RASPIREV(7)

NAME
raspirev - Raspberry Pi revision codes

DESCRIPTION
Each distinct Raspberry Pi model revision has a unique revision code. You can look up a Raspberry Pi's revision code by running:

    $ cat /proc/cpuinfo

The last three lines show the hardware type, the revision code, and the Pi's unique serial number. For example:

    Hardware    : BCM2835
    Revision    : a02082
    Serial      : 00000000765fc593

Note: As of the 4.9 kernel, all Pis report BCM2835, even those with BCM2836, BCM2837 and BCM2711 processors. You should not use this string to detect the processor. Decode the revision code using the information below, or read /sys/firmware/devicetree/base/model

OLD-STYLE REVISION CODES
The first set of Raspberry Pi models were given sequential hex revision codes from 0002 to 0015:
Code | Model | Revision | RAM | Manufacturer
0002 | B | 1.0 | 256MB | Egoman
0003 | B | 1.0 | 256MB | Egoman
0004 | B | 2.0 | 256MB | Sony UK
0005 | B | 2.0 | 256MB | Qisda
0006 | B | 2.0 | 256MB | Egoman
0007 | A | 2.0 | 256MB | Egoman
0008 | A | 2.0 | 256MB | Sony UK
0009 | A | 2.0 | 256MB | Qisda
000d | B | 2.0 | 512MB | Egoman
000e | B | 2.0 | 512MB | Sony UK
000f | B | 2.0 | 512MB | Egoman
0010 | B+ | 1.2 | 512MB | Sony UK
0011 | CM1 | 1.0 | 512MB | Sony UK
0012 | A+ | 1.1 | 256MB | Sony UK
0013 | B+ | 1.2 | 512MB | Embest
0014 | CM1 | 1.0 | 512MB | Embest
0015 | A+ | 1.1 | 256MB/512MB | Embest

NEW-STYLE REVISION CODES
With the launch of the Raspberry Pi 2, new-style revision codes were introduced. Rather than being sequential, each bit of the hex code represents a piece of information about the revision:

    NOQuuuWuFMMMCCCCPPPPTTTTTTTTRRRR

N   Overvoltage
    0   Overvoltage allowed
    1   Overvoltage disallowed

O   OTP Programming; see raspiotp(7)
    0   OTP programming allowed
    1   OTP programming disallowed

Q   OTP Reading; see raspiotp(7)
    0   OTP reading allowed
    1   OTP reading disallowed

uuu Unused

W   Warranty bit
    0   Warranty is intact
    1   Warranty has been voided by overclocking

u   Unused

F   New flag
    1   new-style revision
    0   old-style revision

MMM Memory size
    0   256MB
    1   512MB
    2   1GB
    3   2GB
    4   4GB
    5   8GB

CCCC
    Manufacturer
    0   Sony UK
    1   Egoman
    2   Embest
    3   Sony Japan
    4   Embest
    5   Stadium

PPPP
    Processor
    0   BCM2835
    1   BCM2836
    2   BCM2837
    3   BCM2711

TTTTTTTT
    Type
    0   A
    1   B
    2   A+
    3   B+
    4   2B
    5   Alpha (early prototype)
    6   CM1
    8   3B
    9   Zero
    a   CM3
    c   Zero W
    d   3B+
    e   3A+
    f   Internal use only
    10  CM3+
    11  4B
    13  400
    14  CM4

RRRR
    Revision (0, 1, 2, etc.)

New-style revision codes in use at the time of writing:
Code | Model | Revision | RAM | Manufacturer
900021 | A+ | 1.1 | 512MB | Sony UK
900032 | B+ | 1.2 | 512MB | Sony UK
900092 | Zero | 1.2 | 512MB | Sony UK
900093 | Zero | 1.3 | 512MB | Sony UK
9000c1 | Zero W | 1.1 | 512MB | Sony UK
9020e0 | 3A+ | 1.0 | 512MB | Sony UK
920092 | Zero | 1.2 | 512MB | Embest
920093 | Zero | 1.3 | 512MB | Embest
900061 | CM | 1.1 | 512MB | Sony UK
a01040 | 2B | 1.0 | 1GB | Sony UK
a01041 | 2B | 1.1 | 1GB | Sony UK
a02082 | 3B | 1.2 | 1GB | Sony UK
a020a0 | CM3 | 1.0 | 1GB | Sony UK
a020d3 | 3B+ | 1.3 | 1GB | Sony UK
a02042 | 2B (BCM2837) | 1.2 | 1GB | Sony UK
a21041 | 2B | 1.1 | 1GB | Embest
a22042 | 2B (BCM2837) | 1.2 | 1GB | Embest
a22082 | 3B | 1.2 | 1GB | Embest
a220a0 | CM3 | 1.0 | 1GB | Embest
a32082 | 3B | 1.2 | 1GB | Sony Japan
a52082 | 3B | 1.2 | 1GB | Stadium
a22083 | 3B | 1.3 | 1GB | Embest
a02100 | CM3+ | 1.0 | 1GB | Sony UK
a03111 | 4B | 1.1 | 1GB | Sony UK
b03111 | 4B | 1.1 | 2GB | Sony UK
b03112 | 4B | 1.2 | 2GB | Sony UK
c03111 | 4B | 1.1 | 4GB | Sony UK
c03112 | 4B | 1.2 | 4GB | Sony UK
d03114 | 4B | 1.4 | 8GB | Sony UK

SEE ALSO
raspiotp(7), [SOURCE]

REFERENCES

[SOURCE]
    https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-revision-codes