Data Sheet — MC68HC908MR32 • MC68HC908MR16
Section 13. Serial Communications Interface Module (SCI)
13.1 Introduction
13.2 Features
This section describes the serial communications interface module (SCI,
version D), which allows high-speed asynchronous communications with
peripheral devices and other microcontroller units (MCUs).
Features of the SCI module include:
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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
Separate receiver and transmitter
Programmable transmitter output polarity
Two receiver wakeup methods:
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Idle line wakeup
Address mark wakeup
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Interrupt-driven operation with eight interrupt flags:
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Transmitter empty
Transmission complete
Receiver full
Idle receiver input
Receiver overrun
Noise error
Framing error
Parity error
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Receiver framing error detection
Hardware parity checking
1/16 bit-time noise detection
MC68HC908MR32 • MC68HC908MR16 — Rev. 6.0
MOTOROLA Serial Communications Interface Module (SCI)
Data Sheet
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