GENERAL DESCRIPTION

The ISSI IS80LV51 and IS80LV31 are high-performance microcontrollers fabricated using high-density CMOS technology. The CMOS IS80LV51/31 is functionally compatible with the industry standard 80C51 microcontrollers.

FEATURES

• 80C51 based architecture

• 4K x 8 ROM (IS80LV51 only)

• 128 x 8 RAM

• Two 16-bit Timer/Counters

• Full duplex serial channel

• Boolean processor

• Four 8-bit I/O ports, 32 I/O lines

• Memory addressing capability

– 64K ROM and 64K RAM

• Programmable lock

– Lock bits (2)

• Power save modes:

– Idle and power-down

• Six interrupt sources

• Most instructions execute in 0.3 µs

• CMOS and TTL compatible

• Maximum speed: 40 MHz @ Vcc = 3.3V

• Industrial temperature available

• Packages available:

– 40-pin DIP

– 44-pin PLCC

– 44-Pin PQFP