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How to get into bootloader mode ( with a MKL27Z128VLH4 )

Question asked by kicad1978 on Mar 3, 2017
Latest reply on Mar 6, 2017 by Kerry Zhou

Hi! I have a circuit with a MKL27Z128VLH4, and have a hard time understanding the logic to get it into bootloader mode.

The manual http://www.nxp.com/assets/documents/data/en/reference-manuals/KL27P64M48SF6RM.pdf 

states: "When FTFA_FOPT[BOOTPIN_OPT] = 0, it forces boot from ROM if NMI/BOOTCFG0 pin set to 0."

Unfortunately, this is not the case. I have BOOTPIN_OPT as "0" (enabled), and when I pull NMI_b down to

GND, the circuit stays in application mode, and does not turn into bootloader mode. What am I missing here?

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