JTAG for Tegra K1 custom board

Hi all,
Is it neccessary to include JTAG for a custom board in order to flash OS for the first time to the Tegra K1?
uSD card,eMMC and USB0 recovery options are already available.Can I use one of these options instead of JTAG?
thank you

Hi ishara0925,

The JTAG is mainly designed for debugger purpose.
The general way is to use the flash.sh and tegra_flash.py scripts that included from the driver package.
But, there are many ways to flash the empty Tegra K1 in production environment which depends on your requirement, such as you list.

And clone is also a way to flash device, see clone at:
http://elinux.org/Jetson/Cloning

Thanks