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PCF8583P

Clock/calendar with 240×8-bit RAM

Philips Electronics 

Philips Semiconductors

Clock/calendar with 240 × 8-bit RAM

5 BLOCK DIAGRAM

Product specification

PCF8583

handbook, full pagewidth

OSCI

OSCO

INT

VDD

VSS

1

PCF8583

2

OSCILLATOR

32.768 kHz

7

8

POWER-ON

4

RESET

3

A0

6

I2C-BUS

SCL

INTERFACE

5

SDA

DIVIDER

1 : 256

OR

100 : 128

100 Hz

CONTROL

LOGIC

ADDRESS

REGISTER

control/status

00

hundredth of a second 01

seconds

minutes

hours

year/date

weekdays/months

timer

07

alarm control

08

alarm registers

or RAM

0F

RAM

(240 × 8)

FF

MRB001

Fig.1 Block diagram.

6 PINNING

SYMBOL PIN

DESCRIPTION

OSCI

1 oscillator input, 50 Hz or event-pulse

input

OSCO

2 oscillator output

A0

3 address input

VSS

SDA

4 negative supply

5 serial data line

SCL

6 serial clock line

INT

7 open drain interrupt output (active

LOW)

VDD

8 positive supply

handbook, halfpage

OSCI 1

8 VDD

OSCO 2 PCF8583P 7 INT

A0 3 PCF8583T 6 SCL

VSS 4

5 SDA

MRB014

Fig.2 Pinning diagram.

1997 Jul 15

4

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