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Serial Communications Interface
15.2 Introduction
NOTE:
15.3 Features
Technical Data
240
15.8.2
PTE1/RxD (Receive Data) . . . . . . . . . . . . . . . . . . . . . . . . . 260
15.9
I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
15.9.1
SCI Control Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
15.9.2
SCI Control Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
15.9.3
SCI Control Register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
15.9.4
SCI Status Register 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
15.9.5
SCI Status Register 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
15.9.6
SCI Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
15.9.7
SCI Baud Rate Register . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
This section describes the serial communications interface (SCI)
module, which allows high-speed asynchronous communications with
peripheral devices and other MCUs.
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.
Features of the SCI module include the following:
•
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
Serial Communications Interface Module (SCI)
MC68HC908AB32
Rev. 1.0
-
MOTOROLA
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