PCA9558 查看數據表（PDF） - Philips Electronics

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产品描述 (功能)

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PCA9558

8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit latched 6-bit I2C EEPROM and 2 k bit EEPROM

Philips Electronics 

Philips Semiconductors

8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit

latched 6-bit I2C EEPROM and 2 k bit EEPROM

Product data

PCA9558

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

S 1 0 0 1 1 1 A0 0 A 0 0 0 0 x x x x A d7 d6 d5 d4 d3 d2 d1 d0 A P

SLAVE ADDRESS

See Figure 2 for the proper Command Byte

COMMAND BYTE

R/W

DATA BYTE

Figure 7. I2C write for GPIO registers

SW00637

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

NO ACKNOWLEDGE

FROM MASTER

S 1 0 0 1 1 1 A0 0 A 0 0 0 0 x x x x A S 1 0 0 1 1 1 A0 1 A d7 d6 d5 d4 d3 d2 d1 d0 NA P

SLAVE ADDRESS

R/W

COMMAND BYTE

SLAVE ADDRESS

R/W

Figure 8. I2C read for GPIO registers

DATA FROM SLAVE

SW00638

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

NO ACKNOWLEDGE

FROM MASTER

S 1 0 0 1 1 1 A0 0 A 0 0 0 0 1 1 0 0 A S 1 0 0 1 1 1 A0 1 A 0 0 0 d4 d3 d2 d1 d0 NA P

SLAVE ADDRESS

R/W

COMMAND BYTE

SLAVE ADDRESS

R/W

Figure 9. I2C read of MUX_INx inputs

DATA FROM SLAVE

SW00639

2002 May 24

8

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