MC3S12RG128 Datasheet, PDF (443/546 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 16
Serial Communications Interface (SCIV2)
Block Description
16.1 Introduction
This block guide provide an overview of serial communication interface (SCI) module. The SCI allows
asynchronous serial communications with peripheral devices and other CPUs.
16.1.1 Glossary
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
TXD — Transmit Pin
16.1.2 Features
The SCI includes these distinctive features:
• Full-duplex operation
• Standard mark/space non-return-to-zero (NRZ) format
• 13-bit baud rate selection
• Programmable 8-bit or 9-bit data format
• Separately enabled transmitter and receiver
• Programmable transmitter output parity
• Two receiver wake up methods:
— Idle line wake-up
— Address mark wake-up
• Interrupt-driven operation with eight flags:
— Transmitter empty
MC3S12RG128 Data Sheet, Rev. 1.05
Freescale Semiconductor
443