PCA9558 Просмотр технического описания (PDF) - NXP Semiconductors.

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производитель

PCA9558

8-bit I2C-bus and SMBus I/O port with 5-bit multiplexed/1-bit latched 6-bit I2C-bus EEPROM DIP switch and 2-kbit EEPROM

NXP Semiconductors. 

NXP Semiconductors

PCA9558

8-bit I2C-bus/SMBus I/O port

slave address

command byte

data byte

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

START condition

R/W acknowledge

from slave

See Table 3 for the proper command byte.

Fig 9. I2C-bus write for GPIO registers

acknowledge

from slave

acknowledge STOP

from slave condition

002aad373

slave address

command byte

slave address

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 (cont.)

START condition

R/W acknowledge

from slave

acknowledge (re)START

from slave condition

R/W acknowledge

from slave

data from slave

(cont.) d7 d6 d5 d4 d3 d2 d1 d0 NA P

Fig 10. I2C-bus read for GPIO registers

no acknowledge STOP

from master condition

002aad374

slave address

command byte

slave address

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 (cont.)

START condition

R/W acknowledge

from slave

acknowledge (re)START

from slave condition

R/W acknowledge

from slave

data from slave

(cont.) 0 0 0 d4 d3 d2 d1 d0 NA P

Fig 11. I2C-bus read of MUX_INx inputs

no acknowledge STOP

from master condition

002aad375

PCA9558_4

Product data sheet

Rev. 04 — 14 April 2009

© NXP B.V. 2009. All rights reserved.

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