I want to use these pins as gpio,
After set the fuse register value with is 0b11 as below.
I still could not set these pins with ALT5 mode. After I write value 0x05 to these register, then i found theses registers sitll 0x00.
I want to know is there some others reigsters should be set ?
pls refer to the link as below:
https://community.nxp.com/t5/i-MX-Processors/mx6ul-tamper-pin-to-gpio/m-p/485974
The definition of TAMPER_PIN_DISABLE[1:0] are
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.
The u-boot command to read TAMPER_PIN_DISABLE is
=> fuse read 0 3
If bit [21:20] is 11, then all the ten tamper pins are programmed to GPIO mode.
what chip are you talking about?
Oh, I'm sorry, the chip I use is i.MX6ULL.