Elecrow CrowPanel-CM4 Display User Manual page 6

Specification-2
Edge Interfaces
2*20Pin Header
CAM*2
GPIO
Relay
DO&DI
CAN&RS485&ADC
RS232
UART (Type-C)
ETH
Before referencing CM4 resources, please confirm whether the
resources have been reused
MIPI CSI camera interface, compatible with all camera specifications
of Raspberry Pi
GND/GPIO10/GPIO22/3.3V, extend custom functions and connect
to the button board to use custom functions
2*3Pin, control the relay switch through high and low voltage levels
2*4Pin, support two digital input and two digital output channels
2*6Pin, RS485 occupies six pins, CAN occupies three pins, and ADC
occupies three pins
DB9 interface, reserve external industrial non-isolated serial port
USB2.0. USB to UART. Connect to USB device
RJ45 interface. 10/100/1000Mbps. Used for connecting to Ethernet
or other local area networks
5