9536 查看數據表（PDF） - Philips Electronics

零件编号

产品描述 (功能)

生产厂家

9536

4-bit I²C and SMBus I/O port

Philips Electronics 

Philips Semiconductors

4-bit I2C and SMBus I/O port

Objective data sheet

PCA9536

slave address

acknowledge

from slave

S1 0 0 0 0 0 1 0 A

R/W

acknowledge

from slave

slave address

acknowledge

from slave

acknowledge

data from register from master

COMMAND BYTE

A S 1 0 0 0 0 0 11 A

R/W

at this moment master-transmitter

becomes master-receiver and

slave-receiver becomes

slave-transmitter

DATA

A

first byte

data from register

no acknowledge

from master

Figure 7. READ from register

DATA

last byte

NA P

SW02196

SCL

SDA

READ FROM

PORT

1 2345 6 78 9

slave address

data from port

S1 00 00 01 1 A

start condition

R/W acknowledge

from slave

DATA 1

data from port

A

acknowledge

from master

DATA 4

NA P

no acknowledge

from master

stop

condition

DATA INTO

PORT

DATA 2

DATA 3

tph

tps

NOTES:

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

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

Figure 8. READ input port register

DATA 4

SW02197

2004 Aug 20

7

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