參數(shù)資料
型號： 9531
廠商： NXP Semiconductors N.V.
英文描述： 8-bit I2C LED dimmer
中文描述： 8位I2C LED調(diào)光
文件頁數(shù)： 8/20頁
文件大?。?/td> 154K
代理商： 9531
Philips Semiconductors
Product data
PCA9531
8-bit I
2
C LED dimmer
2003 Nov 10
8
Bus transactions
0
A1
A0
1
2
SCL
WRITE TO
REGISTER
DATA OUT
FROM PORT
3
4
5
6
7
8
SDA
S
0
A
A
A
1
1
0
0
A2
DATA 1
slave address
data to register
start condition
R/W
acknowledge
from slave
acknowledge
from slave
acknowledge
from slave
t
pv
DATA 1 VALID
SW01081
9
B0
0
0
AI
0
B2
B1
command byte
Figure 10. WRITE to register
0
0
AI
0
A
0
A2
0
0
A2
A1
A0
1
1
0
0
A0
1
1
S
0
A
A
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
SW01082
no acknowledge
from master
1
slave address
data from register
data from register
slave address
auto-increment
register address
if AI = 1
A1
B2
B1
B0
Figure 11. READ from register
1
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
SW01084
no acknowledge
from master
NA
DATA 1
NOTES:
1. This figure assumes the command byte has previously been programmed with 00h.
Figure 12. READ input port register
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