PCA9553 Philips Semiconductors, PCA9553 Datasheet - Page 3
PCA9553
Manufacturer Part Number
PCA9553
Description
4-bit I2C LED driver with programmable blink rates
Manufacturer
Philips Semiconductors
Datasheet
1.PCA9553.pdf
(18 pages)
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Philips Semiconductors
BLOCK DIAGRAM
2004 Oct 01
4-bit I
SDA
SCL
V
V
DD
SS
2
C LED driver with programmable blink rates
PCA9553
FILTERS
INPUT
OSCILLATOR
POWER-ON
RESET
CONTROL
I
2
C-BUS
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
PCA9553
Product data sheet
SW01036
LEDx
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