參數(shù)資料
型號(hào)： QT0081411TUE
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項(xiàng)-數(shù)據(jù)表參考
文件頁(yè)數(shù)： 42/62頁(yè)
文件大?。?/td> 268K
代理商： QT0081411TUE
82C814
Page 32
January 08, 1998
912-3000-047
Revision: 1.0
OPTi
Table 5-2
Specific Register Group - PCICFG 50h-5Fh
7
6
5
4
3
2
1
0
PCICFG 50h
PCI Host Feature Control Register
Default = 00h
Reserved
Primary INTA#-
INTD# Select
0 = No (pin 12
pulled down)
1 = Yes (pin 12
pulled up)
Vendor ID
feature
selected:
0 = No
1 = Yes
IRQLATCH
function
0 = Disable
(default)
1 = Enable
Docking detect
debounce:
0 = 1.0 sec
1 = 0.25 sec
CLKRUN# (on
host interface):
0 = Enabled
per PCI
1 = Disabled,
CLKRUN#
tristated
CRST# and
ENVCC5 Con-
trol
0 = Normal
1 = Force both
signals high,
ignore PCICFG
3Eh[6] and
MEMOFST
070h
MEMOFST 010
bits [2:0]
0 = Read/Write
1 = Read only
PCICFG 51h
Docking Feature Control Register 1
Default = 04h
Dock Interface clock divisor:
00 = 1 (Default)
01 = 2
10 = 3
11 = 4
Dock Interface-
clock source:
0 = PCICLK
1 = EXTCLK
Mode
select:
0 = Automatic
1 = Force async
CCLKRUN# on
dock interface
0 = Disabled
1 = Enabled
Dock Interface
threshold
voltage:
0 = 3.3V
1 = 5.0V
These bits retain their previously written value
regardless of dock attachment/removal.
Output Drive Select:
00 = Reserved
01 = Reserved
10 = 3.3V PCI dock
11 = 5.0V PCI dock
PCICFG 52h
Docking Feature Control Register 2
Default = 4Fh
Secondary PCICLK Skew:
This value selects the approximate delay, in nanoseconds, that the
internal secondary PCICLK must be skewed in order to compensate
for external buffer delays.
0000 = No delay
0001 = 1ns
.....
1101 = 13ns
1110 = 14ns
0010 = 2ns
1111 = 15ns
Block Prefetch
on Down-
stream Trans-
actions
0 = No
1 = Yes
(default)
Controls mem-
ory windows 0
& 1 only
Block Posted
Writes on
Downstream
Transactions
0 = No
1 = Yes
(default)
Controls mem-
ory windows 0
& 1 only
Enabled
delayed Trans-
actions
0 = Only when
window
selected as
ISA window
1 = On all win-
dows when-
ever retry
count exceeds
50% of retry
limit (PCICFG
5Eh[2:0]).
(default)
Type 1 to Type
0 conversion
blocked from
secondary to
primary:
0 = No
1 = Yes
(Default)
PCICFG 53h
Docking Feature Control Register 3
Default = 00h
Event signalled when PCICFG
3Eh[6] is changed
00 = None
01 = SMI#
10 = ACPI1 (DOCK#)
11 = ACPI2 (STSCHG#)
Note:
SMI# is available through IRQ Driveback or Serial IRQ; ACPI1 and ACPI2 are available only through IRQ Driveback
Event signalled when CD1-2#
change states
00 = None
01 = SMI#
10 = ACPI1 (DOCK#)
11 = ACPI2 (STSCHG#)
Event signalled on read of
MEMOFST 0-FFFh
00 = None
01 = SMI#
10 = ACPI1 (DOCK#)
11 = ACPI2 (STSCHG#)
Event signalled on write of
MEMOFST 0-FFFh
00 = None
01 = SMI#
10 = ACPI1 (DOCK#)
11 = ACPI2 (STSCHG#)
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