Mini Base Board (A)for Raspberry Pi Compute Module 4,suitable for evaluating the Raspberry Pi CM4 or being integrated into end products. With standard CM4 socket and color-coded Raspberry Pi 40 Pin GPIO header, suitable for Compute Module 4 Lite/EMMC series module.Onboard multiple connectors including:CSI/DSI/FAN/HDMI/USB/RJ45 Gigabit Ethernet/Micro SD Card Slot/M.2 Slot Other than the version B, there're NO RTC, Fan controller, and battery holder on Mini Base Board (A), which is more cost effective Precautions for Use 1.This model only support 5V fan and cannot work with the 12V fan. Please confirm the fan voltage before connecting. 2.The DSI Display Port is connecting the DSI0 interface of the CM4, and doesn't use the DSI1 display interface. 3.The Type C interface can be used for power supply or USB SLAVE interface for burning the image. 4.In order to ensure the normal power supply of CM4, please do not connect other devices when using the Type C interface to burn the image. 5.It needs to use a 5V 2A power supply for CM4. Otherwise, problems such as automatic shutdown, frequency reduction, etc. may occur. 6.When using the M.2 interface, please use the matching screws. Using screws of other lengths may cause the CM4 core to be damaged by the screws. 7.The module doesn't have any protection circuit, please do not short-circuit the power supply. 8.USB2.0 is closed by default, if you need to open it, you need to add dtoverlay=dwc2,dr_mode=host in config.txt. 9.HDMI1 uses a flat cable output, if you need to use it, you can purchase an HDMI adapter. Development Resources n9.cl/jkctm Package Content CM4-IO-BASE-A x1 SSD mounting screw x1

The Type C interface can be used for power supply or USB SLAVE interface for burning the image. When using the M.2 interface, please use the matching screws. Using screws of other lengths may cause the CM4 core to be damaged by the screws. This model only support 5V fan and cannot work with the 12V fan. Please confirm the fan voltage before connecting. The DSI Display Port is connecting the DSI0 interface of the CM4, and doesn't use the DSI1 display interface. Onboard multiple connectors including: CSI/DSI/RTC/FAN/HDMI/USB/RJ45 Gigabit Ethernet/Micro SD Card Slot/M.2 Slot. Standard CM4 socket and color-coded Raspberry Pi 40PIN GPIO header. suitable for Compute Module 4 Lite/eMMC series module. Mini Base Board (A) for all versions of Compute Module 4. It uses a 5V/ 2.5A USB Type C interface for power supply. Compared with version B{Mini Base Board (B)}, version A has fewer functions. Without RTC, FAN controller and battery holder,but A version price is more affordable.