Freescale Semiconductor, Inc.
Technical Data — MC68HC705C8A
Section 10. Serial Communications Interface (SCI)
10.1 Contents
10.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121
10.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122
10.4 SCI Data Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122
10.5 SCI Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123
10.5.1 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123
10.5.2 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127
10.6 SCI I/O Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129
10.6.1 SCI Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129
10.6.2 SCI Control Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .130
10.6.3 SCI Control Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .131
10.6.4 SCI Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133
10.6.5 Baud Rate Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136
10.2 Introduction
The serial communications interface (SCI) module allows high-speed
asynchronous communication with peripheral devices and other
microcontroller units (MCUs).
MC68HC705C8A — Rev. 3
MOTOROLA
Technical Data
Serial Communications Interface (SCI)
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