Hi sheshnath chauhan
I already contact you with a mail, did you get it?
Am I correct to assume that you are using FRDM-KW41Z to program a custom board with MKW41Z and SWD pins?
Regards your questions;
1. Is mkw41z always stay in reset mode or any problems here?
MKW41Z is not always in reset mode, if a custom board is been used, please verify the state of the reset with a oscilloscope, and also verify that this pin has a external pullup resistor.
2. Is mkw41z initially in reset mode if yes then how to program if no then whats the problems?
If you are using a new (blank) MCU, then the problem is not the MCU, If there is no code programmed, then the processor will periodically reset due to core lockups, Core try to execute code and when there isn't any code to execute, then it reset.
3. Is mkw41z needs any type of initialization to work ?
No, you should be able to program it even if it is a new device.
4. Is new and blank mkw41z show 0.22v at its reset pin?
As I mentioned in my previous answer, when a MCU is blank, core is constantly resetting, so it is common to see a sawtooth signal in the reset pin, even with this behavior, you should be able to program the device.
Have you seen this post from our colleague?
Using the Freescale Freedom (FRDM-KL43Z) to Debug other Boards
Here, he explain how to use FRDM board to debug other board.
Please verify that you have correctly isolated SWD_CLK signal from the OpenSDA interface to the On board MCU, for FRDM-KW41Z you have the available J12 jumper, please cut this trace to do this.
Hope this information could help you.
Have a great day,
Jorge Alcala
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