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PCA9555 Datasheet(PDF) 6 Page - NXP Semiconductors |
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PCA9555 Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 34 page PCA9555_8 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 08 — 22 October 2009 6 of 34 NXP Semiconductors PCA9555 16-bit I2C-bus and SMBus I/O port with interrupt 6. Functional description Refer to Figure 1 “Block diagram of PCA9555”. 6.1 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. Fig 8. PCA9555 device address R/W 002aac219 0 1 0 0 A2 A1 A0 programmable slave address fixed 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 |
Similar Part No. - PCA9555_13 |
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Similar Description - PCA9555_13 |
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