M6242B Overview
The MSM6242B is a silicon gate CMOS Real Time Clock/Calendar for use in direct busconnection Microprocessor/Microputer applications. An on-chip 32.768 KHz crystal oscillator time base is divided to provide addressable 4-bit I/O data for SECONDS, MINUTES, HOURS, DAY OF WEEK, DATE, MONTH and YEAR. Data access is controlled by 4-bit address, chip selects (CSO, CS1), WRITE, READ, and ALE.
M6242B Key Features
- DAY OF WEEK 7
- 4-bit data bus
- 4-bit address bus
- READ, WRITE, ALE and CHIP SELECT INPUTS
- Status registers
- IRQ and BUSY
- Selectable interrupt outputs
- 1/64 second, 1 second, 1 minute, 1 hour
- Interrupt masking
- 32.768 KHz crystal controlled operation
