AnsweredAssumed Answered

KL17 ROM BOOTLOADER not responding

Question asked by Thomas Morrison on Jul 26, 2017
Latest reply on Jul 31, 2017 by Kerry Zhou



First time for this forum newbie, I couldn't find a satisfactory answer while looking through

the this forum, so I figured I should ask.


Up to this point, I've been using the Kinetis Design Studio & a SEGGER J-Link JTAG interface

to update the application in the Flash. But, for field operations, I need to be able to update the

application using the ROM Bootloader. 


I just started testing this feature, and as the subject line goes, I get ping response using

the blhost or KinetisFlashTool interfaces (note: tools version is 2.0.0). 


More details: 

   1) I have NMI(BOOTCFG0) Line asserted

   2) I turn on power to the KL17...

   3) I get nothing out serial port. 

   4) If I then de-assert NMI line at this point and the user application starts up.

   5) If I try to use blhost.exe to ping, nothing happens?



   a) Am I doing something wrong

   b) when I power-up with NMI/(BOOTCFG0)  asserted, should I get any output

   c) What should happen if I de-assert NMI/(BOOTCFG0) after powering up with it on?

   d) What can I do differently?