Specification The CM3+ Compute Module contains the guts of a Raspberry Pi 3 Model B+ (the BCM2837 processor and 1GB RAM) as well as an optional eMMC Flash device of 8GB, 16GB or 32GB (which is the equivalent of the SD card in the Pi).

Broadcom BCM2837B0, Cortex-A53 (ARMv8) 64-bit SoC @ 1.2GHz 1GB LPDDR2 SDRAM 8GB/16GB/32GB eMMC Flash memory, or a Lite variant without eMMC Flash memory This is all integrated onto a small (67.6mm × 31mm) board that fits into a standard DDR2 SODIMM connector. The Flash memory is connected directly to the processor on the board, but the remaining processor interfaces are available to the user via the connector pins. You get the full flexibility of the BCM2837 SoC (which means that many more GPIOs and interfaces are available than with a standard Raspberry Pi), and designing the Module into a custom system should be relatively straightforward because we’ve put all the tricky bits onto the Module itself.

CM3 IO board is an expansion board designed for Raspberry pi compute model CM3 and CM3 lite,(also support CM1). You can get the more wide range and more flexible application environment, you can get more simpler interface

IO board designed with following port:

USB A HDMI Micro USB for Power Micro USB for data (Support OTG) CSI for Camera PH2.0 Battery Port Micro SD Card Slot On/Off Switch AV Slot (Only reserve the weld position for AV) Compatible with [[CM3 ALU Case | Ultra-thin aluminum alloy] Features Can use CM3+, CM3 or CM3L to implement the Raspberry Pi 3B/3B+ function; More GPIO extensions than Raspberry Pi 3B: include standard HAT 40PIN GPIO output (fully compatible with Raspberry Pi 3B/3B+) and extra extension 14 PIN GPIO; Compatible with various expansion boards of Raspberry Pi Support power the board via battery, can read battery capacity by programing Support RTC (need to power the board via PH2.0 battery port) Support CSI/DSI Support OTG interface (via Micro USB Port for data) Support CM3+, CM3 (build in 4GB NAND Flash), support CM3L (TF card slot has a place to use) PCB Size: 85mmx56mm, the max height of the board is about 11.5mm. Indicator light D1, D2 are battery charge status lights D1 is on and D2 is off: Charging (red light) D1 is off and D2 is on: charging is complete (green light) D1 on and D2 on: Test mode (red and green lights are on together) D3 & D4 D3: Raspberry Pi ACT Status Light D4: Power indicator About RTC Function The RTC clock clip is DS3231, and you need to use the external battery do power the RTC via PH 2.0 battery port.(at the same time, the battery can power this IO board also)

How to config CSI and DSI

Add the following line in the config file (config.txt)

dtoverlay=mmc

starup raspberry pi, and enter the console;

wget http://www.raspberrypiwiki.com/download/cm3-io-board/dt-blob-csi-dsi.bin

git clone https://github.com/geekworm-com/cm-io-board.git cd cm-io-board sudo mv dt-blob-csi-dsi.bin /boot/dt-blob.bin