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