PCA9536_5

© NXP B.V. 2010. All rights reserved.

Product data sheet

Rev. 05 — 25 January 2010

9 of 22

NXP Semiconductors

PCA9536

7.

Application design-in information

This figure assumes the command byte has previously been programmed with 00h.

Transfer of data can be stopped at any moment by a STOP condition.

Fig 10. Read Input Port register

0000011

A

S1

START condition

R/W

acknowledge

from slave

002aab857

A

acknowledge

from master

SCL

SDA

NA

read from

port

data into

port

P

9

8

7

6

5

4

3

2

1

data from port

no acknowledge

from master

data from port

DATA 4

slave address

DATA 1

STOP

condition

DATA 2

DATA 3

DATA 4

Device address is 1000 001X; IO0, IO2, IO3 configured as outputs; IO1 configured as input.

Fig 11. Typical application

PCA9536

IO0

IO1

SDA

SCL

002aab858

SDA

SCL

10 k

Ω

10 k

Ω

IO2

IO3

MASTER

CONTROLLER

2 k

Ω

SUBSYSTEM 1

(e.g. temp. sensor)

INT

SUBSYSTEM 2

(e.g. counter)

RESET

controlled switch

(e.g. CBT device)

A

B

enable