CDP1879 View Datasheet(PDF) - Intersil

Part Name

Description

View to exact match

CDP1879

CMOS Real-Time Clock

Intersil 

CDP1879, CDP1879C-1

N0

N1

N2

XTAL

VDD

XTAL

A0

A1

A2

XTAL

IO/MEM

XTAL

CDP1800

VDD

1/2

CD40107

Q

VDD 1/2

CD40107

CLEAR

VDD

CDP1879

PD

EFI

INT

FIGURE 10. CPU WAKE-UP CIRCUIT USING THE CDP1879 REAL-TIME CLOCK

ADDRESS

LINES

CLEAR

MWR

MRD

TPA

INTERRUPT

MA0

MA1

MA2

MA7

MEMORY

CDP1802

XTAL

XTAL

RESET

TPB/WR

CLOCK

OUT

RD

TPA

INTERRUPT

A0

A1

A2

CS

IO/MEM

VSS

CDP1879

DB0 - DB7

DATA BUS

FIGURE 11. TYPICAL CDP1802 MEMORY MAPPED SYSTEM

4-117

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