HC705C9AGRSSLASHD datasheet(80/157 Pages) NXP

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General Release Speciﬁcation

Introduction

MC68HC705C9A — Rev. 2.0

Serial Communications Interface (SCI)

9.2 Introduction

This section describes the on-chip asynchronous serial communications

interface (SCI). The SCI allows full-duplex, asynchronous, RS232 or

RS422 serial communication between the MCU and remote devices,

including other MCUs. The transmitter and receiver of the SCI operate

independently, although they use the same baud rate generator.

9.3 Features

Features of the SCI include:

•

Standard Mark/Space Non-Return-to-Zero Format

•

Full Duplex Operation

•

32 Programmable Baud Rates

•

Programmable 8-Bit or 9-Bit Character Length

•

Separately Enabled Transmitter and Receiver

•

Two Receiver Wakeup Methods:

–

Idle Line Wakeup

–

Address Mark Wakeup

•

Interrupt-Driven Operation Capability with Five Interrupt Flags:

–

Transmitter Data Register Empty

–

Transmission Complete

–

Transmission Data Register Full

–

Receiver Overrun

–

Idle Receiver Input

•

Receiver Framing Error Detection

•

1/16 Bit-Time Noise Detection

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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