TSB81BA3E CNA pin output problem

Matthew Chiu

Other Parts Discussed in Thread: TSB81BA3E

I face a problem.

While I use 1394 is not link, the TSB81BA3E pin 79 CNA should be present high level.

However, my board is show a high-low-high-low output.

while 1394 is link, that pin show low level normally and working all fine.

Do you have any idea why CNA pin output high-low data while 1394 is absent?

Many thanks for the help

BRs

Matthew

0 Elias Villegas M. over 14 years ago

Hello Matthew,

Can you take some scope catures of the TPBIAS and CNA signals when the problem is present, also when the cable is connected to one of the ports?

Does the problem is fixed after a power cycle?

Are you configuring the ports as bilingual?

Regards.

0 Matthew Chiu over 14 years ago in reply to Elias Villegas M.

If I have only use Port 0 and Port 1, Port 2 is left no connecting.

Is that right or am I need to terminate Port 2?

BRs

Matthew

0 Matthew Chiu over 14 years ago in reply to Matthew Chiu

I have fix the problem by setting unused port in the single mode.

BRs

Matthew

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