Altera 10-Gbps Ethernet MAC MegaCore Function - Manual (Page 88)

Chapter 7: Functional Description 7–21
IEEE 1588v2
February 2014 Altera Corporation 10-Gbps Ethernet MAC MegaCore Function User Guide
Figure 7–12 shows the timing for the XGMII TX interface transmitting the remote fault
signal (0x9c000002).
When you instantiate the MAC RX only variation, connect the
link_fault_status_xgmii_rx_data
signal to the corresponding RX client logic to
handle the link fault. Similarly, when you instantiate the MAC TX only variation,
connect the link_fault_status_xgmii_tx_data signal to the corresponding TX client
logic. For more information on the signals, refer to
“SDR XGMII Signals” on page 9–8 .
1
The 1G/10GbE MAC does not support error handling through link fault. Instead, the
MAC uses the gmii_rx_err signal.
7.9. IEEE 1588v2
The IEEE 1588v2 option provides time stamp for receive and transmit frames in the
10GbE MAC IP core designs. The feature consists of Precision Time Protocol (PTP).
PTP is a layer-3 protocol that accurately synchronizes all real time-of-day clocks in a
network to a master clock.
Figure 7–12. XGMII TX interface Transmitting Remote Fault Signal
tx_clk_clk
xgmii_tx_data[71]
xgmii_tx_data[70:63]
xgmii_tx_data[62]
xgmii_tx_data[61:54]
xgmii_tx_data[53]
xgmii_tx_data[52:45]
xgmii_tx_data[44]
xgmii_tx_data[43:36]
xgmii_tx_data[35]
xgmii_tx_data[34:27]
xgmii_tx_data[26]
xgmii_tx_data[25:18]
xgmii_tx_data[17]
xgmii_tx_data[16:9]
xgmii_tx_data[8]
xgmii_tx_data[7:0]
02
00
00
9C
02
00
00
9C