MSM6542-01 Datasheet | OKI Electric

DESCRIPTION The MSM6542 is a perpetual-calendar-based real time clock with an alarm function which can read and write data in units of seconds. It can be connected to various buses and can function as a peripheral IC of a microputer. The clock ranges are seconds, minutes, hours, days, months, years, and days of the week. The alarm ranges are seconds, minutes, hours, .. days, months, and days of the week. An event trigger is generated when the time matches the specified time and an alarm occurs or when the clock counter generates a carry. The interrupt and pulse outputs are provided for each of an alarm and a carry. An interface with a microputer is implemented by four data bus pins, four address bus ¡ Semiconductor REAL TIME CLOCK WITH PERIODIC AND ALARM OUTPUT bus pins, three control bus pins, and two chip select pins. These pins are used to write or read data from the clock, alarm, and control registers, or to modify the data. The MSM6542 has an address latch enable (ALE) input...