MC908MR32CFUE Datasheet, PDF (157/282 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 13
Serial Communications Interface Module (SCI)
13.1 Introduction
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).
13.2 Features
Features of the SCI module 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
• Separate receiver and transmitter
• 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
– Idle receiver input
– Receiver overrun
– Noise error
– Framing error
– Parity error
• Receiver framing error detection
• Hardware parity checking
• 1/16 bit-time noise detection
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
Freescale Semiconductor
157