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ACT8849QM411-T 参数 Datasheet PDF下载

ACT8849QM411-T图片预览
型号: ACT8849QM411-T
PDF下载: 下载PDF文件 查看货源
内容描述: [Advanced PMU for Multi-core Application Processors]
分类和应用:
文件页数/大小: 38 页 / 763 K
品牌: ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
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ACT8847  
Rev 5, 15-Nov-12  
PWM LED DRIVERS  
Table 7:  
GPIOx/DUTY[ ] PWM Frequency Setting  
The GPIO3, the GPIO4, the GPIO5, and the GPIO6  
are configured as PWM LED drivers, which could  
support up to 6mA current with programmable  
frequency and duty cycle. Set PWMxEN[ ] bit to “1”  
to enable PWM function of GPIOx.  
GPIOx/DUTY[3:0]  
0000  
PWM Duty Cycle [%]  
6.25  
12.5  
18.75  
25  
0001  
PWM Frequence Selection  
Each LED driver may be independently  
programmed to a different frequency by writing to  
the GPIO’s FRE[2:0] register via the I2C serial  
interface as shown in Table 6.  
0010  
0011  
0100  
31.25  
37.5  
43.75  
50  
Table 6:  
0101  
GPIOx/FRE[ ] PWM Frequency Setting  
0110  
0111  
GPIOx/FRE[2:0]  
PWM Frequency [Hz]  
1000  
56.25  
62.5  
68.75  
75  
000  
001  
010  
011  
100  
101  
0.25  
0.5  
1
1001  
1010  
1011  
2
1100  
81.25  
87.5  
93.75  
100  
128  
256  
1101  
1110  
PWM Duty Cycle Selection  
1111  
Each LED driver may be independently  
programmed to a different duty cycle by writing to  
the GPIO’s DUTY[3:0] register via the I2C serial  
interface as shown in Table 7.  
Innovative PowerTM  
- 36 -  
www.active-semi.com  
Active-Semi ProprietaryFor Authorized Recipients and Customers  
ActivePMUTM is a trademark of Active-Semi.  
I2CTM is a trademark of NXP.  
Copyright © 2012 Active-Semi, Inc.  
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