XC888LM datasheet(97/144 Pages) INFINEON

97 / 144 page

XC886/888CLM

Functional Description

Data Sheet

V0.9, 2006-12

The header consists of a break and synch pattern followed by an identifier. Among these

three fields, only the break pattern cannot be transmitted as a normal 8-bit UART data.

The break must contain a dominant value of 13 bits or more to ensure proper

synchronization of slave nodes.

In the LIN communication, a slave task is required to be synchronized at the beginning

of the protected identifier field of frame. For this purpose, every frame starts with a

sequence consisting of a break field followed by a synch byte field. This sequence is

unique and provides enough information for any slave task to detect the beginning of a

new frame and be synchronized at the start of the identifier field.

Upon entering LIN communication, a connection is established and the transfer speed

(baud rate) of the serial communication partner (host) is automatically synchronized in

the following steps:

STEP 1: Initialize interface for reception and timer for baud rate measurement

STEP 2: Wait for an incoming LIN frame from host

STEP 3: Synchronize the baud rate to the host

STEP 4: Enter for Master Request Frame or for Slave Response Frame

Note: Re-synchronization and setup of baud rate are always done for every Master

Request Header or Slave Response Header LIN frame.

XC888LM Datasheet(PDF) 97 Page - Infineon Technologies AG