The Intel CHMOS M82510 is designed to increase system efficiency in asynchronous environments such as modems serial ports including expanding performance areas MCS -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 IBM and PC AT are registered trademarks of IBM Corporation