Kontron mITX-BDW-U User Manual page 70

Function
PEG ASPM
Program PCIe ASPM later than
OpROM
De-emphasis Control
Swing Control
PEG Sample Calibrate
Gen3 Equalization
PEG Gen3 Equalization Phase2
Gen3 Root Port Preset
Gen3 Endpoint Preset
Gen3 Endpoint Hint
Gen3 Eq Preset Search
Always re-search Gen3 Eq
Preset
Allow PREST# GPIO Usage
Preset Search Dwell Time
Timing Start Margin
Voltage Start Margin
Error Target
PEG RxCEM Loopback Mode
PEG Gen3 RxCTLE Control
Generate BDAT PEG Margin Data
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Selection Description
Disabled PEG ASPM Settings.
L0S
L1
L0S And L1
Auto
Disabled Enabled: PCIe ASPM will be programmed after
Enabled OpROM. Disabled: PCIe ASPM will be programmed
before OpROM
-6 dB DeEmphasis control for PEG.
-3.5 dB
Reduced Perform PEG Swing Control.
Half
Full
Disabled Enable/Disable PEG Sample Calibrate.
Enabled
Auto
Disabled Perform PEG Gen3 Equalization steps.
Enabled
Disabled Enable/Disable PEG Gen3 Equalization Phase2.
Enabled
1, 2, ...8, ...11 Root Port Preset value for Gen3 Equalization.
0, 1, ...7, ...10 Endpoint Preset value for Gen3 Equalization.
0, 1, 2, ...10 Endpoint Hint value for Gen3 Equalization.
Disabled Perform PEG Gen3 SW Preset Search algorithm.
Enabled
Disabled Always re-search PEG Gen3 Preset even it has been
Enabled done once.
Disabled Enable/Disable GPIO-based resets to PEG
Enabled endpoint(s) during margin search, if needed.
0, ...1000, ...65535 PEG Gen3 Preset Search dwell time in [ms].
4, ...15, ...255 The starting value [4...255] for the backward margin
search.
4, ...20, ...255 The starting value [4...255] for the backward margin
search.
0, 1, ...65535 The margin search error target value [1 ... 65535].
Disabled Enable/Disable PEG RxCEM Loopback Mode.
Enabled
0, ...8, ...255 PEG Gen3 RxCTLE for Bundle0(Lane0, Lane1).
Disabled Enable to generate BDAT PCIe margin tables
Enabled
mITX-BDW-U – User Guide, Rev. 1.6
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