topic Re: MK70FN1M0 Micro controller reboots frequently in Kinetis Microcontrollers

MK70FN1M0 Micro controller reboots frequently

marlinx — Wed, 25 Mar 2015 20:15:22 GMT

I am using MK70FN1M0 Micro controller on one of my Board.

Issue i am facing is my MK70FN1M0 board frequently reboots. i can say after every 1 to 2 mins board reboots(time is not fixed it varies).

What could be the issue?? which is causing board to reboot frequently.

Please anybody can give suggestion to solve this issue, ASAP.

Regards

Marlin

Re: MK70FN1M0 Micro controller reboots frequently

Alice_Yang — Thu, 26 Mar 2015 01:58:50 GMT

Hello ,

Please change a USB line to test .

Alice

Re: MK70FN1M0 Micro controller reboots frequently

marlinx — Thu, 26 Mar 2015 13:49:01 GMT

thanks for the quick reply Alice.

Can you Please elaborate "change a USB line to test".

Marlinx

Re: MK70FN1M0 Micro controller reboots frequently

Alice_Yang — Fri, 27 Mar 2015 03:34:53 GMT

Hello ,

Does your board made by yourself , or is the demo board of freesacle TWR-K70 ?

If it is the TWR-K70 of freescale , please update the firmware .

If it is not , there will be some hardware engineer give your some suggestion.

Best Regards,

Alice

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Re: MK70FN1M0 Micro controller reboots frequently

Alice_Yang — Fri, 27 Mar 2015 08:03:51 GMT

Hello ,

I recommend you firstly finding out the reason is software or hardware, so please do like this :

1) create a simple project ,then test it , if it can work well , the problem is your software.

2) it the simple project still make the board reboot , it maybe your board design reason , please check the circuit , maybe the watchdog , maybe some disturb made the mcu reset.

This need analysis your board circuit seriously .

Best Regards,

Alice

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Re: MK70FN1M0 Micro controller reboots frequently

marlinx — Fri, 27 Mar 2015 18:42:22 GMT

Hi Alice,

thanks for the Reply.

the problem is associated with our designed board, Not with demo board.

One more thing i want bring in to your notice that i have couple of MK70FN1M0 boards. Some boards are working without any issues i.e. without any reboot issues.

in some of the boards i am facing this rebooting issue.

even i am thinking the problem is with hardware or software, difficult to figure out!!!

at outer level i think some event is causing reset again and again which is causing system to reboot again and again. first i need to figure out which is source of reset.

Regards

Marlin

Re: MK70FN1M0 Micro controller reboots frequently

xiangjun_rong — Tue, 31 Mar 2015 08:23:37 GMT

Hi, Marlinx,

The rebooting issue is difficult to track, software/hardware both can cause the issue, I am not sure I can solve it.

But i think you can check the RESET status register to know the cause of the rebooting. Pls check the RCM_SRS0 and RCM_SRS1 registers after the rebooting happens, or you can output the two register via Rs232 so that you can know the register when the chip is running.

Pls refer to section 13.2.2 System Reset Status Register 1 (RCM_SRS1) in reference manual of K70 for the bit mapping in the register.

hope it can give a clue.

XiangJun Rong