Intel D425 AU80610006252AA Manuale Utente
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AU80610006252AA
Processor Configuration Registers
Datasheet
41
1.5.15
DEVEN - Device Enable
B/D/F/Type: 0/0/0/PCI
Address Offset:
54-57h
Default Value:
00000019h
Access:
RO; RW/L;
Size: 32
bits
Allows for enabling/disabling of PCI devices and functions that are within the CPU
Uncore. The table below the bit definitions describes the behavior of all combinations
of transactions to devices controlled by this register.
Uncore. The table below the bit definitions describes the behavior of all combinations
of transactions to devices controlled by this register.
Bit Access
Default
Value
RST/
PWR
Description
31:15 RO 00000h
Core
Reserved ():
14 RW/L 0b Core
Reserved ():
13:5 RO 000h Core
Reserved ():
4 RW/L 1b Core
Internal Graphics Engine Function 1
(D2F1EN):
0: Bus 0 Device 2 Function 1 is disabled and
hidden
1: Bus 0 Device 2 Function 1 is enabled and
visible
If Device 2 Function 0 is disabled and hidden,
then Device 2 Function 1 is also disabled and
hidden independent of the state of this bit.
If this component is not capable of Dual
Independent Display (CAPID0[40] = 1) then this
bit is hardwired to 0b to hide Device 2 Function
1.
(D2F1EN):
0: Bus 0 Device 2 Function 1 is disabled and
hidden
1: Bus 0 Device 2 Function 1 is enabled and
visible
If Device 2 Function 0 is disabled and hidden,
then Device 2 Function 1 is also disabled and
hidden independent of the state of this bit.
If this component is not capable of Dual
Independent Display (CAPID0[40] = 1) then this
bit is hardwired to 0b to hide Device 2 Function
1.
3 RW/L 1b Core
Internal Graphics Engine Function 0
(D2F0EN):
0: Bus 0 Device 2 Function 0 is disabled and
hidden
1: Bus 0 Device 2 Function 0 is enabled and
visible
If this CPU Uncore does not have internal
graphics capability (CAPID0[46] = 1) then Device
2 Function 0 is disabled and hidden independent
of the state of this bit.
(D2F0EN):
0: Bus 0 Device 2 Function 0 is disabled and
hidden
1: Bus 0 Device 2 Function 0 is enabled and
visible
If this CPU Uncore does not have internal
graphics capability (CAPID0[46] = 1) then Device
2 Function 0 is disabled and hidden independent
of the state of this bit.
2:1 RO 00b Core
Reserved ():
0 RO 1b Core
Host Bridge (D0EN):
Bus 0 Device 0 Function 0 may not be disabled
and is therefore hardwired to 1.
Bus 0 Device 0 Function 0 may not be disabled
and is therefore hardwired to 1.