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

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This is a 7inch touch screen all-in-one kit designed for Raspberry Pi CM4. CM4-DISP-BASE-7A-BOX 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 using.

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 is used to burns the image and cannot be used as an 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 requires a driver for working.



What's on board


Label Name Description
1 CM4 Connector suitable for all variants 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 4x USB 2.0, for connecting sorts of USB devices
7 Micro SD card interface for connecting a Micro SD card with pre-burnt image (Lite variant ONLY)
8 USB SLAVE port USB programming port
9 BOOT switch button ON: CM4 will be booted from USB-C interface
OFF: CM4 will be booted from eMMC or Micro SD card
10 MIPI CSI interface connected to the 5MP front camera
11 Isolated I2C for controlling or reading data from devices via I2C
12 Isolated GPIO for controlling or detecting devices via 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: connect/disconnect the 120R resistor
GPIO: GPIO logic level selection
17 RTC Battery Connector supports CR1220 button cell
18 Touch screen interface connected to the capacitive touch screen
19 Display connector connected to the 7inch 800×480 display
20 M.2 M KEY supports M.2 M KEY NVME SSD, or other communication modules using PCIe channel
21 Speaker interface audio output
22 FAN for connecting cooling fan, allows speed adjustment and measurement
23 RTC Interrupt Pin Switch GL-EN: CM4 powerdown on RTC interruption
PI-RUN: CM4 will reboot on RTC interruption
D16: D16 pin is triggered on RTC interruption (default)
24 System function switch BT_DIS: Bluetooth disabled, for CM4 with antenna variant ONLY
WIFi_DIS: WiFi disabled, for CM4 with antenna variant ONLY
WP_DIS: boot mode switch, ONLY be used when NOT booted from eMMC or SD card
25 FAN Power Supply Selection select 5V (default) or 12V power to drive the fan
26 IO-VREF selection set the CM4 IO logic level as 3.3V (default) or 1.8V
27 RS485 toggle GPIO13/12: using ttyAMA1 device (default)
GPIO15/14: use ttyS0 device
28 I2C bus selection of RTC/FAN SDA0/SCL0: I2C-10 is shared with CSI/DSI
GPIO3/2: I2C-1 is shared with 40PIN GPIO (default)