Template: CM4-DISP-BASE-7A-BOX Spec

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I am Raspberry Pi CM4 kit 7-inch touch screen all-in-one kit, CM4-DISP-BASE-7A-BOX is a baseboard that can be used with Raspberry Pi Compute Module 4, and supports POE power supply and 7~36V DC power supply, Onboard four-way USB2.0, 7-inch touch screen, etc., the all-in-one kit is convenient for users to use.

Precautions for use

1: Do not plug and unplug any device except USB and HDMI when powered on
2: If the fan needs to be replaced, please confirm the fan voltage and then power on.
3: The USB SLAVE interface burns the image and cannot be used as the OTG interface.
4: In normal use, it is necessary to provide at least 12V 1A power supply for CM4. Otherwise, there may be problems such as automatic shutdown, frequency reduction and so on.
5: Onboard default 4-way USB 2.0 interface.
6: POE function is not supported.
8: The screen needs to add a driver to work.



What's on board


Label Name Description
1 CM4 Connector Applies to all versions of Compute Module 4
2 DC power supply interface 7~36V DC wide voltage power supply, it is recommended to use a 24W or higher power supply
3 CM4 Status Indicator PWR: Raspberry Pi Power Indicator
ACT: Raspberry Pi Working Status Indicator
4 HDMI port Support 4K 30fps output
5 RJ45 Gigabit Ethernet port Support 10 / 100 / 1000M network access
6 USB2.0 interface 4-way 2.0 interface, support various USB device insertion
7 Micro SD card interface For inserting a Micro SD card with the system to start the Compute Module 4 Lite
8 USB SLAVE port USB burner port
9 BOOT switch button ON: Compute Module 4 boots to USB Type-C port
OFF: Compute Module 4 boots to eMMC or Micro SD card
10 MIPI CSI interface A 5-megapixel camera has been connected
11 Isolated I2C Device can be controlled or read via I2C
12 Isolated GPIO The device can be controlled or detected through GPIO
13 Isolated RS485 can communicate through the RS485 interface
14 Isolated RS232 can communicate through the RS232 interface
15 DC power supply 7 ~ 36V DC power supply interface
16 RS485 termination resistor and GPIO logic level selection RS485: 120R connection and disconnection
GPIO: GPIO logic level selection
17 RTC Battery Connector Can be connected to CR1220 button battery
18 Touch screen interface Connected capacitive touch screen
19 Monitor connection interface A 7-inch 800×480 pixel screen is connected
20 M.2 M KEY An NVME SSD that supports M.2 M KEY, or a communication module for other PCIe channels
21 Speaker interface Connect a speaker to output sound
22 FAN Easy access to cooling fans, support for speed regulation and speed measurement
23 RTC Interrupt Pin Switch GL-EN: RTC Trigger Interrupt CM4 Power Off
PI-RUN: RTC Trigger Interrupt CM4 Restart
D16: RTC Trigger Interrupt D16 pin (default)
24 System function switch BT_DIS: Bluetooth disabled, only available for CM4 version with antenna
WIFi_DIS: WIFI disabled, only available for CM4 version with antenna
WP_DIS: Boot mode switch, not using EMMC or SD use at startup
25 FAN Power Supply Selection You can choose 5V (default) or 12V to drive the fan
26 IO-VREF selection CM4 IO logic voltage switching 3.3V (default) or 1.8V
27 RS485 toggle GPIO13/12: use ttyAMA1 device (default)
GPIO15/14: use ttyS0 device
28 I2C bus selection of RTC/FAN SDA0/SCL0: I2C-10 and CSI/DSI share
GPIO3/2: I2C-1 and 40PIN share (default)