The PMC-SIO4AR is a four channel full-duplex RS-422/485 serial board with Rear I/O. Each channel can operate up to 10 Mbits/ s. Optional 32 Kbyte FIFO buffer for both transmit and receive (256 Kbytes Total FIFOs) data on each channel provides for a smooth and efficient interface between the serial interfaces and the PMC host computer. The board is based on the Zilog© Z16C30© high speed Integrated Universal Serial Controller (USC) which sup-ports Asynchronous, Isochronous, Bisync, Monosync, HDLC, SDLC, External Sync and Nine-Bit protocols. The USC chip provides full duplex operation with baud rate generators, digital phase-locked loop for clock recovery and a full duplex DMA interface.
