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DS1387 Datasheet(PDF) 3 Page - Dallas Semiconductor |
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DS1387 Datasheet(HTML) 3 Page - Dallas Semiconductor |
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3 / 20 page  DS1385/DS1387 012496 3/20 DS1385/DS1387 BLOCK DIAGRAM Figure 1 OSC POWER SWITCH AND WRITE PROTECT VCC BUFFER ENABLE VCC PERIODIC INTERRUPT/SQUARE WAVE SELECTOR SQUARE WAVE OUT SQW IRQ DOUBLE BUFFERED REGISTERS A, B, C, D CLOCK, CALENDAR, AND ALARM BCD/BINARY INCREMENT CLOCK/ CALENDAR UPDATE BUS INTERFACE ALE RD WR AD0-AD7 X1 X2 VCC CS POK + – +3V VBAT CS AS1 AS0 WER USER RAM 50 BYTES ADDRESS HIGH BYTE LATCH ADDRESS LOW BYTE LATCH DATA LATCH NONVOLATILE RAM 4K X 8 64 8 64 OER CONTROL |
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