Visible to Intel only — GUID: ebr1522051348696
Ixiasoft
Visible to Intel only — GUID: ebr1522051348696
Ixiasoft
4.2.2.3. IP Core Strict SFD Checking
The H-tile Ethernet Hard IP core RX MAC checks all incoming packets for a correct Start byte (0xFB).
If you turn on Enable strict preamble check in the H-tile Ethernet Hard IP parameter editor, the RX MAC requires all RX packets to have an Ethernet standard preamble (0x55_55_55_55_55_55). If you turn on Enable strict SFD check , the RX MAC requires all RX packets to have an Ethernet standard Start Frame Delimiter (0xD5).
Enable strict SFD check | 0x50A[4]: Preamble Check | 0x50A[3]: SFD Check | Fields Checked | Behavior if Check Fails |
---|---|---|---|---|
Off | Don't Care | Don't Care | Start byte | IP core does not recognize a malformed Start byte as a Start byte |
On | 0 | 0 | Start byte | |
0 | 1 | Start byte and SFD | IP Core drops the packet | |
1 | 0 | Start byte and preamble | ||
1 | 1 | Start byte and preamble and SFD |
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