
MC68HC05C8A
—
Rev. 3.0
General Release Specification
MOTOROLA
Serial Communications Interface (SCI)
63
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General Release Specification — MC68HC05C8A
Section 9. Serial Communications Interface (SCI)
9.1 Contents
9.2
9.3
9.4
9.5
9.5.1
9.5.1.1
9.5.1.2
9.5.1.3
9.5.1.4
9.5.1.5
9.5.2
9.5.2.1
9.5.2.2
9.5.2.3
9.5.2.4
9.5.2.5
9.5.2.6
9.6
9.6.1
9.6.2
9.6.3
9.6.4
9.6.5
Introduction...............................................................................63
Features....................................................................................64
SCI Data Format.......................................................................64
SCI Operation...........................................................................65
Transmitter..........................................................................65
Character Length .............................................................65
Character Transmission...................................................65
Break Characters.............................................................67
Idle Characters.................................................................67
Transmitter Interrupts.......................................................67
Receiver..............................................................................68
Character Length .............................................................69
Character Reception........................................................69
Receiver Wakeup.............................................................69
Receiver Noise Immunity.................................................70
Framing Errors.................................................................70
Receiver Interrupts...........................................................70
SCI I/O Registers......................................................................71
SCI Data Register ...............................................................71
SCI Control Register 1 ........................................................72
SCI Control Register 2 ........................................................74
SCI Status Register.............................................................76
Baud Rate Register.............................................................78
9.2 Introduction
The serial communications interface (SCI) module allows high-speed
asynchronous communication with peripheral devices and other MCUs.