These modules provide eight asynchronous serial communication ports from a single PMC carrier slot. Software-configuration helps you quickly set baud rates, character-sizes, stop bits, and parity. Signal support for RTS/CTS handshaking is also included.

For more efficient data processing, each serial port is equipped with 64-character FIFO buffers on the transmit and receive lines.

The data ports generate individually controlled transmit, receive, line status, and data set interrupts. A global interrupt source register provides interrupt status indication for all eight channels to speed up interrupt parsing.

特性 Features

■ Eight RS232E ports

■ 64-byte transmit FIFO buffers

64-byte receive FIFO buffers

■ Programmable baud rate (up to 120Kbps)

■ Individual handshake lines (RTS, CTS) on each channel

■ Line-break and false start-bit detection

■ Industry-standard software-compatible 16C550 configuration registers

Benefits

■ High-density design lowers per-port costs and saves PMC carrier card slots for other functions.

■ 64-byte FIFO buffers minimize CPU interaction for improved system performance.

■ Each serial channel provides handshake support to simplify interfacing with modems.