User`s manual

1 Introduction

The Quatech MPAC-100 is a PCI Type card and is PCI PC Card Standard

Specification compliant. It provides a single-channel RS-232 synchronous

communication port. The base address and IRQ are configured through the PCI

hardware and software using utility programs provided by Quatech. There are no

switches or jumpers to set.

The MPAC-100 uses a Zilog 85230-compatible Serial Communications Controller

(SCC). The SCC can support asynchronous formats, byte-oriented synchronous

protocols such as IBM Bisync, and bit-oriented synchronous protocols such as HDLC

and SDLC. The SCC also offers internal functions such as on-chip baud rate generators,

and digital phase-lock loop (DPLL) for recovering data clocking from received data

streams.

Because the PCI standard does not include a direct memory access (DMA)

interface, the MPAC-100 supports only interrupt-driven communications. To

compensate for the lack of DMA, the MPAC-100 is equipped with 1024-byte FIFOs for

transmit and receive data. The FIFOs provide for high data throughput with very low

interrupt overhead.

1.1 System Requirements

 16 bytes of contiguous I/O address space

 one hardware interrupt (IRQ)

 One available PCI expansion slot

Quatech MPAC-100 User's Manual