PCA9531 Philips Semiconductors (Acquired by NXP), PCA9531 Datasheet - Page 4
PCA9531
Manufacturer Part Number
PCA9531
Description
8-bit I2C Led Dimmerthe PCA9531 is an 8-bit i C And Smbus I/o Expander Optimized For Dimming Leds in 256 Discrete Steps For Red/green/blue (RGB) Color Mixing And Back Light Applications. The PCA9531 Contains an Internal Oscillator With Two User Progr
Manufacturer
Philips Semiconductors (Acquired by NXP)
Datasheet
1.PCA9531.pdf
(20 pages)
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Philips Semiconductors
BLOCK DIAGRAM
2003 Nov 10
8-bit I
RESET
SDA
SCL
V
V
DD
SS
2
C LED dimmer
PCA9531
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
PCA9531
SW02040
Product data
LEDx
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