Product Description

The MSM62X42B is a bus-connection Microcomputer peripheral IC of a Real Time Clock with built-in crystal in the perpetual calendar which can be read and written from a second unit. The interface between this IC and a microcomputer uses 4 data buses, 4 address buses, 3 control buses and 2 chip selects and carries out setting up, amending and reading time. ALE input is available for 8048 system, 8051 system or 8085 system and is used for other microcomputers if this input is fixed at "H". ¡ Semiconductor MSM62X42B REAL TIME CLOCK IC WITH BUILT-IN CRYSTAL The clock function provides seconds, minutes, hours, day of week, date, month, year, 12/24 hour selectable, automatic leap year in the Christian Era and 30-second compensation controlled by software. The periodical interrupt function (or periodical waveform output) and the STOP/START function of the clock are also provided. The device is a silicon gate CMOS and the current consumption is low. The built-in crystal oscillator is 32.768 kHz and battery backup operation is considered.