Xilinx LogiCORE IP Spartan-6 Getting Started Manual page 30

Chapter 3: Running the Wizard
Table 3-13
Table 3-13: RX Equalization
Option
Wide Band/High Pass Ratio
Table 3-14
Table 3-14: RX Termination
Option
Disable Internal AC Coupling
Termination Voltage
Table 3-15
Table 3-15: Optional Ports
Option
TXPOLARITY Active-High signal to invert the polarity of the transmitter output.
TXINHIBIT Active-High signal forces transmitter output to steady state.
Active-High reset signal causes the CDR logic to unlock and return to the shared PLL
RXCDRRESET
frequency.
RXPOLARITY Active-High signal inverts the polarity of the receive data signal.
30
describes the RX equalization settings.
Controls the proportion of signal derived from the high pass filter and from the
unfiltered receiver (wide band) when RX Equalization is active. Select a percentage
ratio from the drop down list.
The PCI EXPRESS example uses setting 11 (bypass with gain).
describes the RX termination settings.
Bypasses the internal AC coupling capacitor. Use this option for DC coupling
applications or for external AC coupling.
Selecting GND grounds the internal termination network. Selecting VTTRX applies an
internal voltage reference source to the internal termination network.
The PCI EXPRESS example uses the GND setting.
shows the optional ports available on this page.
www.xilinx.com
Description
Description
Description
Spartan-6 FPGA GTP Transceiver Wizard v1.8
UG546 (v1.8) December 14, 2010