Intel Cyclone 10 GX User Manual page 72

Figure 17. Framing Layer Metaframe Format
The framing control words include:
• Synchronization (SYNC)—for frame delineation and lane alignment (deskew)
• Scrambler State (SCRM)—to synchronize the scrambler
• Skip (SKIP)—for clock compensation in a repeater
• Diagnostic (DIAG)—provides per-lane error check and optional status message
To form a metaframe, the Enhanced PCS frame generator inserts the framing control
words and encapsulates the control and data words read from the TX FIFO as the
metaframe payload.
Figure 18. Interlaken Synchronization and Scrambler State Words Format
Figure 19. Interlaken Skip Word Format
The DIAG word is comprised of a status field and a CRC-32 field. The 2-bit status is
defined by the Interlaken specification as:
• Bit 1 (Bit 33): Lane health
— 1: Lane is healthy
— 0: Lane is not healthy
• Bit 0 (Bit 32): Link health
— 1: Link is healthy
— 0: Link is not healthy
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Intel Cyclone 10 GX Transceiver PHY User Guide
72
2. Implementing Protocols in Intel Cyclone 10 GX Transceivers
Metaframe Length
bx10 b011110
bx10 b001010
66 63
bx10 b000111 h21E
66 63 58 57
Control and
Data Words
h0F678F678F678F6
Scrambler State
58 57
h1E h1E h1E
48 47 40
UG-20070 | 2018.09.24
0
h1E h1E h1E
0
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