參數(shù)資料
型號(hào): PCA9550
廠商: NXP Semiconductors N.V.
元件分類: LED驅(qū)動(dòng)器
英文描述: 2-bit I2C LED driver with programmable blink rates
中文描述: 2位I2C LED與可編程閃爍率司機(jī)
文件頁(yè)數(shù): 9/17頁(yè)
文件大小: 130K
代理商: PCA9550
Philips Semiconductors
Product data
PCA9550
2-bit I
2
C LED driver with programmable blink rates
2003 May 02
9
Programming example
The following example will show how to set LED0 to blink at 1 Hz at
a 50% duty cycle. LED1 will be set to blink at 4 Hz, 25% duty cycle.
Table 1.
I
2
C-bus
Start
S
PCA9550 address with A0 = LOW
COh
PSC0 subaddress + auto-increment
11h
Set prescaler PSC0 to achieve a period of 1 second:
Blink period
1
PSC0
1
38
PSC0 = 37
25h
Set PWM0 duty cycle to 50%:
256
PWM0
256
PWM0 = 128
0.5
80h
Set prescaler PCS1 to achieve a period of 0.25
seconds:
Blink period
0.25
PSC1
1
38
PSC1 = 9
09h
Set PWM1 output duty cycle to 25%:
256
PWM1
256
PWM1 = 192
0.25
C0h
Set LED0 to PWM0 and set LED1 to blink at PWM1
OEh
Stop
P
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PCA9550D112 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述:
PCA9550DP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2-bit I2C LED driver with programmable blink rates