MSM58321 - OKI

MSM58321 REAL TIME CLOCK/CALENDAR

The MSM 58321 is a metal gate CMOS Real Time Clock/Calendar with a battery backup function for use in bus-oriented microprocessor applications. The 4-bit bidirectional bus line method is used for the data I/O circuit; the clock is set, corrected, or read by accessing the memory. MSM58321 The time is read with 4-bit DATA I/O, ADDRESS WRITE, READ, and BUSY; .

Features

• 7 Function-Second, Minute, Hour, Day, Day-of-Week, Month, Year
• Automatic leap year calender
• 12/24 hour format
• Frequency divider 5-poststage reset
• Reference signal output
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• 32.768 kHz crystal controlled operation Single 5V power supply Back-up battery operation to VDD = 2.2V Low power dissipation 90 µW max. at VDD = 3V 2.5 mW max. at VDD = 5V
• 16 pin plastic DIP (DIP 16-P-300) FUNCTIONAL BLOCK DIAGRAM 5-poststage (O11~O15) XT XT BUSY N STOP Rp TEST Rp WRITE Rp READ Rp CS1 Rp CS2 Rp D0 D1 D2 D3 TRI-STATE CONTROL ADDRESS LATCH ADDRESS DECODER 0 1 2 3 4 5 6 7 8 9 A B C D E-F S1 S.