topic Re: Inquiry Kinetis manual in Kinetis Microcontrollers

Inquiry Kinetis manual

lim — Mon, 15 Nov 2021 01:22:00 GMT

Hi NXP

I found a Flash Security (FSEC) register difference on manual

AN4507 - Kinetis manual

7 6 5 4 3 2 1 0

KEYEN MEEN FSLACC SEC

KEA64RM - KEA64RM manual

7 6 5 4 3 2 1 0

KEYEN Reserved SEC

Can't we use a MEEN register on a KEA64RM ?

can i know which register is correct?

Re: Inquiry Kinetis manual

nxf56274 — Mon, 15 Nov 2021 02:31:26 GMT

Hi,

The mcu RM is more accurate than the application note. So if the kea64 RM doesn't describe the bit, we shouldn't use it.

Have a great day,

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Re: Inquiry Kinetis manual

lim — Mon, 15 Nov 2021 05:15:42 GMT

Thank you very mcuh.!

Re: Inquiry Kinetis manual

lim — Mon, 15 Nov 2021 07:18:51 GMT

I have an additional question.

AN4507 - Kinetis manual

Mass erase is disabled (MEEN 10)

I want use a mass erase disabled function on KEA64

but on KEA64RM MEEN is reserved , so we can't use that function on KEA64?

Re: Inquiry Kinetis manual

nxf56274 — Mon, 15 Nov 2021 07:58:55 GMT

Hi,

Yeah, you are right

Re: Inquiry Kinetis manual

lim — Tue, 16 Nov 2021 00:30:06 GMT

Mass erase is disabled (MEEN 10)

Is there any other way to disable that function?

Thank you

Re: Inquiry Kinetis manual

nxf56274 — Wed, 17 Nov 2021 02:21:51 GMT

Hi,

May be you can refer the FPROT. It can protect the flash from programming and erasing.

BR,

Re: Inquiry Kinetis manual

lim — Wed, 17 Nov 2021 05:44:23 GMT

Thank you

if we enable the FPROT , mass erase is still working right? (JTAG)

Re: Inquiry Kinetis manual

nxf56274 — Wed, 17 Nov 2021 06:53:07 GMT

Hi,

Yes. You can also try to use the backdoor key to set the flash as security to avoid being erased.