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Mini Base Board (B) for Raspberry Pi Compute Module 4 (Rev 4)
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£32.40
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Awesome Extras
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
Package Contents
- 1x CM4 Mini Base Board (B)
- 1x SSD Mounting Screw
Compute Module, M.2 SSD and RTC battery not included
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4.00
Based on 3 reviews
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Product Reviews
Mini Base Board (B) for Raspberry Pi Compute Module 4 (Rev 4)
When I set this board up with a CM4 module (4GB + 8GB eMMC ) and NVMe drive it did absolutely nothing - no lights, diddly squat. I suspected a possible issue with the CM4 module. I replaced this with another one (4GB Lite) with the same result.
By pure chance I happened to pull the HDMi cable from the carrier board and powered up - result = success!
After some experimentation I was able to fire up the board and boot from NVMe with both CM4 modules so long as you don't power up with the HDMI cable connected to the board. You could plug in the HDMI after and get a working PC. I even used several different HDMI cables and three different makes of monitor - same results.
Good board for a headless system but a complete faff otherwise. Waveshare wiki no real help. I will be very sceptical of waveshare products in future.
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4 months ago
Mini Base Board (B) for Raspberry Pi Compute Module 4 (Rev 4)
Well packed and fast delivery. Just what I wanted. Thank you
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2 years ago
Mini Base Board (B) for Raspberry Pi Compute Module 4 (Rev 4)
Works fine.
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3 years ago
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