Each PWM in most of the NuMicro? series consists of an 8-bit prescaler, a 1/2/4/8/16 frequency divider and two 16-bit timers. However, each PWM in the M451 series consists of an 12-bit prescaler and two 16-bit timers.

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:

The absolute accuracy formula is: N - log2 (EA), wherein EA refers to the absolute error; N refers to converter bits. The linearity formula is: N - log2 (INL), wherein INL refers to the Integral nonlinearity error; N refers to converter bits. Refer to the ADC electrical characteristics chapter in th...

For all NuMicro? series, the VREF pin must be connected with an external capacitor, and its capacitance value needs to limit power supply ripple to be less than one LSB of ADC to avoid power noise to interfere with ADC accuracy. For example, if the 12-bit ADC and VREF voltage is 3.3V, the size of th...

The GPIO power in the NuMicro? M451 series is divided into three parts: In addition to PE.8 - PG.13 and PF.0 - PN.2, VDD provides all GPIO operating voltage. In accordance with the needs of the application, the VDD voltage range can be set as 2.5V - 5.5V. For PE.8 - PE.13, the GPIO operating voltage...

Yes, it is easy to configure the SPI registers for setting the idle polarity of serial clock, the clock edges to transmit and receive data to match the general SPI mode 0 - 3.

When the flag CAPIFx (Capture interrupt event flag) is set by hardware, the value of CNR register will be loaded into the down counter.

Depending on the NuMicro? series, the PWM generator in some chips must have at least one count for high level or low level pulse width within the cycle of the entire PWM output waveform.
The NUC131, M0518 and M451 series support the entire output signal to be high level or low level.

The Dead Zone generator of PWM is used for MOSFET protection, especially for the motor driver system to avoid both of the top and bottom MOSFET to be turned on simultaneously.

For some NuMicro? Cortex-M series chips, such as M451/NUC131/M0518 series, the PWM clock frequency can be set to twice the CPU operating frequency (HCLK). In M451 series, for example, referring to the following PWM block diagram, the PWM clock frequency can be set to twice the HCLK frequency by sett...