Altera Stratix GX Transceiver Instrukcja Użytkownika Strona 199

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Altera Corporation 6–45
January 2005 Stratix GX Transceiver User Guide
GigE Mode
Figure 6–35. GigE Synchronization Sequence Quartus II Software Simulation Results
Figures 6–36 and 6–37 show the loss of GigE synchronization on receiving
invalid code groups from the SignalTap II logic analyzer and the
Quartus II software, respectively. On receiving four invalid codes that are
separated by fewer than three valid codes, the receiver signals a loss of
synchronization by deasserting the rx_syncstatus signal and sending
a /K28.4/ code group (8’h9C + ctrl). In the example, four invalid
codes are transmitted with zero valid codes in between.
Figure 6–36. Loss of Synchronization SignalTap II Logic Analyzer Results
Figure 6–37. Loss of Synchronization Quartus II Simulation Results
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