Module Overview - Motorola MC68306 User Manual

6.1 MODULE OVERVIEW

Features of the serial module are as follows:
• Two, Independent, Full-Duplex Asynchronous/Synchronous Receiver/Transmitter
Channels
• Quadruple-Buffered Receiver
• Double-Buffered Transmitter
• Independently Programmable Baud Rate for Each Receiver and Transmitter
Selectable from:
—18 Fixed Rates: 50 to 38.4 kBaud
—Timer-Generated Baud Rate Up to 170 kbaud
• Programmable Data Format:
—Five to Eight Data Bits Plus Parity
—Odd, Even, No Parity, or Force Parity
—Nine-Sixteenths to Two Stop Bits Programmable in One-Sixteenth Bit Increments
• Programmable Channel Modes:
—Normal (Full Duplex)
—Automatic Echo
—Local Loopback
—Remote Loopback
• Automatic Wakeup Mode for Multidrop Applications
• Multi-Function Three-Bit Input Port
—Can Be Clock or Control Inputs
—Change of State Detection Available
• Multi-Function Three-Bit Output Port
—Individual Bit Set/Reset Capability
—Can Be Status or Interrupt Signal
• Multi-Function Sixteen-Bit Programmable Counter/Timer
• Eight Maskable Interrupt Conditions
• Timer/Counter Interrupt Can Be Independently Programmed
• Parity, Framing, and Overrun Error Detection
• False-Start Bit Detection
• Line-Break Detection and Generation
• Detection of Breaks Originating in the Middle of a Character
• Start/End Break Interrupt/Status
6-2 MC68306 USER'S MANUAL MOTOROLA