¡ Semiconductor MSM6242B
¡ Semiconductor DESCRIPTION
The MSM6242B is a silicon gate
CMOS Real Time Clock/Calendar for use in direct busconnection Microprocessor/Microcomputer 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.
Control Registers D, E and F provide for 30 SECOND error adjustment, INTERRUPT REQUEST (IRQ FLAG) and BUSY status bits, clock STOP, HOLD, and RESET FLAG bits, 4 selectable INTERRUPTS rates are available at the STD.
P
MSM6242B
DIRECT BUS CONNECTED
CMOS REA...