When the CPu enters Idle or Power-down mode, the WWDT will automatically stop counting. Accordingly, the WWDT does not support the wake-up function in Power-down mode.

To avoid system reset when the CPU clock is stopped, the WWDT will automatically stop counting when the CPU enters Idle or Power-down mode. The WWDT will not continue counting until the CPU returns to Normal mode.

The WWDT time-out interval is calculated as follows: Pre-scale Value * Counter Value / FWWDT Pre-scale Value: The pre-scale value Counter Value: The maximum value of the counter, which is a constant 64 FWWDT: Clock source frequency of WWDT There are two kinds of WWDT clock sources for selection: HCL...

The Window Watchdog Timer (WWDT) protects the entire system by restarting the chip when the program is unable to control due to unexpected errors during the execution of the program and the WWDT counter is reset incorrectly. The WWDT has a 6-bit counter, and a settable Reload Window. During operatio...

In DSP operations, when a problem cannot be solved by using an integer, and the floating-point operation spends too much time, the Q format can be used to solve the problem regarding performance and operation time. q31, q15, and q7 use a fixed-point number to represent the bits of fractional part. T...

When the audio source enters the NUC505 series microcontroller (MCU), the source will be converted by an internal ADC first for the NUC505 to process. Then the NUC505 will send a number of data based on user firmware settings. After the processing of DAC codec, the user can hear the audio source thr...

Connect the microphone input with headset control functions (e.g. play/stop, volume increase and decrease) to both the Codec ADC (MIC input) and normal SAR ADC input pins in the NuMicro? NUC505 series. The following figure shows the application circuit connection. The following table shows the SAR A...

Yes. When installing the Nu-Link driver, the user has to specify the directory for development tools (e.g. Keil and IAR) because the directory for different versions of the development tools is different. As shown below, the installation directory for Keil RVMDK UV5 is C:\Keil_v5, and the installati...

The memory architecture used in the NuMicro? microcontroller (MCU) is Flash and its operating procedure can be divided into the following three parts: Erase Page Program Flash Read Verify Flash To update a few data, you need to first backup data on the entire Page to RAM or Flash on different Pages ...

When GPIO is set to I?C mode, Schmitt Trigger is disabled by default. Users have to set GPIO Input Type Control to enable the Schmitt Trigger.

For example, in the NUC240 series, GPA_MFP8 and GPA_MFP9 need to be set to I?C mode.

Then, enable the Schmitt Trigger of GPA_TYPE8 and GPA_TYPE9.