Compute Module 4 IO Board with PoE (B)

This Waveshare Raspberry Pi Compute Module 4 (CM4) IO board offers additional features when compared to the official Raspberry Pi option, adding built-in POE support that does not require an additional module for POE functionality. This board is ideal for a wider range of industrial applications or makers looking for a great project base for their Compute Module 4 (CM4).

One of the main additional features is the Power over Ethernet (PoE) function, offering an 802.3af-compliant PoE circuit capable of 5V/2.5A. There are also 4x USB 2.0 ports for peripheral and storage expansion.

The GPIO header has also been colour-coded on this IO board to make prototyping your projects and solutions much easier.

The power input connection is set at 5V, requiring a dedicated 5V power supply.  The fan connection supports 5V or 12V for greater cooling flexibility.

The board otherwise offers most of the same functions as the standard IO board including an RTC, 2x MIPI DSI display connections, 2x MIPI CSI-2 camera module connections, micro-SD Card slot, gigabit Ethernet, 2x HDMI ports, and more. See the ‘What’s On Board’ section below for more details.

Note: CM4, other boards, displays, and cables are NOT included

Specifications

• CM4 Socket: S uitable for all variants of Compute Module 4
• Networking: Gigabit Ethernet RJ45 connector, integrates 802.3af-compliant PoE circuit (5V/2.5A)
• Connectors: Raspberry Pi 40-pin GPIO header, non-isolated RS485, non-isolated RS232, PCIe Gen 2 x 1
• USB: USB 2.0 Type A x 4
• Display: MIPI DSI display port x 2 (15pin 1.0mm FPC connector)
• Camera: MIPI CSI-2 camera port x 2 (15pin 1.0mm FPC connector)
• Video: HDMI port × 2, supports 4K 30fps output
• RTC: Real-time clock with battery socket and ability to wake Compute Module 4
• Storage: MicroSD card socket for Compute Module 4 Lite (without eMMC) variants
• Fan Header: Allows for speed adjustment and measurement, 5V / 12V
• Power Input: 5V
• Dimensions: 124.5 x 108.8mm

What’s On Board

• 1) CM4 socket
  • Suitable for all variants of Compute Module 4
• 2) Colour-Coded Standard Raspberry Pi GPIO Header
• 3) BOOT selection
  • ON: CM4 would be booted from USB-C interface
    OFF: CM4 would be booted from eMMC or Micro SD card
• 4) Misc functional pins
• 5) USB Type-C power supply / programming connection
  • 5V/2.5A power supply also allows burning system images into Compute Module 4 eMMC variants
• 6) Status indicators
  • ACT: Raspberry Pi operating status indicator
  • PWR: Raspberry Pi power indicator
• 7) DISP
  • 2x MIPI DSI display port
• 8) CAM
  • 2x MIPI CSI camera ports
• 9) USB2.0 ports
  • 4x USB2.0 ports, for connecting sorts of USB devices
• 10) HDMI ports
  • 2x HDMI ports, supports dual 4K 30fps output
• 11) RTC battery holder
  • Supports CR1220 button cell
• 12) FAN header
  • For connecting cooling fan, allows speed adjustment and measurement
• 13) PCIe Gen 2 × 1 socket
  • For connecting PCIe Gen 2 × 1 modules
• 14) Gigabit Ethernet connector
  • Gigabit Ethernet RJ45 with PoE support, 10/100/1000M compatible
• 15) DC 5V output
• 16) RS485
  • Complete with 600W lightning proof, anti-surge, and 15KV ESD protection,
    reversed optional 120R balancing resistor jumper
• 17) RS232
  • Integrated TVS diode, anti-surge, and ESD protection
• 18) Buzzer
• 19) FAN_VDD/PoE selection
  • Cooling fan driving voltage: 12V or 5V
    PoE: enable (EN) or disable (DIS)

• 20) FE1.1S
  • USB expansion chip
• 21) PCF52063ATL
  • RTC chip
• 22) RTC/FAN
  • I2C bus switch
  • SDA0/SCL0: I2C-10 is shared with CSI/DSI
  • GPIO3/2: I2C-1 is shared with 40PIN header
• 23) IO logic level selection
  • Can set the CM4 IO logic level as 3.3V or 1.8V

• 24) RTC interruption configuration
  • PI-RUN: CM4 will reboot on RTC interruption
  • GN-EN: CM4 powerdown on RTC interruption
  • D4: D4 pin is triggered on RTC interruption
• 25) Micro SD card slot
  • Insert a Micro SD card with pre-burnt system, to start up Compute Module 4 Lite

Resources

• Waveshare Wiki

Package Contents

• 1x Compute Module 4 PoE Board (B)