Commdio Connectors (Vmx Channels 26-33); Can Connector; Can Termination Jumper - Kauai Labs VMX-pi Reference Manual

VMX-pi Hardware Reference Manual (version 1.10)

CommDIO Connectors (VMX Channels 26-33)

The 3 CommDIO Connectrors are three locking JST GH connectors (4 pins each) with different sets of
power/ground/signals. Each connector may be configured to communication using the corresponding
digital communication protocol. Alternatively, the Input Channels may be configured for use as Digital
Inputs or Interrupts; Output Channels may be configured for use as Digital Outputs or PWM.
Pin 1
I2C Ground
UART Ground
SPI SCK (Channel 30)
[OUTPUT]
Figure 11 CommDIO Connector (VMX Channels 26-33) pinout

CAN Connector

The CAN Connector is a 2-pin Weidmuller Push-in Direct Insert Lock Connectors designed to connect to
the CAN Low (L) and CAN High (H) signals.
s
Figure 12 CAN Connector and CAN 10KOhm Termination Header

CAN Termination Jumper

A CAN Termination Jumper is also provided; when a jumper is installed, a 10K-ohm resistor is enabled in
order to provide CAN bus termination.
Pin 2 Pin 3
Power (5 or 3.3V) SDA (Channel 26)
[OUTPUT]
Power (5 or 3.3V) TX (Channel 28)
[OUTPUT]
MOSI (Channel MISO (Channel
31) [OUTPUT] 32) [INPUT]
21
Pin 4
SCL (Channel 27)
[OUTPUT]
RX (Channel 29)
[INPUT]
CS (Channel 33)
[OUTPUT]