Regarding register read and write access for CC2520 through SPI

HI

Iam trying to read SRCMATCH read by using offset address aand getting correct reset value 0x07

but Iam not getting correct values for the other registers like say for CHIPID, iam getting 0x00(which should be 0x84)

So may i seek any help on this.

It would be great if i get to know generic process for read/write for this cc2520 module

Thanks

Prabhat