pca9555bs NXP Semiconductors, pca9555bs Datasheet - Page 6

• Manufacturer Part Number: pca9555bs
• Description: 16-bit I2c And Smbus I/o Port With Interrupt
• Manufacturer: NXP Semiconductors

NXP Semiconductors
6. Functional description
PCA9555_7
Product data sheet
6.2.1 Command byte
6.1 Device address
6.2 Registers
Refer to
The command byte is the first byte to follow the address byte during a write transmission.
It is used as a pointer to determine which of the following registers will be written or read.
Table 4.
Command
0
1
2
3
4
5
6
7
Fig 8. PCA9555 device address
Figure 1 “Block diagram of
Command byte
Register
Input port 0
Input port 1
Output port 0
Output port 1
Polarity Inversion port 0
Polarity Inversion port 1
Configuration port 0
Configuration port 1
Rev. 07 — 5 June 2007
0
1
fixed
PCA9555”.
slave address
16-bit I
0
0
2
programmable
A2
C-bus and SMBus I/O port with interrupt
A1
002aac219
A0
R/W
PCA9555
© NXP B.V. 2007. All rights reserved.
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