SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The WBUF MISR is used to indirectly provide coverage for a majority of EVE logic. The EVE-level EDMA can be used to perform memcopy operation between a given source memory range and a WBUF memory address range and thus the WBUF MISR. The source buffer contains known values that are either the interim results of a VCOP self-test, or simply initialized to a known data pattern to provide interconnect level coverage. This is repeated for the necessary paths in the EVE subsystem to provide indirect coverage for those paths.
It is possible to reserve a portion of WBUF memory for the write data accesses during the self-test operation. The necessary reserved address space can be minimized by using EDMA constant mode transfers, which require a minimum of 32 bits of reserved space.