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