Tx Pma Bonding - Intel Stratix 10 User Manual

3. Intel Stratix 10 E-Tile Transceiver PHY Architecture
UG-20056 | 2019.02.04
Figure 44. RX Data Flow
Simplified blocks. The gearbox is indicated in red.
Native PHY IP Core
The TX PMA interface FIFO is in the datapath for all modes of operation such as:
• PMA direct
• PMA direct high data rate PAM4 modes
• EHIP_LANE
• EHIP_CORE
• RS-FEC
The two TX FIFO modes are elastic or phase compensation. Elastic mode is identical to
Basic mode in Intel Stratix 10 L/H-tiles where you can monitor the FIFO full or empty
and almost full or empty signals. The control FIFO writes and reads through the read
and write enable ports.
Refer to Supported Applications/Modes for more details about these modes, and refer
to the PMA Interface section for more details about the E-Tile Native PHY PMA
Interface.
Related Information
• Supported Applications/Modes
• PMA Interface

3.1.6. TX PMA Bonding

TX bonding enables you to minimize skew between channels.
Enable bonding by selecting the Enable TX PMA bonding option in the TX PMA tab
of the Native PHY IP GUI. You can only bond channels within the same transceiver tile
(24 channels). The transceiver Native PHY IP core does not support reconfiguration
between bonded and non-bonded channel configurations.
The Native PHY IP core restricts the maximum number of channels to 24 for bonded
configuration and provides an information message to notify you of the restriction. The
fitter enforces the placement restriction to make sure all the bonded channels yield a
valid placement.
When you enable TX PMA bonding, the maximum channel-to-channel skew is 2 UI +
125 ps.
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Core Interface EMIB
FIFO FIFO
on page 36
50/100GbE & 1588
10/25GbE
RS-FEC
Data from four
other channels
on page 21
® ®
Intel Stratix
PMA Interface
FIFO
GB
PMA
10 E-Tile Transceiver PHY User Guide
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