PCA9551 Philips Semiconductors, PCA9551 Datasheet - Page 4

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PCA9551

Manufacturer Part Number
PCA9551
Description
8-bit I2C LED driver with programmable blink rates
Manufacturer
Philips Semiconductors
Datasheet
1.PCA9551.pdf (21 pages)

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Philips Semiconductors
BLOCK DIAGRAM
2004 Oct 01
8-bit I
RESET
SDA
SCL
V
V
DD
SS
2
C LED driver with programmable blink rates
PCA9551
FILTERS
INPUT
OSCILLATOR
POWER-ON
RESET
A2
CONTROL
I
2
C-BUS
A1
A0
NOTE: ONLY ONE I/O SHOWN FOR CLARITY
Figure 3. Block diagram
PRESCALER 0
PRESCALER 1
REGISTER
REGISTER
4
REGISTER
REGISTER
PWM1
PWM0
BLINK0
BLINK1
0
1
LED SELECT (LSx)
REGISTER
REGISTER
INPUT
PCA9551
Product data sheet
SW01015
LEDx

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