PCA9539RPW 查看數據表（PDF） - NXP Semiconductors.

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PCA9539RPW

16-bit I2C-bus and SMBus low power I/O port with interrupt and reset

NXP Semiconductors. 

NXP Semiconductors

PCA9539; PCA9539R

16-bit I2C-bus and SMBus low power I/O port with interrupt and reset

6. Functional description

Refer to Figure 1 “Block diagram of PCA9539; PCA9539R”.

6.1 Device address

slave address

1 1 1 0 1 A1 A0 R/W

fixed

programmable

002aad724

Fig 5. PCA9539; PCA9539R device address

6.2 Registers

6.2.1 Command byte

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 byte

Command Register

0

Input port 0

1

Input port 1

2

Output port 0

3

Output port 1

4

Polarity inversion port 0

5

Polarity inversion port 1

6

Configuration port 0

7

Configuration port 1

PCA9539_PCA9539R_5

Product data sheet

Rev. 05 — 28 July 2008

© NXP B.V. 2008. All rights reserved.

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