XIO2001: XIO2001

John Fioriglio

Part Number: XIO2001

What are possible faults I would see if the PCI LOCK pin on the XIO2001 is left floating instead of pulled high? Would cause the device on the PCI side of the bridge not to be recognized?

over 5 years ago

0 Davor Glisic over 5 years ago

TI__Expert 8165 points

Hello -

The XIO2001 LOCK pin requires a pull-up resistor per PCI spec. If left floating, it may be toggled due to system noise. If the LOCK pin is uncontrollably toggled, it may cause protocol errors and system failures.

Regards,

Davor

0 John Fioriglio over 5 years ago in reply to Davor Glisic

Prodigy 40 points

What would happen if the floating Lock pin is always perceived as a low?

0 Davor Glisic over 5 years ago in reply to John Fioriglio

TI__Expert 8165 points

Hello,

It may still cause protocol errors and system failures. An approved PCI bus pullup resistor to VCCP is required to keep the LOCK signal from floating, even if it is not connected to devices on the bus.

Regards,

Davor

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XIO2001: XIO2001