Typewriter User Manual

7- 2 MC68340 USER’S MANUAL MOTOROLA

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

Frees

cale Semiconductor,

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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