M68ICS08GR datasheet(231/408 Pages) FREESCALE

231 / 408 page

MC68HC908GR8 — Rev 4.0

Technical Data

MOTOROLA

Serial Communications Interface (SCI)

231

Technical Data — MC68HC908GR8

Section 18. Serial Communications Interface (SCI)

18.1 Contents

18.2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231

18.3

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232

18.4

Pin Name Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

18.5

Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

18.6

Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250

18.7

SCI During Break Module Interrupts. . . . . . . . . . . . . . . . . . . . 251

18.8

I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251

18.9

I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252

18.2 Introduction

This section describes the serial communications interface (SCI)

module, which allows high-speed asynchronous communications with

peripheral devices and other MCUs.

NOTE:

References to DMA (direct-memory access) and associated functions

are only valid if the MCU has a DMA module. This MCU does not have

the DMA function. Any DMA-related register bits should be left in their

reset state for normal MCU operation.

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