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