PCF8573 Ver la hoja de datos (PDF) - Philips Electronics

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PCF8573

Clock/calendar with serial I/O

Philips Electronics 

Philips Semiconductors

Clock/calendar with serial I/O

Product specification

PCF8573

14 APPLICATION INFORMATION

handbook, full pagewidth

R: pull-up

resistor R

R

+5 V

VDD

PCF8570

128 × 8 BIT STATIC CMOS RAM

VSS

SDA

MASTER DEVICE

SCL MICROCONTROLLER

32.768 kHz

CT

R1

EXTPF VDD OSCO OSCI

PFIN

PCF8573

SDA

SCL

R2

R3 A0 A1 VSS2 TEST VSS1

1.2 V

(NiCa)

PCF8577

64 LCD

SEGMENT DRIVER

8 DIGIT LCD

detection circuit

with very high

impedance

Rch: resistor for

permanent charging

I2C bus

MBL811

Fig.14 Application example of the PCF8573 clock/calendar with battery backup.

handbook, full pagewidth

+5 V

RR

SCL SDA VDD

MASTER

MICRO-

CONTROLLER

VSS

1.5 V

SCL SDA VDD

A0

OSCI

A1 PCF8573

TEST

PFIN

EXTPF

VSS2

OSCO

VSS1

C

SDA

SCL

CT SCL SDA VDD

PCF8571

VSS

MBL812

Fig.15 Application example of the PCF8573 with common VSS1 and VSS2 supply.

2003 Jan 27

18

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