MSM62X42B

The features of the MSM62X42B Real Time Clock IC with built-in crystal include: - STOP/START function for clock - 12/24 hour selectable - AEL input for 8048 system, 8051 system or 8085 system (when a microcomputer does not provide the ALE output, fix the AEL input at "H") - Low current consumption for CMOS device - Low STANDBY voltage and small STANDBY current - 32.768kHz built-in crystal oscillator - Real time clock of second, minute, date, month, year, and day of week - Interface corresponding to microcomputer bus - 30-second compensation controlled by software - Periodical interrupt function (or periodical waveform output) for alarm

The interface between the MSM62X42B IC and a microcomputer uses 4 data buses, 4 address buses, 3 control buses, and 2 chip selects.

The ALE input in the MSM62X42B IC is used to read address data and CS0. It functions independently with CS1 and is compatible with 8048 system, 8051 system, and 8085 system.