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AM3358-EP: How to change the status of F17 pin on power up

Part Number: AM3358-EP


I am using Sitara AM3358BGCZA80EP with  processor_sdk_rtos_am335x_6_01_00_08. I have configured F17 pin as PWM to control the brightness of Led. As this pin  is active pull up on power up so due this by default led is glowing but I need low condition on power up. Kindly suggest any solution to to this so that it should not affect the functionality. 

If I make external pull down then voltage will get divide and it will affect the brightness.

As this pin includes functionality of MMC_DAT3 so if I include MMC in booting list, will it become low by ROM bootloader.

SYSBoot[4:0] = 10011b;