MKL27Z128VFT4 Bootloader issue

[waynelin]

Dear

I use FRDM-KL27Z to develop the application code , all function "can normal work on FRDM-KL27Z" but download to MKL27Z128VFT4 USB function will fail, after check NXP commnuities the KL27Z128 should develop on FRDM-KL43Z so i transfer the USB Lib to my project, now USB worked but "USB Bootloader mode fail".

Could tell me how to fix.

Test :

1. Use KSDK2.0 FRDM-KL27Z --> USB function OK, bootloader OK --> download the code to MKL27Z128VFT4 --> USB fail, Bootloader OK

2.USE KSDK2.0 FRDM-KL43Z --> download to MKL27Z128VFT4 --> USB OK, Bootloader fail

3. recovery to FRDM-KL27Z code and download to MKL27Z128VFT4 --> USB fail , bootloader OK.

[ethan_cheng]

Hi Wayne,

Once you download KSDK2.0 FRDM-KL43 into MKL27Z128VFT4, the default boot mode will be changed to boot from flash.

If you want to boot from ROM, please modify BOOTSRC_SEL field in the FOPT register of Flash Configuration to be "10".

The attched is for your reference.