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CAT9532YI Datasheet(PDF) 11 Page - ON Semiconductor

Part # CAT9532YI
Description  16-bit Programmable LED Dimmer with I2C Interface
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
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CAT9532YI Datasheet(HTML) 11 Page - ON Semiconductor

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CAT9532
External Reset Operation
The CAT9532 registers and the I
2C state machine are
initialized to their default state when the RESET input
is held low for a minimum of tW. The external Reset
timing is shown in Figure 9.
Power-On Reset Operation
The CAT9532 incorporates Power-On Reset (POR)
circuitry which protects the internal logic against
powering up in the wrong state. The device is in a
reset state for VCC less than the internal POR
threshold level (VPOR). When VCC exceeds the VPOR
level, the reset state is released and the CAT9532
internal state machine and registers are initialized to
their default state.
Figure 8. Read Input Port Register Timing Diagram
11
0
0
A2
A1 A0
READ FROM
PORT
DATA INTO
PORT
SDA
SA
A
DATA 1
DATA 4
Slave Address
Data From Port
Data From Port
Start Condition
R/W
Acknowledge
From Slave

Acknowledge
From Master

Stop
Condition
tps
DATA 4
DATA 2
P
DATA 3
tph
NA
DATA 1
No

Acknowledge
From Master
Figure 9. RESET
¯¯¯¯¯¯ Timing Diagram
SDA
SCL
tRESET
tRESET
50%
30%
50%
50%
50%
tREC
tW
RESET
LEDx
LED OFF
ACK OR READ CYCLE
START
© 2010 SCILLC. All rights reserved
11
Doc. No. MD-9001 Rev. E
Characteristics subject to change without notice


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