
Chapter 4
Registers
215
24674
Rev. 3.00
April 2003
AMD-8111 HyperTransport I/O Hub Data Sheet
AMD Preliminary Information
VID/FID LDTSTOP_L Time Register
DevB:3x74
Default:
00h.
Attribute:
Read-write.
19
POSLS. Power on suspend LDTSTOP_L assertion.
This applies to the Stop Grant cycle
associated with POS after PM04[SLP_TYP] is written with the POS value.
18:16
POSSMAF. Power on suspend system management action
fi
eld.
This applies to the STPCLK
cycle associated with POS after PM04[SLP_TYP] is written with the POS value.
15
Reserved.
14:12
VFSMAF. VID/FID system management action
fi
eld.
This applies to the STPCLK cycle associated
with the HyperTransport
technology system management VID/FID change request message.
11
C3LS. C3 LDTSTOP_L assertion.
This applies to the Stop Grant cycle associated with C3 after
PM15 is accessed.
10:8
C3SMAF. C3 system management action
fi
eld.
This applies to the STPCLK cycle associated with
C3 after PM15 is accessed.
7
Reserved.
6:4
C2SMAF. C2 system management action
fi
eld.
This applies to the STPCLK cycle associated with
C2 after PM14 is accessed.
3
Reserved.
2:0
S45SMAF. S4/S5 system management action
fi
eld.
This applies to the STPCLK cycle associated
with S4 and S5 after PM04[SLP_TYP] is written with the either of these value.
Bits
7:5
4:3
Description
Reserved.
C3S1LST. C3, S1 LDTSTOP_L assertion delay timer.
See Section 3.7.1.6 on page 57 for functional
description of FON to C3 and FON to POS. (The times listed below are minimums, values up to 10%
longer are within spec)
C3S1LST
Time
C3S1LST
00b
1 microsecond
10b
01b
32 microseconds
11b
FVLST. Frequency ID/Voltage ID LDTSTOP_L timer.
This
fi
eld speci
fi
es the minimum duration of
LDTSTOP_L assertion when any of the following occur:
a) ACPI State transition for which LDTSTOP_L assertion is enabled,
b) HyperTransport
technology system management VID/FID change request,
c) LDTSTOP command through DevB:3x78.
The times shown below except FVLST=000b have a tolerance of +/
–
10%.
FVLST
Time
FVLST
000b
1 microseconds (min, +10%)
100b
001b
2 microseconds
101b
010b
4 microseconds
110b
011b
8 microseconds
111b
Time
64 microseconds
128 microseconds
2:0
Time
16 microseconds
32 microseconds
64 microseconds
128 microseconds