All of the GPIO pins can generate external interrupts and all of them can be set as the sources to wake up the chip from Idle or Power-down mode.

Yes, but it depends on the part No. The measurement frequency will be Fin/2^1 to Fin/2^16, where Fin is the input clock frequency to the clock divider. Please check the pin configuration and get further information in the related Technical Reference Manual. Please refer to the following flow to meas...

Yes, all the series except the NUC1xxAN series provide the flag, OSC22M_STB, in the CLKSTATUS register to ensure the internal (HIRC) clock is stable. Please refer to the related Technical Reference Manual for further information. Please add the following marked code after the internal clock is enabl...

The NuMicro® Nano120 /130 series can use an external low-speed oscillator (LXT) to ensure the accuracy HIRC of to 0.25%, which is compliant with the USB specification. The NuMicro® NUC121/125 series can use USB SOF(Start of Frame) to ensure the accuracy HIRC of to 0.25%. The other NuMicro® series ne...

In Idle mode, only the CPU clock is disabled.
In Power-down mode, most clocks are disabled except the internal 10 kHz and the external 32.768 kHz clocks.
As such, the RTC, WDT, Timer and PWM peripheral clocks are still enabled.

No, but most of GPIO are the multifunction pins.
Please refer to the Pin Description section in the Product brief, Datasheet or Technical Reference Manual for NuMicro® family each series.

The default state of GPIO after reset may vary depending on the product series. The state of GPIO for M051 BN and NUC100 Series is in Quasi-bidirectional mode with weakly pull-high resistor (110 kΩ~300 kΩ), and the state of GPIO for Mini51 and Nano100 Series is in Input mode. However, the state of G...

The Timer interrupt event flag (TIF) will be set by hardware when the value of 24-bit up-counting Timer counter matches the setting of TCMPR (Timer Compare Register).
This flag needs software to write 1 to clear it.

The Continuous Counting Operation mode means that the Timer will continuously count from zero to 2^24-1 and restart to zero again. Each time the Timer interrupt event flag (TIF) is set by the hardware and the interrupt signal is generated when the value of 24-bit up-counting Timer counter matches th...

In Periodic Operation mode, the Timer will reset the 24-bit Timer counter and restart to count from 0 when each time the value of 24-bit up-counting Timer counter matches the setting of TCMPR (Timer Compare Register). At this moment, the Timer interrupt event flag (TIF) will be set by hardware and t...