Problem with pin reset on MCU MKL25Z128VLK4.

[sacchettigiampa]

I started a new project with a similar design to Freedom KL25Z OPENSDA, my board not working Correctly, the MKL25Z128VLK4 is always reset, the pin 42 is pulled with 10 K to VCC,

the extern oscillator 8 MHz not clock, the waveform on pin reset (42) is similar to ramp at frequency 32KHz.

[Jorge_Gonzalez · Accepted solution]

Hello:

The signal on the reset pin is normal in new devices. Device is reset because of the watchdog or illegal instruction fault.

To eliminate this, the first thing to do with a new device is a mass erase. There are several options to do a mass erase, depending on the IDE + programming tool you use.

And about the external oscillator, it has to be enabled first by code.

Regards!,
Jorge Gonzalez

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