ChipScope Pro Software and Cores User Guide
87
UG029 (v14.3) October 16, 2012
ChipScope Pro Analyzer Features
MGT/BERT Settings Panel
The
MGT/BERT Settings
panel contains a table that is made up of one or more vertical
columns and horizontal rows. Each column represents a specific active GTX transceiver.
Each row represents a specific control or status setting.
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
TX PLL Status
indicator shows the lock status of the TX PLL that is connected to the
GTX transceiver. The valid states of this status indicator are LOCKED (green) or NOT
LOCKED (red).
The
RX PLL Status
indicator shows the lock status of the RX 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.
•
Far-End Fabric: The circuit originates and ends at some external channel endpoint (for
example, external test equipment or another device) but passes through the entire
GTX transceiver channel and related fabric logic. For this GTX transceiver loopback
mode, the signal comes into the RX pins, passes through the PMA and PCS, through a
shallow fabric-based FIFO, back through the PCS and PMA, and finally returns to the
TX pins.
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.
