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PCA9537DP датащи(PDF) 14 Page - NXP Semiconductors

номер детали PCA9537DP
подробное описание детали  4-bit I2C-bus and SMBus low power I/O port with interrupt and reset
PDF  24 Pages
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производитель  NXP [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA9537DP датащи(HTML) 14 Page - NXP Semiconductors

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PCA9537_5
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 7 May 2009
14 of 24
NXP Semiconductors
PCA9537
4-bit I2C-bus and SMBus low power I/O port with interrupt and reset
Fig 12. Definition of timing
tSP
tBUF
tHD;STA
P
P
S
tLOW
tr
tHD;DAT
tf
tHIGH
tSU;DAT
tSU;STA
Sr
tHD;STA
tSU;STO
SDA
SCL
002aaa986
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
002aab285
tSU;STO
protocol
START
condition
(S)
bit 7
MSB
(A7)
bit 6
(A6)
bit 1
(D1)
bit 0
(D0)
1 / fSCL
tr
tVD;DAT
acknowledge
(A)
STOP
condition
(P)
Fig 14. Definition of RESET timing
SDA
SCL
002aad732
trst
50 %
30 %
50 %
50 %
50 %
trec(rst)
tw(rst)
RESET
IOn
after reset,
I/Os reconfigured
as inputs
START
trst
ACK or read cycle



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