PCA9534D 查看數據表（PDF） - Philips Electronics

零件编号

产品描述 (功能)

生产厂家

PCA9534D

8-bit I2C and SMBus, low power I/O port with interrupt

Philips Electronics 

Philips Semiconductors

8-bit I2C and SMBus low power I/O port with interrupt

Product data sheet

PCA9534

Device address

SLAVE ADDRESS

0 1 0 0 A2 A1 A0 R/W

FIXED

HARDWARE SELECTABLE

su01685

Figure 5. PCA9534 address

Bus transactions

Data is transmitted to the PCA9534 registers using the write mode as shown in Figures 6 and 7. Data is read from the PCA9534 registers using

the read mode as shown in Figures 8 and 9. 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 0 1 0 0 A2 A1 A0 0 A 0 0 0 0 0 0 0 1 A

start condition

R/W acknowledge

from slave

acknowledge

from slave

WRITE TO

PORT

DATA 1

AP

acknowledge

from slave

DATA OUT

FROM PORT

Figure 6. WRITE to output port register

DATA 1 VALID

tpv

su01421

1 2345 6 78 9

SCL

slave address

command byte

data to register

SDA S 0 1 0 0 A2 A1 A0 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 7. WRITE to configuration or polarity inversion registers

AP

acknowledge

from slave

su01422

2004 Sep 30

6

Share Link: