Altera Transceiver PHY IP Core Manual do Utilizador Página 259

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TX PLL (0–3)
(Refer to
Low Latency PHY General Options
for a detailed explanation of these parameters.)
Reference clock frequency Variable Specifies the frequency of the PLL input
reference clock. The PLL must generate an
output frequency that equals the Base data
rate/2. You can use any Input clock
frequency that allows the PLLs to generate
this output frequency.
Selected reference clock source 0–4 Specifies the index of the input clock for this
TX PLL. Logical index 0 corresponds to
input clock 0 and so on.
Channel Interface
Enable Channel Interface On/Off Turn this option on to enable PLL and
datapath dynamic reconfiguration. When
you select this option, the width of tx_
parallel_data and rx_parallel_data
buses increases in the following way.
Standard datapath:
The tx_parallel_data bus is 44 bits per
lane; however, only the loworder number
of bits specified by the FPGA fabric
transceiver interface width contain valid
data for each lane.
The rx_parallel_data bus is 64 bits per
lane; however, only the loworder number
of bits specified by the FPGA fabric
transceiver interface width contain valid
data.
10G datapath:
The both the tx_parallel_data and rx_
parallel_data buses are 64 bits per
lane; however, only the loworder number
of bits specified by the FPGA fabric
transceiver interface width contain valid
data.
Related Information
PLL Reconfiguration on page 16-33
General Options Parameters on page 10-4
Low Latency PHY Analog Parameters
For analog parameters refer to Analog Settings for Stratix V Devices.
10-12
Low Latency PHY Analog Parameters
UG-01080
2015.01.19
Altera Corporation
Low Latency PHY IP Core
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