Beagleboard
 

Can i change ARM processor in beagleboard. I mean if wanna use ARM processor from TI and sometime from NXP
then can i do lke that.

No. The chip is mostly software compatible, but otherwise is not replaceable. Why would you want to do that anyway?
--- rod.

If i buy it then it may that i wanna change my processor that why.
But i did not understand "The chip is mostly software compatible". Can you elaborate.

There are many different flavors of ARM CPUs. Each has its own subtle differences. Some use different types of floating point processors, some have slightly different instruction sets, and all of the on-chip peripherals are arranged differently, and controlled differently. If you build a cross toolchain for an ARM architecture host, you will quickly see how the number of permutations grows. Much the same configuring a kernel.

--- rod.