Altera Transceiver PHY IP Core Manual de usuario Pagina 177

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Signal Name Direction Description
pll_locked Output In multilane Interlaken designs, this signal is the
bitwise AND of the individual lane pll_locked signals.
This output is synchronous to the phy_mgmt_clk
clock domain.
tx_sync_done Output
When asserted, indicates that all tx_parallel_data
lanes are synchronized and ready for valid user data
traffic. The Interlaken MAC must wait for this signal
to be asserted before initiating valid user data transfers
on any lane. This output is synchronous to the tx_
coreclkin clock domain. For consistent tx_sync_
done performance, Altera recommends using tx_
coreclkin and rx_coreclkin frequency of lane (data
rate/40).
You must invoke a hard reset using mgmt_rst_reset
and phy_mgmt_clk_reset to initiate the synchroniza‐
tion sequence on the TX lanes.
After tx_sync_done is asserted, you must never allow
the TX FIFO to underflow, doing so requires you to
hard reset to the Interlaken PHY IP Core.
For Quartus versions prior to 12.0, you must pre-fill
the TX FIFO before tx_sync_done can be asserted.
Use the following Verilog HDL assignment for
Quartus II releases prior to 12.0:
assign tx_parallel_data[65] = (!tx_sync_
done)?1'b1:tx_datain_bp[0];
Interlaken PHY Avalon-ST RX Interface
This section lists the signals in the Avalon-ST RX interface.
Table 7-5: Avalon-ST RX Signals
Signal Name Direction Description
rx_parallel_data<n>
[63:0]
Output Avalon-ST data bus driven from the RX PCS to the FPGA
fabric. This output is synchronous to the rx_coreclkin clock
domain.
7-10
Interlaken PHY Avalon-ST RX Interface
UG-01080
2015.01.19
Altera Corporation
Interlaken PHY IP Core
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