PCA9550 Philips Semiconductors, PCA9550 Datasheet - Page 3
PCA9550
Manufacturer Part Number
PCA9550
Description
2-bit I2C LED driver with programmable blink rates
Manufacturer
Philips Semiconductors
Datasheet
1.PCA9550.pdf
(17 pages)
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Philips Semiconductors
BLOCK DIAGRAM
2003 May 02
2-bit I
RESET
SDA
SCL
V
V
DD
SS
2
C LED driver with programmable blink rates
PCA9550
FILTERS
INPUT
OSCILLATOR
POWER-ON
RESET
CONTROL
I
2
C-BUS
A0
NOTE: ONLY ONE I/O SHOWN FOR CLARITY
Figure 2. Block diagram
PRESCALER 0
PRESCALER 1
REGISTER
REGISTER
3
REGISTER
REGISTER
PWM1
PWM0
BLINK0
BLINK1
0
1
LED SELECT (LSx)
REGISTER
REGISTER
INPUT
PCA9550
SW00927
Product data
LEDx
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