MC68HC908AS32A Datasheet, PDF (165/280 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 14
Serial Communications Interface (SCI)
14.1 Introduction
The serial communications interface (SCI) allows asynchronous communications with peripheral devices
and other MCUs.
14.2 Features
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
– Idle receiver input
– Receiver overrun
– Noise error
– Framing error
– Parity error
• Receiver framing error detection
• Hardware parity checking
• 1/16 bit-time noise detection
MC68HC908AS32A Data Sheet, Rev. 2.0
Freescale Semiconductor
165