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Won't boot from NAND flash at cold temp

Jared7
Prodigy 140 points

I have a DM6446 (Industrial part) design that does not seem to be booting from NAND flash at cold temperatures (-20C) even though the BTSEL pins are set to boot from NAND.  If the board is reset or powered on around -1C it will boot from NAND flash.  When it is either reset or powered on at cold, I only get "BOOTME" out the serial port.  It appears that either the DaVinci failed to boot from flash, or it somehow misread the BTSEL pins are only tried to boot from the UART.

Additionally, if I boot up at "warm" (-1C) I can boot into U-Boot, and access the flash without issue.  Then taking the board cold (-20C) I can still access the flash via U-Boot.  But when I reset (either from the U-Boot console or by toggling the reset pin) it fails to boot from the nand flash.

Has anyone seen this issue?

Thanks!