Altera Stratix V Avalon-ST Instrukcja Użytkownika Strona 98

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Signal Name Direction Description
link3_ctl[1]
Input Link Control 3 Register bit[1]: Link Equalization Request
Interrupt Enable. When set to 1, enables the generation of an
interrupt to indicate that the Link Equalization Request bit
has been set.
link3_ctl[0]
Input Link Control 3 Register bit [0]. Perform Equalization.
When set to 1, the downstream port must perform equalization.
The following table describes the Configuration Space Bypass signals that are driven from the hard
Configuration Space in the Transaction Layer to the soft Configuration Space implemented in the
Application Layer. In Qsys, the Configuration Space Bypass output signals have the prefix
bypass_out_cfgbp_. In the MegaWizard Plug-In Manager design flow, these signals have the prefix cfgbp_.
All signals are synchronous to pld_clk.
Table 5-13: Configuration Space Bypass Mode Output Signals
Signal Name Direction Description
lane_err[7:0]
Output When a bit is set to 1, indicates a lane error that is reported in the
Lane Error Status Register of the Secondary PCI Express
Extended Capability structure. Bit 0 corresponds to lane 0.
link_equiz_req
Output Reported as Bit 5 in the Link Status 2 Register.
equiz_complete
Output Reported as Bit 1 in the Link Status 2 Register.
phase_3_successful
Output Reported as Bit 4 in the Link Status 2 Register.
phase_2_successful
Output Reported as Bit 3 in the Link Status 2 Register.
phase_1_successful
Output Reported as Bit 2 in the Link Status 2 Register.
current_deemph
Output Current de-emphasis setting reported in the Lin k Status 2
Register.
current_speed[1:0]
Output Current link speed as reported in the Link Status Register.
The following encodings are defined:
2'b01: Gen1
2'b10: Gen2
2'b11: Gen3
link_up
Output When asserted indicates that the link is up and has exited the
Configuration.Idle state.
5-46
Configuration Space Bypass Mode Interface Signals
UG-01097_avst
2014.12.15
Altera Corporation
Interfaces and Signal Descriptions
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