DS90UB954-Q1: BIST - forward channel speed + AEQ

Jason Lo

Part Number: DS90UB954-Q1

When running BIST on a DS90UB954 / DS90UB953 setup...

- Is the forward channel data rate always the maximum speed, about 4 Gbps? (using synchronous mode with 25 MHz reference)

- Is the AEQ algorithm active still in the event channel lock is lost during BIST?

over 3 years ago

0 Joshua Horlander Cruz over 3 years ago

TI__Mastermind 19020 points

Hello Jason,

Let me investigate these questions and I will get back to you by August 2nd at the latest.

Thank you,

Joshua

0 Jason Lo over 3 years ago in reply to Joshua Horlander Cruz

Prodigy 250 points

Thank you, I look forward to your response.

+1 Joshua Horlander Cruz over 3 years ago

TI__Mastermind 19020 points

Hi Jason,

Jason Lo said:
Is the forward channel data rate always the maximum speed, about 4 Gbps? (using synchronous mode with 25 MHz reference)

Yes the forward channel is always at 4 Gbps even while in BIST, this can be verified by checking the RX_FREQ_HIGH and RX_FREQ_LOW registers on the DES

Jason Lo said:
Is the AEQ algorithm active still in the event channel lock is lost during BIST?

While BIST is active the AEQ will still be active and continuously trying to recover lock if it is lost.

Best regards,

Joshua

0 Jason Lo over 3 years ago in reply to Joshua Horlander Cruz

Prodigy 250 points

Thank you!

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DS90UB954-Q1: BIST - forward channel speed + AEQ