CM4 socketsuitable for all variants of Compute Module 4

Power input/Programming5V/2.5A power supply, or used for eMMC burning

DISPMIPI DSI display port

FANfor connecting cooling fan, allows speed adjustment and measurement

CAM2x MIPI CSI camera ports

HDMI0 connectorHDMI0 port, supports 4K 30fps output

USB 2.0 ports2x USB 2.0 ports, for connecting sorts of USB devices

Gigabit Ethernet connectorGigabit Ethernet RJ45 connector, with 10 / 100 / 1000M network support

M.2 indicatorindicating the operating status of M.2 interface

ACT indicatorindicating the operating status of Raspberry Pi

PWR indicatorindicating the status of Raspberry Pi power supply

BOOT selectionON: CM4 would be booted from USB-C interfaceOFF: CM4 would be booted from eMMC or Micro SD card

40PIN GPIO header

Micro SD card slotfor connecting a Micro SD card with pre-burnt image (Lite variant ONLY)

HDMI1 FFC connectorHDMI1 port, supports 4K 30fps output

USB 2.0 FFC connectorcan be connected through an adapter

FE1.1SUSB HUB chip, expanding one USB port to 4x ports

M.2 slotsupports sorts of NVME SSD, or communication modules with PCIE M.2 KEY-M interface

RTC chipallows RTC-related functions like wakeup, shutdown, reboot, and more

RTC interrupt selectionPI-RUN: CM4 reboot on RTC interruptionGN-EN: CM4 shutdown on RTC interruptionD4: D4 pin is triggered on RTC interruption

EMC2301fan controller, for speed adjustment / measurement

RTC battery holdersupports CR1220 button cell