參數(shù)資料
型號: 935262899118
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: 8 I/O, PIA-GENERAL PURPOSE, PDSO16
封裝: PLASTIC, TSSOP-16
文件頁數(shù): 11/14頁
文件大?。?/td> 144K
代理商: 935262899118
Philips Semiconductors
Product specification
PCA9556
Octal SMBus Registered Interface
1998 Dec 18
6
SMBus Address
00
1
A2
A1
A0
slave address
su01048
fixed
programmable
R/W
Figure 5. PCA9556 address
SMBus Transactions
Data is transmitted to the PCA9556 registers using Write Byte transfers (see Figures 6 and 7). Data is read from the PCA9556 registers using
Read and Receive Byte transfers (see FIgures 8 and 9).
12
SCL
WRITE TO
PORT
DATA OUT
FROM PORT
3
4
567
8
SDA
S0
A
0
1
A2
A1
A0
DATA 1
slave address
data to port
start condition
R/W
acknowledge
from slave
acknowledge
from slave
acknowledge
from slave
tpv
DATA 1 VALID
su01049
9
1
00
0
00
0
command byte
Figure 6. WRITE to output port register via Write Byte Protocol
12
SCL
3
4
567
8
SDA
S0
A
0
1
A2
A1
A0
DATA
slave address
data to register
start condition
R/W
acknowledge
from slave
acknowledge
from slave
acknowledge
from slave
su01050
9
00
0
00
1
command byte
1/0
Figure 7. WRITE to I/O configuration or polarity inversion registers via Write Byte Protocol
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