Signal Name Direction Width Description
gmii16b_tx_latency
Output 22 The latency of the PHY excluding the PMA block on
the TX datapath:
• Bits [21:10]: The number of clock cycles.
• Bits [9:0]: The fractional number of clock
cycles.
This signal is available when only the Enable IEEE
1588 Precision Time Protocol parameter is
selected.
RX GMII signals—synchronous to rx_clkout
gmii16b_rx_d
Output 16 RX data to the MAC. The PHY sends the lower byte
first followed by the upper byte. Rate matching is
done by the PHY on the RX data from the RX
recovered clock to rx_clkout.
gmii16b_rx_err
Output 2 When asserted, indicates an error. Bit[0]
corresponds to gmii16b_rx_err[7:0]; bit[1]
corresponds to gmii16b_rx_err[15:8].
The bits can be asserted at any time during a
frame transfer to indicate an error in the current
frame.
gmii16b_rx_dv
Output 2 When asserted, indicates the start of a new frame.
Bit[0] corresponds to gmii16b_rx_d[7:0]; bit[1]
corresponds to gmii16b_rx_d[15:8].
This signal remains asserted until the PHY sends
the last byte of the data frame.
gmii16b_rx_latency
Output 22 The latency of the PHY excluding the PMA block on
the RX datapath:
• Bits [21:10]: The number of clock cycles.
• Bits [9:0]: The fractional number of clock
cycles.
This signal is available only when the Enable IEEE
1588 Precision Time Protocol parameter is
selected.
2.6.5.4.4. XGMII Signals
The XGMII supports 10GbE at 156.25 MHz.
Table 161. XGMII Signals
Signal Name Direction Width Description
TX XGMII signals—synchronous to xgmii_tx_coreclkin
xgmii_tx_data
Input 64, 32 TX data from the MAC. The MAC sends the data in
the following order: bits[7:0], bits[15:8], and so
forth.
The width is:
• 64 bits for 1G/2.5G/10G configurations.
• 32 bits for 1G/2.5G/5G/10G configurations.
xgmii_tx_control
Input 8, 4 TX control from the MAC:
•
xgmii_tx_control[0] corresponds to
xgmii_tx_data[7:0]
•
xgmii_tx_control[1] corresponds to
xgmii_tx_data[15:8]
• and so forth.
The width is:
continued...
2. Implementing Protocols in Arria 10 Transceivers
UG-01143 | 2018.06.15
Intel
®
Arria
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10 Transceiver PHY User Guide
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