UMAX140610. LIN
– J1939 CAN Protocol Converter with PWM Output. Version 1
Page: 62-81
4.4.1 User Requirements
Let the converter be used to control the Microchip Technology
’s Interior Ambient Lighting
Module with LIN interface, part number: APGRD004.
The CAN bus will carry a message controlling light intensity of the red, green and blue
components of the module LED. Ramp up and dim out features will not be used. The LED
control message will control all ambient lighting modules on the LIN bus in all lighting zones.
The module LED should be switched off when the LED control CAN message is not available
due to loss of CAN communication, etc.
4.4.1.1 LIN Bus
The module is designed to work on a LIN bus at a standard baud rate of 10417 bit/sec, defined
in SAE J2602.
The light intensity command frame has the following format:
Frame ID:
0x23
Data Length:
5 byte
Checksum:
Standard
Start Position
Length
Signal Name
0
5 bit
SelectIntensity
5
1 bit
Reserved (should be 0)
6
1 bit
RampUp
7
1 bit
DimDown
8
8 bit
RedSaturation
16
8 bit
GreenSaturation
24
8 bit
BlueSaturation
32
4 bit
ZoneSelection
36
4 bit
Reserved (should be 0)
Signal Name:
SelectIntensity
Init Value:
0x1F
Range:
0…0x1F (0 – off, 0x1F – maximum intensity)
Signal Name:
RampUp
Init Value:
0
Range:
0…1 (0 – no ramp, 1 – ramp up)
Signal Name:
DimDown
Init Value:
0
Range:
0…1 (0 – no dim, 1 – dim out)
Signal Name:
RedSaturation, GreenSaturation, BlueSaturation
Init Value:
0
Range:
0…0xFF (0 – off, 0xFF – maximum intensity)
Signal Name:
ZoneSelection
Init Value:
0x0F
Range:
0…0x0F (0 – no zones, …, 0x0F – all zones)
