The CM4 is a faster and more powerful System on Module (SoM) than previous models, offering a greater range of connectivity and memory options for design engineers building embedded solutions.
Key features include a small form-factor, greater power efficiency, PCle support and a variety of multimedia interfaces. Its power and versatility make it suitable for Artificial Intelligence, the Internet of Things (IoT) and a wide range of home and industrial automation applications.
Raspberry Pi products are increasingly being used in product design with an estimated 40-50 per cent of Raspberry Pi boards now being sold to industrial customers and Original Equipment Manufacturers (OEMs). Farnell has heavily invested in stock to ensure availability for volume orders from engineers looking to integrate CM4 and other Raspberry Pi Compute Modules into new products.
The CM4 is based on the Raspberry Pi Model 4B single-board computer, with an updated form factor accommodating new interfaces such as dual HDMI, PCIe and Gigabit Ethernet, in a reduced footprint. Access to the processor interfaces and GPIO pins is provided via dual 100 pin high density connectors.
For maximum flexibility, CM4 is available with different eMMC flash and DRAM density options, and with optional dual-band wireless connectivity. A “lite” variant is available without the eMMC fitted, making it an ideal solution for cost-sensitive applications.
The CM4 includes:
- Processor: a Broadcom BCM2711 quad-core ARM Cortex-A72 64-bit processor clocked at 1.5GHz, offering industry-leading performance and power efficiency.
- Memory: from 1GB to 8GB of LPDDR4-3200 SDRAM and up to 32GB of eMMC Flash memory depending on the model.
- Multimedia: hardware codec support for H.265 (up to 4kp60 decode) and H.264 (up to 1080p60 decode and 1080p30 encode).
- Connectivity: optional fully certified radio module, supporting dual-band IEEE 802.11 b/g/n/ac wireless networking and Bluetooth 5.0. An on-board electronic switch selects between an external or PCB antenna.
The CM4IO Board can be used with the complete range of CM4 modules and features:
- Gigabit Ethernet connectivity with PoE support (requires separate Raspberry Pi PoE HAT)
- Two full-size HDMI connectors
- Two USB 2 sockets, with a header for two more sockets
- A micro-USB socket for updating the CM4 and a micro SD Card socket for CM4Lite modules
- A PCIe Gen 2 x1 socket
Also available, for use with CM4 variants with an on-board wireless module, is aCompute Module Antenna Kit, which includes an external antenna which has been pre-certified or use with the CM4, reducing additional compliance requirements when an external antenna is required within the design. It is supplied with a bulkhead fixture and a cable with a U.FL connector.
