Hi,
Our customer is using DS80PCI800, so please let me know changed items in detail from Datasheet Revision E to F, and from F to G.
Particularly, what is RATE pin tied 1kohm to VDD function changed to 'Reserved' for ?
Best Regards,
Kato
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Hi,
Our customer is using DS80PCI800, so please let me know changed items in detail from Datasheet Revision E to F, and from F to G.
Particularly, what is RATE pin tied 1kohm to VDD function changed to 'Reserved' for ?
Best Regards,
Kato
Hi Kato-san,
Originally, the DS80PCI800 RATE pin had an option to Tie a 1kOhm to VDD in order to force the output driver to behave as a linear Gen-3 buffer with de-emphasis. During the last revision, it was discovered that doing this also puts the Signal Detect function internally into a slow turn-on/turn-off mode to activate the channel. When the Signal Detect is in this slow mode, it causes the DS80PCI800 to violate the PCIe spec. Therefore, if you require the linear Gen-3 buffer, we recommend keeping the RATE pin as FLOAT.
Apologies for the confusion.
Thanks,
Michael
Michael - san,
Thank you for the explanation.
DS80PCI800 is used in our customer's Current Equipment as Gen3 with DEM.
If RATE pin is tied 1kohm to VDD, do we have to persuade customer to change RATE pin setting ? We won't be able to make it.
Best Regards,
Kato
Hi,
Thank you for the reply. For already finished and fabbed equipmets, customer has no choice but to leave RATE tied 1kohm to VDD.
So, would you please provide us with explanatory materials ?
Best Regards,
Kato
Hi Kato-san,
I was able to obtain some explanatory material late last week that may be some help. I will continue correspondence with you offline via e-mail.
Thanks,
Michael