Hi SK,
BDM interface is necessary to develop, debug and program ColdFire V1 chip.
if you use NXP demo board, there is a BDM debug interface integrated on board, thus you don't need purchase a BDM emulator separately.
If you develop a customized Coldfire v1 board, you need have a BDM emulator.
User can also develop a bootloader, for example serial bootloader to program board. but BDM emulator is still needed to program bootloader into board first.
Is this clear for you?
Have a great day,
Jennie Zhang
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