Datasheet

MC9S12E256 Data Sheet, Rev. 1.10
Freescale Semiconductor 249
Chapter 8
Serial Communication Interface (SCIV4)
Block Description
8.1 Revision History
8.2 Introduction
This block description chapter provides an overview of serial communication interface (SCI) module.
The SCI allows full duplex, asynchronous, serial communication between the CPU and remote devices,
including other CPUs. The SCI transmitter and receiver operate independently, although they use the same
baud rate generator. The CPU monitors the status of the SCI, writes the data to be transmitted, and
processes received data.
8.2.1 Glossary
IR: infrared
IrDA: Infrared Design Association
IRQ: interrupt request
LSB: least significant bit
MSB: most significant bit
NRZ: non-return-to-Zero
RZI: return-to-zero-inverted
RXD: receive pin
SCI: serial communication interface
Table 8-1. SCI Revision History
Version
Number
Revision
Date
Effective
Date
Author Description of Changes
04.00 07/30/2002
Add two polarity configure bits to control the polarity of
transmit data and receive data respectively;
Add 1/4 pulse width option for TNP[1:0]=11 in SCIBDRH
register.
04.02 04/16/2004
Update OR flag and PF flag description; Correct baud rate
tolerance in 4.6.5.1 and 4.6.5.2; Clean up classification and
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