pca9535ecmttxg ON Semiconductor, pca9535ecmttxg Datasheet - Page 7

• Manufacturer Part Number: pca9535ecmttxg
• Description: Pca9535e, Pca9535ec 16-bit Low-power I/o Expander For I2c Bus With Interrupt
• Manufacturer: ON Semiconductor

Device Address
send the address of the slave it is accessing and the operation
it wants to perform (read or write) following a START
condition. The slave address of the PCA9535E and
PCA9535EC is shown in Figure 5. Address pins AD2, AD1,
and AD0 choose 1 of 64 slave addresses. To conserve power,
no internal pull−up resistors are provided on AD2, AD1, and
AD0.
operation while a logic 0 selects a write operation.
Table 6. PCA9535E AND PCA9535EC ADDRESS MAP
Before the bus master can access a slave device, it must
A logic 1 on the last bit of the first byte selects a read
GND
GND
GND
GND
VDD
VDD
VDD
VDD
GND
GND
GND
GND
VDD
VDD
VDD
VDD
GND
GND
GND
GND
VDD
VDD
VDD
VDD
GND
GND
GND
GND
VDD
VDD
VDD
AD2
Address Input
GND
GND
GND
GND
GND
GND
GND
GND
SDA
SDA
SDA
SDA
SDA
SDA
SDA
SDA
VDD
VDD
VDD
VDD
VDD
VDD
VDD
AD1
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
AD0
SDA
SDA
SDA
SDA
SDA
SDA
SDA
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
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
0
0
0
0
0
0
0
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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
1
1
1
1
1
1
1
7
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
0
0
0
0
0
0
0
Figure 5. PCA9535E and PCA9535EC Device Address
A6
A3
Slave Address
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
A5
A4
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
0
0
0
0
1
1
1
programmable
slave address
A3
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
0
0
1
1
0
0
1
A2
A1
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
0
1
0
1
0
1
0
A0
HEX
2Ah
2Ch
2Eh
3Ah
3Ch
3Eh
4Ah
4Ch
4Eh
5Ah
5Ch
20h
22h
24h
26h
28h
30h
32h
34h
36h
38h
40h
42h
44h
46h
48h
50h
52h
54h
56h
58h
R/W