pca9674a NXP Semiconductors, pca9674a Datasheet - Page 7

• Manufacturer Part Number: pca9674a
• Description: Remote 8-bit I/o Expander For Fm+ I2c-bus With Interrupt
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Product data sheet
PCA9674_PCA9674A_2
7.1.1 Address maps
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
PCF8574A is applied.
Table 5.
AD2
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Fig 8. PCA9674/74A address
SS
SS
SS
SS
DD
DD
DD
DD
SS
SS
SS
SS
DD
DD
DD
DD
SS
SS
SS
SS
DD
DD
DD
DD
AD1
SCL
SCL
SDA
SDA
SCL
SCL
SDA
SDA
SCL
SCL
SDA
SDA
SCL
SCL
SDA
SDA
V
V
V
V
V
V
V
V
PCA9674 address map
SS
SS
DD
DD
SS
SS
DD
DD
AD0
V
V
V
V
V
V
V
V
SCL
SDA
SCL
SDA
SCL
SDA
SCL
SDA
V
V
V
V
V
V
V
V
SS
DD
SS
DD
SS
DD
SS
DD
SS
DD
SS
DD
SS
DD
SS
DD
Rev. 02 — 12 October 2006
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
Remote 8-bit I/O expander for Fm+ I
A6
A5
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
programmable
slave address
A4
DD
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
or V
A2
SS
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
, the same address as the PCF8574 or
A1
A0
002aab636
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
R/W
PCA9674/74A
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
2
C-bus with interrupt
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
© NXP B.V. 2006. All rights reserved.
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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