IS80LV51 IS80LV31 are high-performance microcontrollers fabricated using high-density CMOS technology and are functionally compatible with the industry standard 80C51 microcontrollers.
The ISSI IS80LV51 and IS80LV31 are high-performance microcontrollers fabricated using high-density CMOS technology. They are functionally compatible with the industry standard 80C51 microcontrollers and designed for applications requiring low voltage operation.
Key features include an 80C51 based architecture, up to 4K x 8 ROM (IS80LV51 only), 128 x 8 RAM, two 16-bit Timer/Counters, a full duplex serial channel, and four 8-bit I/O ports providing 32 I/O lines. The devices support power save modes including Idle and power-down states.
The device operates at a maximum speed of 40 MHz when powered by 3.3V.
A high signal on the RST pin for two machine cycles while the oscillator is running resets the device.
The ALE signal is emitted at a constant rate of 1/6 the oscillator frequency.