the chip to connect to external ROM, RAM, and peripherals using a standard address and data bus protocol.
![Name Description
PCLK Bus clock
PRESETn APB reset
PADDR[31:0] APB address bus
PSELx APB select
PENABLE APB strobe
PWRITE APB transfer direction
PRDATA APB read data bus
PWDATA APB write data bus](https://image.slidesharecdn.com/05113cfc-9429-4918-9a7f-86d1994b83db-160214193941/85/APB-13-320.jpg)
APB
- 9. prdata paddr pwdata PCLK PSELn PSEL1 PSEL2 PWRITE Penab le Present n Select Strobe Address (32-bits) and control Write data (32-bits) Clock Reset Read data (32-bits) System bus slave interface
- 10.
- 11. paddr pwdata PCLK PSELn PSEL1 PSEL2 PWRITE Penab le Present n Select Strobe Address(32-bits) and control Write data(32-bits) Clock Reset Read data(32- bits) System bus slave interface prdata
- 12.
- 13. Name Description PCLK Bus clock PRESETn APB reset PADDR[31:0] APB address bus PSELx APB select PENABLE APB strobe PWRITE APB transfer direction PRDATA APB read data bus PWDATA APB write data bus