How to design for hot-swapping

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andy1

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What needed to ensure hot-swapping for a embbeded micro-controller board to be plugged into a PCI slot?

There are PCI target interface IC that supports hot-swapping but how would you handel power supply to the board and to the CPU that also on the board?

What do you need to do?
 

Hi
Hot swapping requires you to ensure correct "powering up" your card.
For example: if only 3.3v supply is in used: connect a P-channel fet - Source to the 3.3v pin, resistor between S and G, and connect the G to the GND. the circuit will be powered by the D of the fet.
What have you got? - if the 3.3v is connected without the GND - FET will not open - card will not get VCC without GND... You can extrapolate for extra connection and powering sequence.

Also smart to note: hot swapping many time ends with misconnections (user insert part of the card with miss-alignment) and result with power pins connected to the wrong inputs - diode are used for protection at the appropriate places.

Shutter_man
 

I found this on the web from Maxim :

**broken link removed**

They have quite a few IC for this type of thing.
 

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