參數(shù)資料
型號: PCA9674A
廠商: NXP Semiconductors N.V.
英文描述: Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt
中文描述: 遠程8位I / O擴展調(diào)頻I2C總線的中斷
文件頁數(shù): 7/34頁
文件大?。?/td> 179K
代理商: PCA9674A
PCA9674_PCA9674A_2
NXP B.V. 2006. All rights reserved.
Product data sheet
Rev. 02 — 12 October 2006
7 of 34
NXP Semiconductors
PCA9674/74A
Remote 8-bit I/O expander for Fm+ I
2
C-bus with interrupt
The last bit of the first byte defines the operation to be performed. When set to logic 1 a
read is selected, while a logic 0 selects a write operation.
When AD2, AD1 and AD0 are held to V
DD
or V
SS
, the same address as the PCF8574 or
PCF8574A is applied.
7.1.1
Address maps
Fig 8.
PCA9674/74A address
R/W
002aab636
A6
A5
A4
A3
A2
A1
A0
programmable
slave address
Table 5.
AD2
V
SS
V
SS
V
SS
V
SS
V
DD
V
DD
V
DD
V
DD
V
SS
V
SS
V
SS
V
SS
V
DD
V
DD
V
DD
V
DD
V
SS
V
SS
V
SS
V
SS
V
DD
V
DD
V
DD
V
DD
PCA9674 address map
AD1
AD0
SCL
V
SS
SCL
V
DD
SDA
V
SS
SDA
V
DD
SCL
V
SS
SCL
V
DD
SDA
V
SS
SDA
V
DD
SCL
SCL
SCL
SDA
SDA
SCL
SDA
SDA
SCL
SCL
SCL
SDA
SDA
SCL
SDA
SDA
V
SS
V
SS
V
SS
V
DD
V
DD
V
SS
V
DD
V
DD
V
SS
V
SS
V
SS
V
DD
V
DD
V
SS
V
DD
V
DD
A6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
A4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
A3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
A2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
A1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Address
20h
22h
24h
26h
28h
2Ah
2Ch
2Eh
30h
32h
34h
36h
38h
3Ah
3Ch
3Eh
40h
42h
44h
46h
48h
4Ah
4Ch
4Eh
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