Datasheet

MC68HC812A4 Data Sheet, Rev. 7
Freescale Semiconductor 151
Chapter 14
Serial Communications Interface Module (SCI)
14.1 Introduction
The serial communications interface (SCI) allows asynchronous serial communications with peripheral
devices and other MCUs.
14.2 Features
Features of the SCI include:
• Full-duplex operation
• Standard mark/space non-return-to-zero (NRZ) format
• 13-bit baud rate selection
• Programmable 8-bit or 9-bit data format
• Separately enabled transmitter and receiver
• Separate receiver and transmitter interrupt requests
• Two receiver wakeup methods:
– Idle line wakeup
– Address mark wakeup
• Five flags with interrupt-generation capability:
– Transmitter empty
– Transmission complete
– Receiver full
– Receiver overrun
– Idle receiver input
• Receiver noise error detection
• Receiver framing error detection
• Receiver parity error detection