IC 6551 Asynchronous Communication Interface Adapter DIP 28-pin

Asynchronous Communication Interface Adapter - DIP-28

The S6551 is an asynchronous communication adapter (ACIA) intended to provide interfacing for the microprocessors to serial communication data sets and modems. A unique feature is the inclusion of an on-chip programmable baud rate generator with a crystal being the only external component required.

Features

On-chip baud rate generator: 15 programmable baud rates derived from a standard 1.8432 MHz external crystal (50 to 19,200 baud)

Programmable interrupt and status register to simplify software design

Single +5 volt power supply

Serial echo mode

False start bit detection

8-bit bi-directional data bus for direct communication with the microprocessor

External 16x clock input for non-standard baud rates (up to 125k baud)

Programmable: word lengths; number of stop bits; and parity bit generator and detection

Data set and modem control signals provided

Parity: (odd, even, none, mark, space)

Full-duplex or half-duplex operation

5, 6, 7, 8, and 9-bit transmission

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