pca9532bs NXP Semiconductors, pca9532bs Datasheet - Page 11

• Manufacturer Part Number: pca9532bs
• Description: 16-bit I2c Led Dimmer
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Programming example
The following example will show how to set LED0 to LED3 on. It will
then set LED4 and LED5 to blink at 1 Hz at a 50% duty cycle. LED6
and LED7 will be set to be dimmed at 25% of their brightness (duty
cycle = 25%). LED8 to LED15 will be set to off.
Table 1.
2004 Oct 01
Start
PCA9532 address with A0–A2 = LOW
PSC0 subaddress + auto-increment
Set prescaler PSC0 to achieve a period of 1 second:
Set PWM0 duty cycle to 50%:
Set prescaler PCS1 to dim at maximum frequency
Set PWM1 output duty cycle to 25%:
Set LED0 to LED3 on
Set LED4 and 5 to PWM0, and LED6 or 7 to PWM1
Set LED8 to LED11 off
Set LED12 to LED15 off
Stop
16-bit I
PWM0
PWM1
256
256
Blink period
Blink period
PWM0 = 128
PWM1 = 64
2
PSC0 = 151
0.5
0.25
C LED dimmer
PSC1 = 0
1
maximum
PSC0
152
1
I
S
C0h
12h
97h
80h
00h
40h
55h
FAh
00h
00h
P
2
C-bus
11
PCA9532
Product data sheet