MC68HC705C9A_1 Datasheet, PDF (80/157 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
General Release Specification _Introduction
9.2 Introduction
This section describes the on-chip asynchronous serial communications
interface (SCI). The SCI allows full-duplex, asynchronous, RS232 or
RS422 serial communication between the MCU and remote devices,
including other MCUs. The transmitter and receiver of the SCI operate
independently, although they use the same baud rate generator.
9.3 Features
Features of the SCI include:
• Standard Mark/Space Non-Return-to-Zero Format
• Full Duplex Operation
• 32 Programmable Baud Rates
• Programmable 8-Bit or 9-Bit Character Length
• Separately Enabled Transmitter and Receiver
• Two Receiver Wakeup Methods:
– Idle Line Wakeup
– Address Mark Wakeup
• Interrupt-Driven Operation Capability with Five Interrupt Flags:
– Transmitter Data Register Empty
– Transmission Complete
– Transmission Data Register Full
– Receiver Overrun
– Idle Receiver Input
• Receiver Framing Error Detection
• 1/16 Bit-Time Noise Detection
MC68HC705C9A — Rev. 2.0
Serial Communications Interface (SCI)
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