According to different NuMicro™ series chips, there are several available PWM clock source options, including the internal RC oscillator, external crystal, HCLK, PCLK and PLL.

The NuMicro™ M0/M4 series and their corresponding clock sources are listed in detail as follows:

NuMicro™ M0/M4 Series	HIRC	LIRC	HXT	LXT	HCLK	PCLK	PLL
Mini51 Series						√
M051 Series	√	√	√		√
NUC100/120 Series	√	√	√	√	√
NUC122 Series	√		√	√	√
NUC123 Series	√	√	√		√
NUC130/140 Series	√		√	√	√
NUC200/220 Series	√	√	√	√	√
NUC230/240 Series	√	√	√	√	√
NUC131 Series						√	√
M0518 Series						√	√
NUC442/472 Series	√	√	√	√		√
M451 Series						√	√
NUC505 Series			√				√
Nano100 Series	√		√	√	√
Nano1x2 Series	√		√	√	√

Products:	Microcontrollers ,Arm Cortex-M0 MCUs ,M051 Base Series ,M0518 Series ,Mini51 Base Series ,Nano100/102 Base Series ,Nano110/112 LCD Series ,Nano120 USB Series ,Nano130 Advanced Series ,NUC029 Series ,NUC100/200 Advanced Series ,NUC120/122/123/220 USB Series ,NUC130/230 CAN Series ,NUC131/NUC1311 CAN Series ,NUC140/240 Connectivity Series ,Arm Cortex-M4 MCUs ,M451 Base Series ,M451M Series ,M452 USB Series ,M453 CAN Series ,NUC442/472 Series ,NUC505 Series
Applications:
Function:	Peripherals,Clock Control,HCLK,HIRC,HXT,LIRC,LXT,PLL,Timer and PWM,PWM-Capture,PWM Output

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What can be selected as PWM clock sources? Issue Date：2015-05-07

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