Mini Base Board (B) for Raspberry Pi Compute Module 4 (Rev 4)

This Mini Base Board (B) for the Raspberry Pi Compute Module 4 is a compact CM4 breakout option offering a good set of features with a small footprint. Two versions of this board are available - Lite (A) or Full (B). This is the Full (B) version which comes with the additional Real-time Clock (RTC) and fan speed control. With its M.2 slot, MicroSD card slot, Real-Time Clock, dual-CSI ports for camera modules and a host of other features, it's a great base for any CM4 project you're planning. Note: Compute Module, M.2 SSD and RTC battery not included Features The CM4 Mini base board offers the following connectivity options and features:

* 40-pin Raspberry Pi GPIO header

* 1x RJ45 Gigabit Ethernet

* 2x USB 2.0 ports

* 1x Full-size HDMI port

* 1x M.2 slot (Supports NVME SSD or communication modules with PCI-E M.2 KEY-M interface)

* 1x MicroSD slot

* 1x Real-Time Clock (RTC) (battery not included)

* 2x CSI Camera ports

* 1x DSI Display port

* 1x USB 2.0 FFC Connector

* 1x HDMI FFC Connector

* 1x 4-pin fan header

* USB-C programming/power port

Specification

POE N/A

USB USB 2.0 × 2

USB 2.0 × 2 (via FFC connector)

GPIO Raspberry Pi 40PIN GPIO × 1

HEADER M.2 slot × 1

HDMI HDMI × 2

(1x via FFC connector)

Supports 4K 30fps output

DSI DISPLAY MIPI DSI × 1

(15pin 1.0mm FPC)

CSI CAMERA MIPI CSI-2 × 2

(15pin 1.0mm FPC)

POWER INPUT 5V

FAN 5V

Allows speed adjustment and measurement

RTC Real-time clock with battery socket and ability to wake Compute Module 4

RJ45 ETHERNET Gigabit Ethernet

CM4 SOCKET Suitable for all variants of Compute Module 4

SD CARD SLOT MicroSD card socket for Compute Module 4 Lite (without eMMC) variants

DIMENSIONS (MM) 85.0 × 56.0

What's Onboard

1) CM4 socket - Suitable for all variants of Compute Module 4 2) Power input/Programming - 5V/2.5A power supply, or used for eMMC burning 3) DISP - MIPI DSI display port 4) Fan - For connecting cooling fan, allows speed adjustment and measurement 5) Camera - 2x MIPI CSI camera ports 6) HDMI0 connector - HDMI0 port, supports 4K 30fps output 7) USB 2.0 ports - 2x USB 2.0 ports, for connecting USB devices 8) Gigabit Ethernet connector - Gigabit Ethernet RJ45 connector, with 10 / 100 / 1000M network support 9) M.2 indicator - Indicating the operating status of M.2 interface 10) ACT indicator - Indicating the operating status of Raspberry Pi 11) PWR indicator - Indicating the status of Raspberry Pi power supply 12) BOOT selection - ON: CM4 would be booted from USB-C interface - OFF: CM4 would be booted from eMMC or Micro SD card 13) 40-pin GPIO header 14) Micro SD card slot - For connecting a Micro SD card with pre-burnt image (Lite variant ONLY) 15) HDMI1 FFC connector - HDMI1 port, supports 4K 30fps output 16) USB 2.0 FFC connector - Can be connected through an adapter 17) FE1.1S - USB HUB chip, expanding one USB port to 4x ports 18) M.2 slot - Supports NVME SSD, or communication modules with PCI-E M.2 KEY-M interface 19) RTC chip - Allows RTC-related functions like wakeup, shutdown, reboot, and more 20) RTC interrupt selection - PI-RUN: CM4 reboot on RTC interruption - GN-EN: CM4 shutdown on RTC interruption - D4: D4 pin is triggered on RTC interruption 21) EMC2301 - Fan controller, for speed adjustment/measurement 22) RTC battery holder - Supports CR1220 button cell Resources

* Product Wiki

Package Contents

* 1x CM4 Mini Base Board (B)

* 1x SSD Mounting Screw

Compute Module, M.2 SSD and RTC battery not included