Serial Communications Interface (SCI)
Technical Data
MC68HC08AZ32A — Rev 1.0
188
Serial Communications Interface (SCI)
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
15.9
15.9.1
15.9.2
15.9.3
15.9.4
15.9.5
15.9.6
15.9.7
I/O Registers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
209
SCI Control Register 1
. . . . . . . . . . . . . . . . . . . . . . . . . . .
209
SCI Control Register 2
. . . . . . . . . . . . . . . . . . . . . . . . . . .
212
SCI Control Register 3
. . . . . . . . . . . . . . . . . . . . . . . . . . .
215
SCI Status Register 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
217
SCI Status Register 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
221
SCI Data Register
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
222
SCI Baud Rate Register
. . . . . . . . . . . . . . . . . . . . . . . . . .
223
15.2 Introduction
The SCI allows asynchronous communications with peripheral devices
and other MCUs.
15.3 Features
The SCI module’s features include:
Full Duplex Operation
Standard Mark/Space Non-Return-to-Zero (NRZ) Format
32 Programmable Baud Rates
Programmable 8-Bit or 9-Bit Character Length
Separately Enabled Transmitter and Receiver
Separate Receiver and Transmitter CPU Interrupt Requests
Programmable Transmitter Output Polarity
Two Receiver Wakeup Methods:
–
Idle Line Wakeup
–
Address Mark Wakeup
Interrupt-Driven Operation with Eight Interrupt Flags:
–
Transmitter Empty
–
Transmission Complete
–
Receiver Full
F
Freescale Semiconductor, Inc.
n
.