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This Mini Base Board (C) for the Raspberry Pi Compute Module 4 is a compact CM4 breakout option offering a good set of features with a small footprint.
With its dedicated 40-Pin LCD connector to easily connect to a display/touch device, M.2 slot for high-performance storage, 4K HDMI, Real-time clock, dual-CSI ports to connect your cameras, and a host of other features, it's a great base for any CM4 project that you you're planning.
Including this board, there are 3 boards available! Below is a table to show the difference between the 3.
CM4 Base Board | GIGABIT ETH | 40-Pin GPIO | PCIE | USB 2.0 | DSI | HDMI | CSI | RTC | FAN HEADER | POWER INPUT | FEATURES |
MINI BASE A | 1x | Y | M.2 M | 4x | 1x | 2x | ×2 | N | 5V | 5V | Mini size |
MINI BASE B | 1x | Y | M.2 M | 4x | 1x | 2x | ×2 | Y | 5V | 5V | Mini size |
MINI BASE C | 1x | Y | M.2 M | 2x | N/A | 1x | ×2 | Y | 5V | 5V | Dedicated 40PIN LCD Connector |
You can find the A board here and the B board here
Note: Compute Module, M.2 SSD and RTC battery not included
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. LCD Port
40-PIN LCD display port, for direct connection to 70H-1024600 series display
4. FAN
For connecting the cooling fan, allows speed adjustment via IO ports
5.CAM
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 sorts of 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. Raspberry Pi indicators
Green LED: PWR, indicating the status of Raspberry Pi power supply
Red LED: ACT, indicating the operating status of Raspberry Pi
11. Boot switch
ON: CM4 would be booted from the USB-C interface
OFF: CM4 would be booted from eMMC or TF card
12. 40PIN GPIO header
For connecting sorts of HAT
13. TF card slot
For connecting a TF card with a pre-burnt image (Lite variant ONLY)
14. FE1.1S
USB HUB chip, support expanding USB port
15. M.2 slot
Supports sorts of NVME Solid State Drives, or communication modules with PCIE M.2 KEY-M interface
16. RTC chip
Allows RTC-related functions like wakeup, shutdown, reboot, and more
17. RTC interrupt selection
GN-EN: CM4 shutdown(by default) on RTC interruption
PI-RUN: CM4 reboot on RTC interruption
D4: D4 pin is triggered on RTC interruption
18. RTC battery holder
Supports CR1220 button cell
CM4 Socket | Suitable for all variants of Compute Module 4 |
Networking | Gigabit Ethernet RJ45 connector |
Connector | M.2 M KEY, supports communication modules or NVME Solid State Drives |
Raspberry Pi 40PIN GPIO header | |
USB | USB 2.0 Type A × 2 |
Display | LCD port (40pin 0.5mm FPC connector) |
Camera | MIPI CSI-2 camera port × 2 (15pin 1.0mm FPC connector) |
Video | HDMI port, supports 4K 30fps output |
RTC | Real-time clock with battery socket and ability to wake Compute Module 4 |
Storage | TF card socket for Compute Module 4 Lite (without eMMC) variants |
Fan Header | Allows speed adjustment, 5V |
Power Input | 5V |
Dimensions | 85 x 56mm |