[T10] [SPL-4] Query regarding SPL Packet Synchronization

Lana Chan lana at cadence.com
Thu Feb 9 09:14:22 PST 2017


Hello,
I have a question regarding SPL Packet Synchronization

Reference 1 - In Spl4Rev08, in Packet Mode Train Rx SNW (Speed Negotiation Window), page no. 231, it indicates

If the PHY's receiver:

a)      Achieves SPL packet synchronization within the TLT, then, after completing transmission of the current PACKET_SYNC_LOST, the PHY shall change from transmitting PACKET_SYNC_LOSTs to transmitting PACKET_SYNCs for the remainder of the Train_Rx-SNW window time (i.e., the remainder of the SNW time); or

b)      Does not achieve SPL packet synchronization within the TLT, then the phy shall continue transmitting PACKET_SYNC_LOSTs for the remainder of the MRTT (i.e., the remainder of the SNW time).

Reference 2 - In Spl4Rev08, Section - 5.14.4.10
>From the SP Phy Layer state machine, Start PS message(which starts SPL Packet Synchronization state machine) is enabled after Phy_Ready.

Question:
Which SPL packet synchronization is the specification talking about in Train-Rx SNW ?

Kind Regards
Lana
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