M62X42B Datasheet | OKI Electric

DESCRIPTION The MSM62X42B is a bus-connection Microputer 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 microputer 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 microputers if this input is fixed at "H". 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 pensation 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 k Hz and battery backup operation is considered. FEATURES - 32.768k Hz built-in crystal oscillator (2 ranks of ± 10PPM and ± 50PPM --DIP) (2 ranks of ± 20PPM and ± 50PPM --SOP) - Real time clock of second, minute, date, month, year and day of week - Interface corresponding to microputer bus - 30-second pensation controlled by software - Periodical interrupt function (or periodical waveform output) for alarm - STOP/START function for clock - 12/24 hour selectable - AEL input for 8048 system, 8051 system or 8085 system (when a microputer 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 - 18-pin plastic DIP(DIP18-P-300) - 24-pin plastic SOP PIN CONFIGURATION MSM62X42BRS (TOP View) 18 Lead Plastic DIP STD.P 1 CS0 ALE A0 A1 A2 A3 RD GND 2 3 4 5 6 7 8 9 STD.P CS0 NC ALE A0 NC A1 MSM62X42BGS-1K (TOP View) 24 Lead Plastic SOP 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VDD (VDD) (VDD) NC CS1 D0 NC NC D1 D2 D3 WR 17 (VDD) 16 (VDD) 15...