Usb Legacy Keyboard Flow Diagram - Intel 6300ESB Datasheet

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5—Intel 6300ESB ICH
Figure 21. USB Legacy Keyboard Flow Diagram
KBC Accesses
PCI Config
Read, W rite
North PCI cycle
November 2007
Order Number: 300641-004US
60 READ
Clear SMI_60_R
.
Comb
Decoder
EN_PIRQD#
USB_IRQ
S
D
Clear USB_IRQ
R
EN_SMI_ON_IRQ
S
D
AND
R
EN_SMI_ON_60R
NOT (North PCI gnt)
Same for 60W , 64R, 64W
AND
AND
To Individual
"Caused By"
"Bits"
SMI
OR
To PIRQD#
To "Caused By" Bit
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Intel 6300ESB I/O Controller Hub
DS
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