R65C51 ASYNCHRONOUS COMMUNICATIONS PRELiMlNARY DESCRIPTION The Rockwell CMOS R65C51 Asynchronous Communications Interface Adapter (ACIA) provides an easily implemented, program controlled interface between 8-bit microprocessor-based systems and serial communication data sets and modems.
The ACIA has an internal baud rate generator.
This feature eliminates the need for multiple component support circuits, a crystal being the only other part required.
The Transmitter baud rate can be selected under program control to be either 1 of 15 different rates from 50 to 19,200 baud, or at l/16 times an external clock rate.
The Receiver baud rate may be selected under program control to be either the Tr...

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