參數(shù)資料
型號: 9534
廠商: NXP Semiconductors N.V.
英文描述: 8-bit I2C and SMBus, low power I/O port with interrupt
中文描述: 8位I2C和SMBus,低功率的I / O端口中斷
文件頁數(shù): 6/17頁
文件大?。?/td> 146K
代理商: 9534
Philips Semiconductors
Product data sheet
PCA9534
8-bit I
2
C and SMBus low power I/O port with interrupt
2004 Sep 30
6
Device address
0
1
0
0
A2
A1
A0
SLAVE ADDRESS
su01685
FIXED
HARDWARE SELECTABLE
R/W
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
2
SCL
WRITE TO
PORT
DATA OUT
FROM PORT
3
4
5
6
7
8
SDA
S
0
A
A
A
0
1
0
0
A2
A1
A0
DATA 1
slave address
data to port
start condition
R/W
acknowledge
from slave
acknowledge
from slave
acknowledge
from slave
t
pv
DATA 1 VALID
su01421
9
1
0
0
0
0
0
0
0
command byte
P
Figure 6. WRITE to output port register
1
2
SCL
3
4
5
6
7
8
SDA
S
0
A
A
A
0
1
0
0
A2
A1
A0
DATA
slave address
data to register
start condition
R/W
acknowledge
from slave
acknowledge
from slave
acknowledge
from slave
su01422
9
0
0
0
0
0
0
1
command byte
1/0
DATA TO
REGISTER
P
Figure 7. WRITE to configuration or polarity inversion registers
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