Raspberry-pi technical data sheet

BCM2835 ARM Peripherals © 2012 Broadcom Corporation. All rights reserved Broadcom Europe Ltd. 406 Science Park Milton Road Cambridge CB4 0WW Table of Contents 1 Introduction 4 1.1 Overview 4 1.2 Address map 4 1.2.1 Diagrammatic overview 4 1.2.2 ARM virtual addresses (standard Linux kernel only) 6 1.2.3 ARM physical addresses 6 1.2.4 Bus addresses 6 1.3 Peripheral access precautions for correct memory ordering 7 2 Auxiliaries: UART1 & SPI1, SPI2 8 2.1 Overview 8 2.1.1 AUX registers 9 2.2 Mini UART 10 2.2.1 Mini UART implementation details. 11 2.2.2 Mini UART register details. 11 2.3 Universal SPI Master (2x) 20 2.3.1 SPI implementation details 20 2.3.2 Interrupts 21 2.3.3 Long bit streams 21 2.3.4 SPI register details. 22 3 BSC 28 3.1 Introduction 28 3.2 Register View 28 3.3 10 Bit Addressing 36 4 DMA Controller 38 4.1 Overview 38 4.2 DMA Controller Registers 39 4.2.1 DMA Channel Register Address Map 40 4.3 AXI Bursts 63 4.4 Error Handling 63 4.5 DMA LITE Engines 63 5 External Mass Media Controller 65 o Introduction 65 o Registers 66 6 General Purpose I/O (GPIO) 89 6.1 Register View 90 6.2 Alternative Function Assignments 102 6.3 General Purpose GPIO Clocks 105 7 Interrupts 109 7.1 Introduction 109 7.2 Interrupt pending. 110 7.3 Fast Interrupt (FIQ). 110 7.4 Interrupt priority. 110 7.5 Registers 112 8 PCM / I2S Audio 119 8.1 Block Diagram 120 8.2 Typical Timing 120 8.3 Operation 121 8.