USB 3.0 voltage swing tunning

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USB 3.0 voltage swing tunning

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pavel_drabek
Contributor I

How I can tune voltage swing to pass USB 3.0 compliance?

I am getting only: PeakToPeakVoltage (5G) (Short Channel) [32241] 63.3 mV, while Pass Limits: [100.0 mV to 1.2000 V]

Thank you.

Best regards

Pavel

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pavel_drabek
Contributor I

OK, got it, this is the magic:

1) Boot linux

2) memtool 0x5b198004=0x3f

3) memtool 0x5b198030=0x03

4) Plug USB fixture and conduct measurements

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pavel_drabek
Contributor I

OK, got it, this is the magic:

1) Boot linux

2) memtool 0x5b198004=0x3f

3) memtool 0x5b198030=0x03

4) Plug USB fixture and conduct measurements

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