This document discusses the CPU and operating system used in the Raspberry Pi 3. It provides details on the Broadcom BCM2837 CPU, which is a quad-core Cortex-A53 upgraded from the single-core ARM11 in previous models. The CPU supports up to 1GB of RAM and hardware is compatible with previous models. It also discusses the ARMv8-A instruction set and provides links to documentation on the CPU and its block diagram. Information is given on booting process from the SD card or USB and the contents of the Raspbian Linux image used as the operating system.

1. Linux Kernel 2018 2
@satomicchy
Raspberry Pi 3
CPU

2. Raspberry Pi 3
CPU
OS

3. Raspberry Pi 3
Raspberry Pi 3 Model B v1.2

4. Raspberry Pi 3
github 1 (> <)
https://github.com/raspberrypi/documentation/blob/master/hardware/
raspberrypi/schematics/Raspberry-Pi-3B-V1.2-Schematics.pdf

5. Raspberry Pi 3
Raspberry-Pi-R2.0-Schematics-Issue2.2_027.pdf
https://www.raspberrypi.org/app/uploads/2012/10/Raspberry-Pi-R2.0-Schematics-
Issue2.2_027.pdf

6. Raspberry Pi 3
https://www.raspberrypi.org/forums/viewtopic.php?t=194559

7. CPU
BROADCOM BCM2837
datasheet (> <) → BCM2835
“ Note that the BCM2837 processor is an evolution of the BCM2835
processor. The only real differences are that the BCM2837 can address more
RAM (up to 1Gbyte) and the ARM CPU complex has been upgraded from a
single core ARM11 in BCM2835 to a Quad core Cortex A53 with dedicated
512Kbyte L2 cache in BCM2837. All IO interfaces and peripherals stay the
same and hence the two chips are largely software and hardware
compatible. “
RPI-CM-DATASHEET-V1_0.pdf

8. CPU
BROADCOM BCM2837
https://wikidevi.com/wiki/Broadcom#ARM

9. CPU
ARMv8-A Cortex-A53
https://developer.arm.com/docs/ddi0500/latest/
functional-description/interfaces
http://infocenter.arm.com/help/index.jsp?topic=/
com.arm.doc.ddi0464f/index.html

10. CPU
ARMv8-A Cortex-A53
DDI0500G_cortex_a53_trm.pdf

11. CPU
block diagram
By en:User:Cburnett -
Own work in Inkscape based on en:Image:ARMSoCBlockDiagram.gif, CC BY-SA 3.0,
https://commons.wikimedia.org/w/index.php?curid=2866881

12. OS
RPI-CM-DATASHEET-V1_0.pdf 8.Booting
ON or RUN pin L H
SD/eMMC
bootcode.bin
USB
No
Yes

13. OS
SD3.0_Host_AHB_eMMC4.4_Usersguide_ver5.9_jan11_1
0.pdf
https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=7638

14. OS
2017-11-29-raspbian-stretch.img
SD
._kernel.img
.fseventsd
COPYING.linux
LICENCE.broadcom
LICENSE.oracle
bcm2708-rpi-0-w.dtb
bcm2708-rpi-b-plus.dtb
bcm2708-rpi-b.dtb
bcm2708-rpi-cm.dtb
bcm2709-rpi-2-b.dtb
bcm2710-rpi-3-b.dtb
bcm2710-rpi-cm3.dtb
bootcode.bin
cmdline.txt
config.txt
fixup.dat
fixup_cd.dat
fixup_db.dat
fixup_x.dat
issue.txt
kernel.img
kernel7.img
overlays
start.elf
start_cd.elf
start_db.elf
start_x.elf

15. OK