Hii.MX6ULL TAMPER pin

[ban45]

Hi

I heard from the community that if the TAMPER pin is not used, pull-up or pull-down processing is performed with 1 MΩ. Not listed in the data sheet.
① Why do you add 1MΩ?
⓶ Please tell me the reason why 10kΩ is not good.
At 1MΩ, the impedance becomes high and it is considered to be vulnerable to noise.
③What is the problem if the resistor is not mounted?
Please teach ① ~ ③.

best regard

[igorpadykov]

Hi ban45

i.MX6ULL has not tamper functionality, pins are configured as gpios.

In general you are right - to make more noise resistive, pull-up or pull-down

can be lower value if needed for example 10kΩ. Reason for high value

is to reduce power consumption (current through pull resistor).

If external resistor is not mounted, gpio can be configured as input with internal

pull resistor.

Best regards
igor