MC68HC908QL4 Datasheet, PDF (133/226 Pages) Motorola, Inc – Microcontrollers

Chapter 14
Slave LIN Interface Controller (SLIC) Module
14.1 Introduction
The slave LIN interface controller (SLIC) is designed to provide slave node connectivity on a local
interconnect network (LIN) sub-bus. LIN is an open-standard serial protocol developed for the automotive
industry to connect sensors, motors, and actuators.
The SLIC shares its pins with general-purpose input/output (I/O) port pins. See Figure 14-1 for port
location of these shared pins.
14.2 Features
The SLIC includes these distinctive features:
• Full LIN message buffering of identifier and 8 data bytes
• Automatic bit rate and LIN message frame synchronization:
– No prior programming of bit rate required, 1–20 kbps LIN bus speed operation
– All LIN messages will be received (no message loss due to synchronization process)
– Input clock tolerance as high as ±50%, allowing internal oscillator to remain untrimmed
– Incoming break symbols always allowed to be 10 or more bit times without message loss
– Supports automatic software trimming of internal oscillator using LIN synchronization data
• Automatic processing and verification of LIN SYNCH BREAK and SYNCH BYTE
• Automatic checksum calculation and verification with error reporting
• Maximum of two interrupts per standard LIN message frame with no errors
• Full LIN error checking and reporting
• High-speed LIN capability up to 83.33 kbps to 120.00 kbps⁽¹⁾
• Configurable digital receive filter
• Streamlined interrupt servicing through use of a state vector register
• Switchable UART-like byte transfer mode for processing bytes one at a time without LIN message
framing constraints
• Enhanced checksum (includes ID) generation and verification
1. Maximum bit rate of SLIC module dependent upon frequency of SLIC input clock.
MC68HC908QL4 Data Sheet, Rev. 7
Freescale Semiconductor
133