Altera UG-01080 Betriebsanweisung Seite 34

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Seitenansicht 33
3–12 Chapter 3: 10GBASE-R PHY IP Core
Data Interfaces
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
Table 311 provides the mapping from the XGMII TX interface to the XGMII SDR
interface.
rx_data_ready
[<n>-1:0]
Output
When asserted, indicates that the PCS is sending data to the MAC. Because the
readyLatency
on this Avalon-ST interface is 0, the MAC must be ready to
receive data whenever this signal is asserted. After
rx_ready
is asserted
indicating the exit from the reset state, the MAC should store
xgmii_rx_dc_
<n>
[71:0]
in each cycle where
rx_data_ready<n>
is asserted.
xgmii_rx_clk
Output
This clock is generated by the same reference clock that is used to generate the
transceiver clock. Its frequency is 156.25 MHz. Use this clock for the MAC
interface to minimize the size of the FIFO between the MAC and SDR XGMII RX
interface.
rx_coreclkin
Input
When you turn on Create
rx_coreclkin
port, this signal is available as a
156.25 MHz clock input port to drive the RX datapath interface (RX read FIFO).
Serial Interface
rx_serial_data_<n>
Input
Differential high speed serial input data using the PCML I/O standard. The clock
is recovered from the serial data stream.
tx_serial_data_<n>
Output
Differential high speed serial input data using the PCML I/O standard. The clock
is embedded from the serial data stream.
Table 3–10. SDR XGMII TX Inputs (Part 2 of 2)
Signal Name Direction Description
Table 3–11. Mapping from XGMII TX Bus to XGMII SDR Bus
Signal Name XGMII Signal Name Description
xgmii_tx_dc_[7:0] xgmii_sdr_data[7:0]
Lane 0 data
xgmii_tx_dc_[8] xgmii_sdr_ctrl[0]
Lane 0 control
xgmii_tx_dc_[16:9] xgmii_sdr_data[15:8]
Lane 1 data
xgmii_tx_dc_[17] xgmii_sdr_ctrl[1]
Lane 1 control
xgmii_tx_dc_[25:18] xgmii_sdr_data[23:16]
Lane 2 data
xgmii_tx_dc_[26] xgmii_sdr_ctrl[2]
Lane 2 control
xgmii_tx_dc_[34:27] xgmii_sdr_data[31:24]
Lane 3 data
xgmii_tx_dc_[35] xgmii_sdr_ctrl[3]
Lane 3 control
xgmii_tx_dc_[43:36] xgmii_sdr_data[39:32]
Lane 4 data
xgmii_tx_dc_[44] xgmii_sdr_ctrl[4]
Lane 4 control
xgmii_tx_dc_[52:45] xgmii_sdr_data[47:40]
Lane 5 data
xgmii_tx_dc_[53] xgmii_sdr_ctrl[5]
Lane 5 control
xgmii_tx_dc_[61:54] xgmii_sdr_data[55:48]
Lane 6 data
xgmii_tx_dc_[62] xgmii_sdr_ctrl[6]
Lane 6 control
xgmii_tx_dc_[70:63] xgmii_sdr_data[63:56]
Lane 7 data
xgmii_tx_dc_[71] xgmii_sdr_ctrl[7]
Lane 7 control
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