Visible to Intel only — GUID: yzz1673393439466
Ixiasoft
Visible to Intel only — GUID: yzz1673393439466
Ixiasoft
5.1.6.1.3. Descriptor Cache Memory
Descriptor cache memory is an external SPRAM. The XGMAC uses the descriptor memory interface (DMI) to read and write the pre-fetched descriptors of all the DMA activities into the descriptor cache memory.
The descriptor cache memory size is 4 KB and the memory is internally stored per the data width, which is 8 bytes (64 bits). 4096 bytes x 1 B memory is physically stored as 512 x 8 B memory which results in 9 bits of address width.
Descriptor cache memory is synchronous to the application clock (aclk_i).