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Overview

The CD1283 is a multi-function interface controller for printers, scanners, tape-drives, set-top boxes, data acquisition, and other applications that require high-speed, bidirectional, parallel communication with a host computer. All modes of the IEEE STD 1284 Standard Signaling Method for Bidirectional Parallel Peripheral Interface for Personal Computers specification are supported, including ECP, EPP, Reverse Byte, Reverse Nibble, and Compatible. With full support of this standard, the CD1283 provides compatibility with all types of host parallel ports, including older Centronics?, IBM? PS/2? bidirectional, and the latest IEEE 1284-compliant ports.

Product Features

Parallel Port (Peripheral-side) High-speed, bidirectional, multi-protocol parallel port:

■ Hardware implementation of all modes of the IEEE STD (Standard) 1284 specification (including automatic negotiation)

—Centronics?-compatible mode

—Reverse Byte mode

—Reverse Nibble mode

—ECP (extended capabilities port) mode with run-length encoding/decoding

—EPP (enhanced parallel port) mode

—Up to 2-Mbytes/sec. transfer rate in ECP and EPP modes

■ 64-byte parallel FIFO with DMA interface

—64-byte FIFO can accommodate up to 4 Kbytes of compressed data with RLE (run-length encoded) compression enabled

■ Supports peripheral-side operation

■ Data and control input/output pads support IEEE STD1284 level-2 interface specification

■ CPU bus interface

—High-speed slave DMA handshake interface

—Three clocks per word DMA transfers

—On-the-fly data compression using RLE (run-length encoded) encoding and decoding

■ 8/16-bit data interface

—BYTESWAP input provides easy interface to both Big- and Little-Endian systems

—Vectored interrupts simplify interrupt service routines

General

■ System clock up to 25 MHz

■ CMOS technology enables high speed and low power

■ Available in a 100-pin MQFP package