What is the BOOTMODE of IMXRT1064 if GPIO_AD_B0_04 pin is floating

[geem-guanmian_x]

Hi engineers,

IMXRT1064CVJ5B is using in our prototype.

The GPIO_AD_B0_05 pin is pulled-up but the GPIO_AD_B0_04 pin is floating in hardware.

It is noted in datasheet that there is internal 100k pull-down in GPIO_AD_B0_04 pin while reset.

My question is, what is the BOOT_MODE[1:0] in current hardware? Is it 10 (internal boot type) or not defined? Now the chip can not be boot successfully.

Many thanks

Guanmian Xu

[jeremyzhou · Accepted solution]

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
1) What is the BOOT_MODE[1:0] in current hardware? Is it 10 (internal boot type) or not defined?
-- I think the BOOT_MODE[1:0] should be 10.
The boot-up failure issue can be caused by other factors besides the BOOT_MODE[1:0] setting, and I'd like to suggest adding an extern pull-down resistor to the GPIO_AD_B0_04 pad to get rid of any input noise interferences.
Have a great day.
TIC

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