To program TQ2440, we connect the debug serial port to PC, and use a serial terminal program called SecureCRT.

Turn on TQ2440, and observe the serial port output:

NOR boot mode

Mine is 7”, and you use 3” if you have a 3″ screen:

Uboot programmed to NAND:

NAND boot:

Now done, press r to reboot, leave boot jumper in “boot from NAND” position: