MC68681P

• Dual Asynchronous Reciiver/Transmitter IC
• Features
• M6800 Bus Compatible
• Two, Independent, Full-Duplex Asynchronous
• Receiver/Transmitter Channes
• Maximum Data Transfer
• 1X - 1 Mbps
• 16X - 125 kbps
• Quadruple-Buffered Receiver Data Registers
• Double-Buffered Transmitter Data Registers
• Independently Programmable Baud Rate for
• Each Receiver and Transmitter
• Selectable from :
• 18 Fixed Rates : 50 to 38.4k Baud
• One User-Defined Rate Derived from a
• Programmable Timer/Counter
• External 1X Clock or 16X Clock
• Programmable Data Format
• Five to Eight Data Bits plus Parity
• Odd, Even, No Parity, or Force Parity
• One, One and One-Half, or 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
• Multifunction 6-Bit Input Port
• Can Serve as Clock or Control Inputs
• Charge-of-State Detection on Four Inputs
• Multifunction 8-Bit Output Port
• Individual Bit Set/Reset Capability
• Outputs Can Be Programmable To Be Status/Interrup
• Signals
• Multifuntion 16-Bit Programmable Counter/Timer
• Versatile Interrupt System
• Single Interrupt Output with Maskable Interrpting
• Conditions
• Interrupt Vector Output on Interrup Acknowledge
• Output Port Can Be Configured To Provide a Total
• of up to Six Separate Wire-ORable Interrupt Outputs
• Parity, Framing, and Overrun Error Detection
• False-start Bit Detection
• Line-Break detection and Generation
• Detects Break Originating in the Middle of a Character
• Start-End Break Interrupt/Status
• On-Chip Crystal Oscillator
• TTL Compatible
• Single +5 - V Power Supply

Marca:

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Características electricas: 150mA/5V/1U

Motorola * Integrated Circuit

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