Altera Transceiver PHY IP Core Manual do Utilizador Página 40

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Signal Name Direction Description
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 3-11: 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
3-16
10GBASE-R PHY Data Interfaces
UG-01080
2015.01.19
Altera Corporation
10GBASE-R PHY IP Core
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