CDP1879 データシートの表示（PDF） - Intersil

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CDP1879

CMOS Real-Time Clock

Intersil 

CDP1879, CDP1879C-1

FREEZE

CIRCUIT

AM - PM

AND

HOUR LOGIC

CALENDAR

LOGIC

XTAL

OSCILLATOR

XTAL

PRESCALE

SECOND

MINUTE

HOUR

DAY

MONTH

PRESCALE CLOCK

SELECT SELECT

CLOCK OUT

INT

RESET

VDD

VSS

CLOCK AND

INT. LOGIC

CONTROL

REGISTER

INT. STATUS

REGISTER

8-BIT DATA BUS

COMPARATOR

SECOND

LATCH

MINUTE

LATCH

HOUR

LATCH

I/O

INTERFACE

DB0-DB7

A0

A1

A2

TPA

IO/MEM

TPB/WR

RD

CS

POWER DOWN

ADDRESS DECODE

AND

CONTROL LOGIC

FIGURE 2. FUNCTIONAL DIAGRAM - TIME COUNTERS HIGHLIGHTED

4-110

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