V-Series Transceiver PHY IP Core User Guide

ID 683171
Date 7/26/2022
Public
Document Table of Contents

7.8. XAUI PHY Analog Parameters for Arria II GX, Cyclone IV GX, HardCopy IV and Stratix IV Devices

This section describes parameters for the Arria II GX, Cyclone IV GX, and Stratix IV devices; specify your analog options on the Analog Options tab.
Table 86.  PMA Analog Options
Name Value Description
Transmitter termination resistance

OCT_85_OHMS

OCT_100_OHMS

OCT_120_OHMS

OCT_150_OHMS

Indicates the value of the termination resistor for the transmitter.
Transmitter VOD control setting 0–7 Sets VOD for the various TX buffers.
Pre-emphasis pre-tap setting 0–7 Sets the amount of pre-emphasis on the TX buffer. Available for Stratix IV.
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. Available for HardCopy IV and Stratix IV devices.
Pre-emphasis first post-tap setting 0–15 Sets the amount of pre-emphasis for the 1st post-tap.
Pre-emphasis second post-tap setting 0–7 Sets the amount of pre-emphasis for the 2nd post-tap. Available for HardCopy IV and Stratix IV devices.
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. Available for HardCopy IV and Stratix IV devices.
Receiver common mode voltage

Tri-state

0.82V

1.1v

Specifies the RX common mode voltage.
Receiver termination resistanc

OCT_85_OHMS

OCT_100_OHMS

OCT_120_OHMS

OCT_150_OHMS

Indicates the value of the termination resistor for the receiver. Cyclone IV supports 100 and 150.
Receiver DC gain 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. Available for HardCopy IV and Stratix IV devices.