PCA9502 Ver la hoja de datos (PDF) - NXP Semiconductors.

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Fabricante

PCA9502

8-bit I/O expander with I2C-bus/SPI interface

NXP Semiconductors. 

NXP Semiconductors

PCA9502

8-bit I/O expander with I2C-bus/SPI interface

protocol

START

condition

(S)

bit 7

MSB

(A7)

bit 6

(A6)

SCL

SDA

tSU;STA

tBUF

tLOW tHIGH

1/fSCL

tr

tf

bit 0

LSB

(R/W)

acknowledge

(A)

STOP

condition

(P)

tSP

tHD;STA

Rise and fall times refer to VIL and VIH.

Fig 13. I2C-bus timing diagram

tSU;DAT tHD;DAT

tVD;DAT

tVD;ACK

tSU;STO

002aab489

SDA

GPIOn

Fig 14. Write to output

SLAVE ADDRESS W A A IOSTATE REG. A

DATA

A

td1

002aab255

SDA

ACK from slave

ACK from slave

SLAVE ADDRESS W A A IOSTATE REG. A S SLAVE ADDRESS R A

ACK from master

DATA

AP

IRQ

GPIOn

Fig 15. GPIO pin interrupt

td4

td5

002aab877

PCA9502_3

Product data sheet

Rev. 03 — 13 October 2006

© NXP B.V. 2006. All rights reserved.

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