Datasheet
Table Of Contents
- Raspberry Pi Compute Module 4 IO Board
- Colophon
- Chapter 1. Introduction
- Chapter 2. Features
- 2.1. CM4 Module Connectors
- 2.2. PSU input
- 2.3. Dual Full size HDMI 2.0 connectors
- 2.4. Gigabit Ethernet RJ45
- 2.5. USB 2.0 Hub
- 2.6. Micro USB connector
- 2.7. Micro SD Card socket
- 2.8. PCIe Gen 2 x1 socket
- 2.9. Fan connector
- 2.10. Dual DSI display connectors ( 22pin 0.5mm pitch cable)
- 2.11. Dual CSI-2 display connectors ( 22pin 0.5mm pitch cable)
- 2.12. A Raspberry Pi HAT connector
- 2.13. Real Time Clock (RTC)
- 2.14. Jumpers
- 2.15. LEDs
- Chapter 3. Mechanical Diagram
- Chapter 4. Circuit Diagram
NOTE
Only one of R4 or R5 must be fitted at any one time.
NOTE
J6 CSI0 DSI0 I2C enable
For the J6 jumpers, if either CSI0 or DSI0 it used then both jumpers must be fitted to route the I2C bus to the
connectors
Table 1. J2 jumpers
Pin Function
1-2 nRPIBOOT If fitted forces USB booting, it is useful if the eMMC becomes corrupted.
3-4 EEPROM_nWP If fitted write protects the EEPROM on the CM4
5 AIN0 MXL7704 analog input consult MXL7704 datasheet for details
6 AIN1 MXL7704 analog input consult MXL7704 datasheet for details
7 GND for AIN signals
8 SYNC_IN
9 SYNC_OUT
10 GND
11 TV_OUT
12 GND
13-14 Connect a push button to wake up the CM4 from low power mode. It can’t be used to shutdown the CM4.
Table 2. J3 ( not fitted
by default)
Pin Function
1 WL_nDIS when connected to ground the wireless interface will be disabled
2 GND Ground
3 BT_nDIS when connected to ground the Bluetooth interface will be disabled
Table 3. J1( not fitted
by default)
Pin Function
1 GLOBAL_EN
2 GND
3 RUN_PG
2.15. LEDs
Red LED
This LED duplicates the function of the RED LED on the Raspberry Pi 4, Model B
Green LED
This LED duplicates the function of the GREEN LED on the Raspberry Pi 4, Model B
Raspberry Pi Compute Module 4 IO Board
2.15. LEDs 7