PCA9553 データシートの表示（PDF） - Philips Electronics
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PCA9553 Datasheet PDF : 18 Pages
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Philips Semiconductors
4-bit I2C LED driver with programmable blink rates
Product data sheet
PCA9553
BLOCK DIAGRAM
PCA9553
SCL
SDA
INPUT
FILTERS
I2C-BUS
CONTROL
INPUT
REGISTER
LED SELECT (LSx)
REGISTER
VDD
POWER-ON
RESET
OSCILLATOR
VSS
PRESCALER 0
REGISTER
PRESCALER 1
REGISTER
0
1
PWM0
REGISTER
PWM1
REGISTER
BLINK0
BLINK1
NOTE: ONLY ONE I/O SHOWN FOR CLARITY
Figure 2. Block diagram
LEDx
SW01036
2004 Oct 01
3
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