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PCA9552 Datasheet(PDF) 18 Page - NXP Semiconductors

Part # PCA9552
Description  16-bit I2C-bus LED driver with programmable blink rates
PDF  28 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCA9552 Datasheet(HTML) 18 Page - NXP Semiconductors

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PCA9552_5
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 05 — 9 March 2006
18 of 28
Philips Semiconductors
PCA9552
16-bit I2C-bus LED driver with programmable blink rates
Fig 19. Definition of timing on the I2C-bus
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 20. I2C-bus timing diagram
SCL
SDA
tHD;STA
tSU;DAT
tHD;DAT
tf
tBUF
tSU;STA
tLOW
tHIGH
tVD;ACK
002aab175
tSU;STO
protocol
START
condition
(S)
bit 7
MSB
(A7)
bit 6
(A6)
bit 0
(R/W)
acknowledge
(A)
STOP
condition
(P)
1/fSCL
tr
tVD;DAT
Fig 21. Reset timing
SDA
SCL
002aac193
trst
50 %
30 %
50 %
50 %
50 %
trec(rst)
tw(rst)
RESET
LEDn
LED off
START
trst
ACK or read cycle



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