C4 exit timing, C-state popdown, C-state popup – ADLINK STC-15W04 User Manual
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BIOS
C4 Exit Timing
This option controls a programmable time for the CPU voltage
to stabilize when exiting from a C4 state. Set this value to
Default, Fast, Slow.
C-state Popdown
Disabling the option, prevents automatic return to a previous
C3 or C4 state. Set this value to Disabled, Enabled.
C-state Popup
When enabled, SB observes bus master request, will take sys-
tem from a C3/C4 state to a C2 state and auto enables bus
masters. Set this value to Disabled, Enabled.