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

Device address

SLAVE ADDRESS

1 0 0 0 0 0 1 R/W

FIXED

SW02193

Figure 4. PCA9536 address

Bus transactions

Data is transmitted to the PCA9536 registers using the write mode as shown in Figures 5 and 6. Data is read from the PCA9536 registers using

the read mode as shown in Figures 7 and 8. These devices do not implement an auto-increment function so once a command byte has been

sent, the register which was addressed will continue to be accessed by reads until a new command byte has been sent.

1 2345 6 78 9

SCL

slave address

command byte

data to port

SDA S 1 0 0 0 0 0 1 0 A 0 0 0 0 0 0 0 1 A

DATA 1

start condition

WRITE TO

PORT

R/W acknowledge

from slave

acknowledge

from slave

DATA OUT

FROM PORT

Figure 5. WRITE to output port register

AP

acknowledge

from slave

DATA 1 VALID

tpv

SW02194

1 2345 6 78 9

SCL

slave address

command byte

data to register

SDA S 1 0 0 0 0 0 1 0 A 0 0 0 0 0 0 1 1/0 A

start condition

DATA TO

REGISTER

R/W acknowledge

from slave

acknowledge

from slave

DATA

Figure 6. WRITE to configuration or polarity inversion registers

AP

acknowledge

from slave

SW02195

2004 Aug 20

6

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