User guide

3–6 Chapter 3: 10GBASE-R PHY IP Core
Parameter Settings
Altera Transceiver PHY IP Core March 2012 Altera Corporation
User Guide
Stratix V Devices
You specify the analog parameters for Stratix V devices using the Quartus II
Assignment Editor, the Pin Planner, or through the Quartus II Settings File (.qsf). The
default values for analog options fall into three categories:
■ Global— These parameters have default values that are independent of other
parameter settings.
■ Computed—These parameters have an initial default value that is recomputed
based on other parameter settings.
■ Proxy—These parameters have default values that are place holders. The
Quartus II software selects these initial default values based on your design;
however, Altera recommends that you replace these defaults with values that
match your electrical board specification.
Pre-emphasis pre-tap setting 0–7 Sets the amount of pre-emphasis on the TX buffer.
Invert the pre-emphasis pre-tap
polarity setting
On
Off
Determines whether or not the pre-emphasis control signal for the
pre-tap is inverted. If you turn this option on, the pre-emphasis
control signal is inverted.
Pre-emphasis first post-tap
setting
0–15 Sets the amount of pre-emphasis for the 1st post-tap.
Pre-emphasis second post-t ap
setting
0–7 Sets the amount of pre-emphasis for the 2nd post-tap.
Invert the pre-emphasis second
post-tap polarity
On
Off
Determines whether or not the pre-emphasis control signal for the
second post-tap is inverted. If you turn this option on, the
pre-emphasis control signa is inverted.
Receiver common mode voltage
Tri-State
0.82V
1.1v
Specifies the RX common mode voltage.
Receiver
termination resistance
OCT_85_OHMS
OCT_100_OHMS
OCT_120_OHMS
OCT_150_OHMS
Indicates the value of the termination resistor for the receiver.
Receiver DC
0–4
Sets the equalization DC gain using one of the following settings:
■ 0–0 dB
■ 1–3 dB
■ 2–6 dB
■ 3–9 dB
■ 4–12 dB
Receiver static equalizer setting: 0–15
This option sets the equalizer control settings. The equalizer uses a
pass band filter. Specifying a low value passes low frequencies.
Specifying a high value passes high frequencies.
Table 3–6. PMA Analog Options (Part 2 of 2)
Name Value Description