WSTRB signal

Hi can anyone help me in, that how to calculate WSTRB signal for AXI3.

In reply to APJ kalam:
https://developer.arm.com/documentation/ihi0022/e/AMBA-AXI3-and-AXI4-Protocol-Specification

Thanks Dave,

The formula for the WSTRB is WDATA[(8n)+7:(8n)].Where WSTRB is corresponds to WDATA.
But in my case when I’m doing for fixed burst I’m only getting 3 for some WSTRB signal and not getting C for some WSTRB.