The WAVE-21666 is an expansion board that can be used with Raspberry Pi Compute Module 4, and supports 7-36V DC power supply and 5V DC-DC power supply of Type-C interface. Onboard four isolated RS485 interfaces, 100M+1000M dual network ports, HDMI, CSI interfaces, USB, etc.
Specifications
- CM4 SOCKET: suitable for all variants of Compute Module 4
- NETWORKING: Gigabit Ethernet RJ45 connector, 100M Ethernet RJ45 connector
- CONNECTOR: Isolated RS485 × 4, Power screw terminal × 1
- USB: USB 2.0 Type-A × 2
- CAMERA: MIPI CSI-2 port × 2 (15pin 1.0mm FPC connector)
- VIDEO: HDMI port × 1, 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 speed adjustment, 5V
- INDICATOR: Power indicator × 1, CM4 status indicator × 1, User LED × 2, RS485 communication indicator × 8
- POWER INPUT: 7-36V
- DIMENSIONS: 93.6 × 108.8mm
Interface
Board and Dimensions
| 1 | CM4 socket suitable for all variants of Compute Module 4 |
8 | HDMI0 HDMI port, supports 4K 30fps output |
15 | RTC battery socket Supports CR1220 button cell |
22 | RS485 terminal 4 x Isolated RS485 terminal with a spacing of 5.08mm |
| 2 | IO-VREF Set the CM4 IO logic level as 3.3V (default) or 1.8V |
9 | USB 2x USB 2.0, for connecting sorts of USB devices |
16 | RS485 TX/RX indicator TXn: TX indicator for channel n RXn: RX indicator for channel n |
23 | Jumper 120R Balance Resistor Selection Jumper |
| 3 | RTC-12C: 12C bus selection for RTC Can choose SDA0 & SCLO (default) or GPIO2 & GPIO3 |
10 | ETHERNET0 CM4 original Gigabit RJ45 ETH |
17 | User LED USER0: GPIO20 control USER1: GPIO26 control |
24 | RS485 operating mode selection Full-auto: automatic mode, easy for program operation but the load capacity is weak Semi-auto: semi-automatic mode, which requires manual TX/RX switching, with high reliability and strong load capacity |
| 4 | RTC INT: RTC interrupt pin select D16: Use GPIO16 to receive interrupt signal when RTC interruption (default) GL-EN: CM4 powerdown on RTC interruption PI-RUN: CM4 will reboot on RTC interruption |
11 | ETHERNET1 USB extended 100M ETH |
18 | PWR Raspberry Pi power indicator |
25 | Encryption chip ATSHA204 encryption chip, providing multiple encryption to ensure data security and reliability |
| 5 | SYSTEM: System function configuration WP-DIS: Prevent EEPROM from being overwritten BT-DIS: Disable Bluetooth function, for CM4 with antenna variant ONLY WIFI-DIS: Disable WiFi function, for CM4 with antenna variant ONLY |
12 | CAM0 & CAM1 2x MIPI CSI camera ports |
19 | ACT Raspberry Pi working status indicator |
26 | Micro SD card slot for connecting a Micro SD card with a pre-burnt image (Lite variant ONLY) |
| 6 | Boot ON: CM4 will be booted from USB-C interface OFF: CM4 will be booted from eMMC or Micro SD card |
13 | Buzzer GPIO22 control |
20 | DC 7~36V DC power supply interface |
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| 7 | PWR & USB When the BOOT switch is "ON", can be used as the USB programming or DC power supply port When the BOOT switch is "OFF", only used as the DC power supply port |
14 | FAN 4-pin FAN header, only supports 5V FAN, allows PWM speed adjustment (GPIO18 control, speed measurement is not supported) |
21 | Power input terminal DC power supply terminal, supports 7~36V wide range power input |
Resources
Shipping List
Weight: 0.1 kg
- CM4-ETH-RS485-BASE-B x1
WARNING
