Transcription of BCM2835 ARM Peripherals - Raspberry Pi
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BCM2835 ARM Peripherals - Raspberry Pi
2012 Broadcom Corporation. All rights reserved Broadcom Europe Ltd. 406 Science Park Milton Road Cambridge CB4 0WW BCM2835 ARM Peripherals 06 February 2012 Broadcom Europe Ltd. 406 Science Park Milton Road Cambridge CB4 0WW Page ii 2012 Broadcom Corporation. All rights reserved Table of Contents 1 Introduction 4 Overview 4 Address map 4 Diagrammatic overview 4 ARM virtual addresses (standard Linux kernel only) 6 ARM physical addresses 6 Bus addresses 6 peripheral access precautions for correct memory ordering 7 2 Auxiliaries: UART1 & SPI1, SPI2 8 Overview 8 AUX registers 9 Mini UART 10 Mini UART implementation details.
Accessing these peripherals from the ARM is not recommended. 1.2 Address map 1.2.1 Diagrammatic overview In addition to the ARM’s MMU, BCM2835 includes a second coarse-grained MMU for mapping ARM physical addresses onto system bus addresses. This diagram shows the main address spaces of interest: ...
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