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Visible to Intel only — GUID: tiy1673393575783
Ixiasoft
5.1.6.11.3. SMTG Hub Integration with the HPS and FPGA
There are three EMACs available in the HPS and each of the EMAC consists of a SMTG hub connected to XGMAC through the MDIO interface. The hub integration with the XGMAC includes the MDIO interface connection and TS capture signal connections to Aux TS[0] capture input of the XGMAC. The XGMAC’s gpo[0] provides a level signal to indicate that the hub needs to generate the TS capture signal (internal and external).
Each hub has two TS capture channels to capture the TS from the HPS system timer and FPGA’s ToD counter. A 65-wire bus is used to connect each time source (HPS system timer and FPGA’s ToD counter) to the hub. It encompasses the 64-bit TS streaming data and associated clock.
Refer to the following link for the SMTG hub programing guidelines.