Hi, I would like to know about TAMPER_PIN_DISABLE.
I use i.mx6ull CPU, so I referenced IMC6ULLRM.pdf
According to the manual, definition of TAMPER_PIN_DISABLE[1:0] are as following :
00 - enabled, TAMPER0-9 used as TAMPER detection pins.
01 - disabled, TAMPER2-4 and TAMPER7-9 used as GPIO.
10 - disabled, TAMPER0-1 and TAMPER5-6 used as GPIO.
11 - disabled, TAMPER0-9 used as GPIO.
(these are copied from Yuri's answer at mx6ul tamper pin to gpio )
When I did "fuse read 0 3", I got 10 at [21:20].
It means that TAMPER0-1 and TAMPER5-6 used as GPIO.
How about TAMPER2-4 and TAMPER7-9?
Do they work as tamper detection pins?
"enabled" is written only when fuse is 00, so I confused.
Hi Hirotoshi
in i.MX6ULL Tamper0 - 9 can not be used as tamper pins,
they are disabled via fusing during production. Can be used only as GPIOs.
Best regards
igor
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Thank you very much for your quick answer.
Do you intend that we can not transit RUN mode from SNVS mode?
Actually now my board can not run whatever I do after shutdown by "poweroff" command.
Only solution I found is removing CPU from my board and reconnect it.
I think my board entered SNVS mode even though there are no tamper pins.
May that case possible? If so, I think I have to remove VDD_SNVS_IN in order not to enter SNVS mode.