NCV7329 LIN Transceiver Arduino interfacing guide

TECHNICAL SUPPORT Sensors & Modules
1

Customer:

How do I interface the NCV7329 LIN Transceiver breakout board with Arduino? I need code and an interfacing diagram.

Originally submitted via email support on 9 July 2025. Migrated to the forum for community visibility.

2

Soldered Support:

See the documentation at NCV7329 – Overview | Soldered Documentation

You can use the Arduino SoftwareSerial library. Here’s the pin mapping:

NCV7329 Pin Connects to
TXD Arduino D3 (TX via SoftwareSerial)
RXD Arduino D4 (optional, for receive)
EN Arduino D2 (set HIGH to enable)
GND Arduino GND
VS 12V power supply
LIN Your LIN bus line

Here’s a basic example:

#include <SoftwareSerial.h>

#define TX_PIN 3
#define EN_PIN 2

SoftwareSerial linSerial(TX_PIN, -1); // TX only

void setup() {
  pinMode(EN_PIN, OUTPUT);
  digitalWrite(EN_PIN, HIGH); // Enable transceiver

  linSerial.begin(19200); // LIN runs at 19200 bps

  delay(1000);
  sendLINFrame();
}

void loop() {
  // Can send repeatedly, if needed
}

void sendLINFrame() {
  // This is a basic example; not a full LIN frame!
  linSerial.write(0x55); // Sync byte
  linSerial.write(0x10); // Example PID
  linSerial.write(0x01); // Data byte 1
  linSerial.write(0x02); // Data byte 2
  linSerial.write(0x03); // Checksum (placeholder)
}

Important: the transceiver only handles the physical layer of communication—it doesn’t implement the LIN protocol itself. You’ll need to implement the LIN protocol in software on the Arduino side, depending on what your project requires (e.g., acting as a LIN master or slave, what messages to send/receive, etc.).