參數(shù)資料
型號(hào)： 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(yè)數(shù)： 7/17頁(yè)
文件大小： 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
7
0
0
A2
A1 A0
0
1
0
0
A2
A1
A0
0
1
S
0
A
A
A
COMMAND BYTE
acknowledge
from slave
R/W
acknowledge
from slave
A
P
NA
acknowledge
from slave
acknowledge
from master
S
DATA
DATA
R/W
first byte
at this moment master-transmitter
becomes master-receiver and
slave-receiver becomes
slave-transmitter
last byte
su01424
no acknowledge
from master
1
slave address
data from register
data from register
slave address
Figure 8. READ from register
0
1
0
0
A2
A1
A0
READ FROM
PORT
DATA INTO
PORT
SDA
S
1
A
A
DATA 1
DATA 4
slave address
data from port
data from port
start condition
R/W
acknowledge
from slave
acknowledge
from master
stop
condition
t
ps
DATA 4
DATA 2
P
DATA 3
t
ph
su01465
no acknowledge
from master
NA
INT
t
ir
t
iv
1
2
SCL
3
4
5
6
7
8
9
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 9. READ input port register
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