ASYNCHRONOUS SERIAL CONTROLLER

The Intel CHMOS M82510 is designed to increase system efficiency in asynchronous environments such as modems, serial ports—including expanding performance areas: MCSé-51 9-bit format and high speed async. The functional support provided in the M82510 is unparalleled—2 baud rate generators/timers provide independent data rates or protocol timeouts; a crystal oscillator and smart modem I/O simplify system logic. New features, dual FIFOs and Control Character Recognition (CCR), dramatically reduce CPU interrupts and increase software efficiency. The M82510’s software versatility allows emulation of the INS 8250A/16450 for IBM PC AT* compatibility or a high performance mode, configured by 35 control registers. All interrupts are maskable at 2 levels. The multi-personality I/O pins are configurable as desired. A DPLL and multiple sampling of serial data improve data reliability for high speed asynchronous communication. The compact 28-pin M82510 is fabricated in CHMOS III technology and includes a software powerdown option.

■ Asynchronous Operation

— 5- to 9-Bit Character Format

— Baud Rate DC to 288k

— Complete Error Detection

■ Multiple Sampling Windows

■ Two, Independent, Four-Byte Transmit and Receive FIFOs

— Programmable Threshold

■ Two, 16-bit Baud Rate Generators/ Timers

■ System Clock Options

— On-Chip Crystal Oscillator

— External Clocks

■ MCSé-51 9-Bit Protocol Support

■ Control Character Recognition

■ CHMOS III with Power Down Mode

■ Interrupts Maskable at Two Levels

■ Auto Echo and Loopback Modes

■ Seven I/O Pins, Dedicated and General Purpose

■ Available in 28-Lead CERDIP and 28-Pad LCC Packages

■ Military Temperature Range: -55°C to +125°C (TC)