DS80PCI800: Review schematic

Amira Roslan

Part Number: DS80PCI800

Tool/software:

Hi team,

Recently our production was facing issue with 1 of their hardware was unable to be detected in their product, and they discovered that the issue was due to timing issue on current CPU which is the BIOS boot up are faster than the Hardware. Hence, they have come out with 1 solution:

Solution: Rework at instrument level by adding a bridge from C112 to R45 for DS80PCI800SQE/NOPB at the re-driver board to allow 3.3V pump in RX detector to reduce the board reset time.

Is the following connection no problem? Will it be any issue if they do bridge from C112 to R45 on this DS80PCI800 part?

Thanks!

over 1 year ago

0 Nasser Mohammadi over 1 year ago

TI__Guru* 93670 points

Hi Amira,

I believe this should be ok. With this change, we are in manual rx detect and this causes a quicker indication of the presence of the receiver.

Regards, Nasser

0 Amira Roslan over 1 year ago in reply to Nasser Mohammadi

Prodigy 70 points

Hi Nasser,

Thanks for your input. For your opinion, is there any incoming risk that we should consider as we bridge the part?

+1 Nasser Mohammadi over 1 year ago in reply to Amira Roslan

TI__Guru* 93670 points

Hi Amira,

Typically we use a 1K-Ohm Resistor to pull up GPIOs. But i understand this is already in production. Maybe on next PCB layout you can consider pulling this pin up through a 1K-Ohm Resistor. This Resistor prevents any power supply spike that could get coupled into the part.

Regards, Nasser

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DS80PCI800: Review schematic