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PIC18F4431-I/P 参数 Datasheet PDF下载

PIC18F4431-I/P图片预览
型号: PIC18F4431-I/P
PDF下载: 下载PDF文件 查看货源
内容描述: 28 /40/ 44引脚增强型闪存微控制器采用纳瓦技术,高性能PWM和A / D [28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D]
分类和应用: 闪存微控制器
文件页数/大小: 392 页 / 3127 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC18F2331/2431/4331/4431  
FIGURE 18-4:  
PWM TIME BASE BLOCK DIAGRAM  
PTMR Register  
PTMR Clock  
Timer Reset  
Up/Down  
Zero Match  
Comparator  
Timer  
Direction  
Control  
PTDIR  
Period Match  
PTMOD1  
Comparator  
PTPER  
Duty Cycle Load  
Period Load  
PTPER Buffer  
Update Disable (UDIS)  
Zero Match  
Period Match  
PTMOD1  
Clock  
Control  
PTMR Clock  
PTEN  
PTMOD0  
Prescaler  
1:1, 1:4, 1:16, 1:64  
FOSC/4  
Zero Match  
Postscaler  
1:1-1:16  
Interrupt  
Control  
PTIF  
Period Match  
PTMOD1  
PTMOD0  
The PWM time base can be configured for four different  
modes of operation:  
These four modes are selected by the PTMOD<1:0>  
bits in the PTCON0 register. The Free-Running mode  
produces edge-aligned PWM generation. The  
Continuous Up/Down Count modes produce  
center-aligned PWM generation. The Single-Shot  
mode allows the PWM module to support pulse control  
of certain Electronically Commutated Motors (ECMs)  
and produces edge-aligned operation.  
• Free-Running mode  
• Single-Shot mode  
• Continuous Up/Down Count mode  
• Continuous Up/Down Count mode with interrupts  
for double updates  
2010 Microchip Technology Inc.  
DS39616D-page 177