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PCA9502 Datasheet(PDF) 16 Page - NXP Semiconductors

No. de pieza PCA9502
Descripción Electrónicos  8-bit I/O expander with I2C-bus/SPI interface
PDF  25 Pages
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Fabricante Electrónico  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCA9502 Datasheet(HTML) 16 Page - NXP Semiconductors

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PCA9502_3
© NXP B.V. 2006. All rights reserved.
Product data sheet
Rev. 03 — 13 October 2006
16 of 25
NXP Semiconductors
PCA9502
8-bit I/O expander with I2C-bus/SPI interface
Rise and fall times refer to VIL and VIH.
Fig 13. I2C-bus timing diagram
SCL
SDA
tHD;STA
tSU;DAT
tHD;DAT
tf
tBUF
tSU;STA
tLOW
tHIGH
tVD;ACK
002aab489
tSU;STO
protocol
START
condition
(S)
bit 7
MSB
(A7)
bit 6
(A6)
bit 0
LSB
(R/W)
acknowledge
(A)
STOP
condition
(P)
1/fSCL
tr
tVD;DAT
tSP
Fig 14. Write to output
002aab255
A
W
SDA
A
GPIOn
DATA
A
IOSTATE REG.
SLAVE ADDRESS
A
td1
Fig 15. GPIO pin interrupt
002aab877
A
W
SDA
A
R
IRQ
td4
S
A
DATA
A
ACK from master
SLAVE ADDRESS
IOSTATE REG.
SLAVE ADDRESS
A
td5
GPIOn
P
ACK from slave
ACK from slave



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