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/cpuinfoThe 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 cat /sys/firmware/devicetree/base/model
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 |
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
| Part | Represents | Options |
|---|---|---|
| N | Overvoltage | 0: Overvoltage allowed |
| 1: Overvoltage disallowed | ||
| O | OTP Program1 | 0: OTP programming allowed |
| 1: OTP programming disallowed | ||
| Q | OTP Read1 | 0: OTP reading allowed |
| 1: OTP reading disallowed | ||
| uuu | Unused | Unused |
| W | Warranty bit2 | 0: Warranty is intact |
| 1: Warranty has been voided by overclocking | ||
| u | Unused | 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. |
1 Information on programming the OTP bits can be found here and here.
2 Warranty bit is never set on Pi4.
This list is not exhaustive, there may be codes in use in the field that are not in this table.
| 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 (with BCM2837) | 1.2 | 1GB | Sony UK |
| a21041 | 2B | 1.1 | 1GB | Embest |
| a22042 | 2B (with 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 |
| b03114 | 4B | 1.4 | 2GB | Sony UK |
| c03111 | 4B | 1.1 | 4GB | Sony UK |
| c03112 | 4B | 1.2 | 4GB | Sony UK |
| c03114 | 4B | 1.4 | 4GB | Sony UK |
| d03114 | 4B | 1.4 | 8GB | Sony UK |
| c03130 | Pi 400 | 1.0 | 4GB | Sony UK |