CP6006-SA – User Guide, Rev. 0.5 Preliminary
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2.7.9.4.
Hot Swap Support
To ensure that a board may be removed and replaced in a working bus without disturbing the system, the following
additional features are required:
Power ramping
Precharge
Hot swap control and status register bits
Automatic interrupt generation whenever a board is about to be removed or replaced
A Hot Swap LED to indicate that the board may be safely removed
2.7.9.5.
Power Ramping
On the CP6006(X)-SA a special hot swap controller is used to ramp up the onboard supply voltage. This is done to
avoid transients on the +3.3V, +5V, +12V and -12V power supplies from the hot swap system. When the power supply
is stable, the hot swap controller generates an onboard reset to put the board into a definite state.
2.7.9.6.
Precharge
Precharge is provided on the CP6006(X)-SA by a resistor on each signal line (PCI bus) connected to a +1V reference
voltage.
2.7.9.7.
Handle Switch
A microswitch is situated in the extractor handle. The status of the handle is included in the onboard logic. The
microswitch is connected to the onboard connector J13.
2.7.9.8.
ENUM# Interrupt
If the board is operated in the system slot, the ENUM signal is an input.
2.7.9.9.
Hot Swap LED
The blue HS LED can be switched on or off by software. It may be used, for example, to indicate that the shutdown
process is finished and the board is ready for extraction.
