UMAX140610. LIN
– J1939 CAN Protocol Converter with PWM Output. Version 1
Page: 6-81
2
CONVERTER DESCRIPTION
The converter is designed to translate application signals between LIN 2.2 and J1939 CAN
networks, at the same time, providing a PWM output to interface to an LED, Sound
Annunciator or other devise.
The converter accepts power supply voltages from 9 to 36 VDC. It can run in LIN master or
slave mode at different baud rate from
2.4…20 kbit/s. The J1939 CAN network can operate at
standard 250 kbit/s and 500 kbit/s baud rates and non-standard 667 kbit/s and 1Mbit/s baud
rates. The required baud rate is detected automatically upon connection to the CAN network.
The converter can be configured through a set of configuration parameters to fit the user
specific application requirements.
2.1 Hardware Block Diagram
The converter contains one LIN port, one CAN port and a protected power supply. An
embedded 32-bit microcontroller provides necessary processing power to the converter.
Figure 1. The Converter Hardware Block Diagram
The converter has a wide range of protections features including a transient and reverse
polarity protection, see
2.2 Software Organization
The LIN
– J1939 CAN Protocol Converter with PWM Output belongs to a family of Axiomatic
smart controllers with configurable internal architecture. This architecture allows building a
converting algorithm based on a set of predefined internal configurable function blocks without
the need of custom software.
The user can configure the converter structure and function blocks using PC-based Axiomatic
Electronic Assistant (EA) software through CAN interface, without disconnecting the converter
from the user system.
