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3–22 Chapter 3: 10GBASE-R PHY IP Core
TimeQuest Timing Constraints
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
Table 317 describes the signals in the reconfiguration interface. This interface uses
the Avalon-MM PHY Management interface clock.
TimeQuest Timing Constraints
The timing constraints for Stratix IV GT designs are in alt_10gbaser_phy.sdc. If your
design does not meet timing with these constraints, use LogicLock
TM
for the
alt_10gbaser_pcs
block. You can also apply LogicLock to the
alt_10gbaser_pcs
and
slightly expand the lock region to meet timing.
h For more information about LogicLock, refer to About LogicLock Regions in Quartus II
Help.
Example 3–3 provides the Synopsys Design Constraints File (.sdc) timing constraints
for the 10GBASE-R IP Core when implemented in a Stratix IV device. To pass timing
analysis, you must decouple the clocks in different time domains. Be sure to verify the
each clock domain is correctly buffered in the top level of your design. You can find
the .sdc file in your top-level working directory. This is the same directory that
includes your top-level .v or .vhd file.
Table 3–17. Reconfiguration Interface
Signal Name Direction Description
reconfig_to_xcvr [(<n>70-1):0]
Input
Reconfiguration signals from the Transceiver Reconfiguration
Controller. <n> grows linearly with the number of
reconfiguration interfaces. This signal is only available in
Stratix V devices.
reconfig_from_xcvr [(<n>46-1):0]
Output
Reconfiguration signals to the Transceiver Reconfiguration
Controller. <n> grows linearly with the number of
reconfiguration interfaces. This signal is only available in
Stratix V devices.
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