CC2538: ZC network address other then 0x0000

You cannot do this.

then what is the use of NWK_PAN_COORD_ADDR in nwk_globals.h

Isn’t it defined to 0x0000?

its defined to 0x0000 but tried another value but still its taking 0x0000

where it is fixed and why it is fixed?

It’s defined by Zigbee spec and implemented in Z-Stack kernel.

how will this make any difference that if ZC network address is other then 0x0000

I couldn’t understand your question.

why they have specified the ZC network address as 0x000 in zigbee specification/karnel , how will it affect the performance of zigbee if they/allow us to set any other network address instead of 0x0000

I don’t know the history of this specific thing and it’s out of scope of this forum. If you have any concern or proposal for Zigbee spec, you can propose it to Zigbee Alliance.