XIO2001 Schematic Review

Stephen Matson

Other Parts Discussed in Thread: XIO2001

Is it possible to have someone review my XIO2001 schematics? Just would like a quick check to make sure I'm not missing anything obvious. The application is an add-in card. Moving an existing PCI design to PCIe.

Thank you,

Steve

over 9 years ago

0 Elias Villegas M. over 9 years ago

TI__Guru* 76130 points

Hello,

No problem, just attach it here or post an email address and we'll contact you if you prefer.

Regards.

0 Stephen Matson over 9 years ago in reply to Elias Villegas M.

Prodigy 40 points

Hello Elias. Thank you very much for your assistance. The XIO2001 page is attached.

Best regards,

Steve

xio2001.pdf

0 Elias Villegas M. over 9 years ago in reply to Stephen Matson

TI__Guru* 76130 points

Hello,

Few comments:

1. Terminal 84 is VDD_PLL and must be isolated from the rest of the 1.5V terminals.

2. Each one of the VCCP requires a 1k resistor.

3. Control the power-up de-assertion of terminal GRST#, you can use a passive RC circuit to create the desired delay, refer to power-up sequence described on datasheet.

4. You have a short circuit on SCL and SDA.

Everything else looks correct, review the Implementation guide at ti.com regarding the layout recommendations.

Regards

0 Stephen Matson over 9 years ago in reply to Elias Villegas M.

Prodigy 40 points

Elias-

Thank you for your time and feedback.

Best regards,

Steve

0 Stephen Matson over 9 years ago in reply to Stephen Matson

Prodigy 40 points

Elias-

One additional question. What is the value of the internal pull-up on GRST#? How tightly controlled is this value? Or is this a current source? Trying to understand a safe value for the external capacitor for timing.

Why is this RC not included on the EVM?

Thank you.

Best regards,

Steve

0 Elias Villegas M. over 9 years ago in reply to Stephen Matson

TI__Guru* 76130 points

Hello,

I'll need to ask Design team about the pull-up vale but a 0.1uF capacitor should provide a good power-up timing for GRST#.

Regards.

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XIO2001 Schematic Review