HPC3130A
PCI HOT PLUG CONTROLLER
SCPS055 – NOVEMBER 1999
disconnecting sequence (continued)
PCI_CLK
PWRON/OFF
PWRGOOD
SLOTRST
CLKON
REQ64ON
SLOTREQ64
BUS_CTL
IDLEREQ
IDLEGNT
FRAME
IRDY
BUSON
Figure 10. Automatic Disconnect Sequencing Mode
In manual disconnect mode, software has to perform each part of the disconnection sequence. Figure 11 is an
example of the manual disconnection sequence. There could be several other ways to implement this protocol.
During manual disconnection, the PCI bus may or may not idle; it will depend on the software implementation
of the system.
PCI_CLK
PWRON/OFF
PWRGOOD
SLOTRST
CLKON
REQ64ON
SLOTREQ64
BUS_CTL
BUSON
Figure 11. Manual Disconnect Sequencing Mode
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