Xilinx ChipScope Pro User Manual

82 www.xilinx.com ChipScope Pro Software and Cores User Guide
UG029 (v14.3) October 16, 2012
Chapter 4: Using the ChipScope Pro Analyzer
MGT Settings
The MGT Alias setting is initially set to the MGT number of the GTX transceiver, but can
be changed by selecting the field and typing in a new value.
The Tile Location setting denotes the X/Y coordinate of the GTX transceiver in the device.
The MGT Link Status indicator is displays the status of the link detection logic that is
connected to the receiver of a particular GTX transceiver channel. If the channel is linked
(green), the measured line rate is displayed. If the channel is not linked, it displays NOT
LOCKED (red).
The PLL Status indicator shows the lock status of the PLL that is connected to the GTX
transceiver. The valid states of this status indicator are LOCKED (green) or NOT LOCKED
(red).
The Loopback Mode setting is used to control the loopback mode of a particular GTX
transceiver channel. The valid choices for loopback mode are:
• None: No feedback path is used.
• Near-End PCS: The circuit is wholly contained within the near-end GTX transceiver
channel. It starts at the TX fabric interface, passes through the PCS, and returns
immediately to the RX fabric interface without ever passing through the PMA side of
the GTX channel.
• Near-End PMA: The circuit is wholly contained within the near-end GTX transceiver
channel. It starts at the TX fabric interface, passes through the PCS, through the PMA,
back through the PCS, and returns to the RX fabric interface.
• Far-End PMA: The circuit originates and ends at some external channel endpoint (for
example, external test equipment or another device) but passes through the part of the
GTX transceiver channel. For this GTX transceiver loopback mode, the signal comes
into the RX pins, passes through the PMA circuitry, and returns immediately to the TX
pins.
• Far-End PCS: The circuit originates and ends at some external channel endpoint (for
example, external test equipment or another device) but passes through part of the
GTX transceiver channel. For this GTX loopback mode, the signal comes into the RX
pins, passes through the PMA, through the PCS, back through the PMA, and returns
to the TX pins.
The DUAL Reset button resets both GTX transceivers in the DUAL by clearing and
resetting all internal PMA and PCS circuitry as well as the related fabric interfaces.
The Channel Reset button resets the GTX transceiver channel by clearing and resetting all
internal PMA and PCS circuitry as well as the related fabric interfaces.
The TX Polarity Invert setting controls the polarity of the data sent out of the TX pins of the
GTX transceiver channel. To change the polarity of the TX side of the GTX transceiver,
check the TX Polarity Invert box.
The TX Bit Error Inject button inverts the polarity of a single bit in a single transmitted
word. The receiver endpoint of the channel that is connected to this transmitter should
detect a single bit error.
The TX Diff Output Swing combo box controls the differential swing of the transmitter.
Change the value in the combo box to change the swing.
The TX Pre-Emphasis combo box controls the amount of pre-emphasis on the transmitted
signal. Change the value in the combo box to change the emphasis.

Xilinx ChipScope Pro Specifications

General

Brand	Xilinx
Model	ChipScope Pro
Category	Computer Hardware
Language	English