
Chapter 9: Custom PHY IP Core 9–13
Analog Parameters
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
Analog Parameters
Click on the appropriate link to specify the analog options for your device:
■ Analog Settings for Arria V Devices
■ Analog Settings for Cyclone V Devices
■ Analog Settings for Stratix V Devices
Presets for Ethernet
Presets allow you to specify a group of parameters to implement a particular protocol
or application. If you apply the presets for GIGE-1.25 Gbps or GIGE–2.5 Gbps,
parameters with specific required values for those protocols are set for you. Selecting
a preset does not prevent you from changing any parameter to meet the requirements
of your design. Table 9–10 lists the parameters that are set for the GIGE-1.25 Gbps or
GIGE–2.5 Gbps protocols.
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.
■ The
tx_parallel_data
bus is 44 bits per lane; however, only
the low-order 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 low-order number of bits specified by the FPGA fabric
transceiver interface width contain valid data.
Table 9–9. PLL Reconfigurations
Name Value Description
Table 9–10. Presets for Ethernet Protocol (Part 1 of 2)
Parameter Name GIGE-1.25 Gbps GIGE-2.50 Gbps
General Options Tab
Parameter validation rules GIGE GIGE
Enable bonding Off Off
FPGA fabric transceiver interface
width
816
PCS-PMA Interface Width 10 10
Data rate 1250 Mbps 3125 Mbps
Input clock frequency 62.5 MHz 62.5 MHz
Enable TX Bitslip Off Off
Create rx_coreclkin port Off Off
Create tx_coreclkin port Off Off
Create rx_recovered_clk port Off Off
Create optional ports Off
Off
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