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)