Freescale Semiconductor, Inc.
7.1 MODULE OVERVIEW
Features of the serial module are as follows:
• Two, Independent, Full-Duplex Asynchronous/Synchronous Receiver/Transmitter
Channels
• Maximum Data Transfer Rate:
—1× mode: 3 Mbps @ 8.39 MHz CLKOUT, 9.8 Mbps @25 MHz CLKOUT
—16× mode: 188 kbps @ 8.39 MHz CLKOUT, 612 kbps @25 MHz CLKOUT
• Quadruple-Buffered Receiver
• Double-Buffered Transmitter
• Independently Programmable Baud Rate for Each Receiver and Transmitter
Selectable from:
—19 Fixed Rates: 50 to 76.8k Baud
—External 1× Clock or 16× Clock
• 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
• Seven Maskable Interrupt Conditions
• 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
• On-Chip Crystal Oscillator
7- 2
MC68340 USER’S MANUAL
MOTOROLA
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Go to: www.freescale.com
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