NH82801DBSL8DE 869490 Intel, NH82801DBSL8DE 869490 Datasheet - Page 351
NH82801DBSL8DE 869490
Manufacturer Part Number
NH82801DBSL8DE 869490
Description
Manufacturer
Intel
Datasheet
1.NH82801DBSL8DE_869490.pdf
(587 pages)
Specifications of NH82801DBSL8DE 869490
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9.8.1.7
9.8.1.8
Intel
®
82801DB ICH4 Datasheet
MON[n]_TRP_RNG—I/O Monitor [4:7] Trap Range Register for
Devices 4
Offset Address:
Default Value:
Lockable:
Power Well:
These registers set the ranges that Device Monitors 4–7 should trap. Offset 4Ch corresponds to
Monitor 4. Offset C6h corresponds to Monitor 5, etc.
If the trap is enabled in the MON_SMI register and the address is in the trap range (and passes the
mask set in the MON_TRP_MSK register) the ICH4 will generate an SMI#. This SMI# occurs if
the address is positively decoded by another device on PCI or by the ICH4 (because it would be
forwarded to LPC or some other ICH4 internal registers). The trap ranges should not point to
registers in the ICH4’s internal IDE, USB, AC ’97 or LAN I/O space. If the cycle is to be claimed
by the ICH4 and targets one of the permitted ICH4 internal registers (interrupt controller, RTC,
etc.), the cycle will complete to the intended target and an SMI# will be generated (this is the same
functionality as the ICH component). If the cycle is to be claimed by the ICH4 and the intended
target is on LPC, an SMI# will be generated but the cycle will only be forwarded to the intended
target if forwarding to LPC is enabled via the TRP_FWD_EN register settings.
MON_TRP_MSK—I/O Monitor Trap Range Mask Register for Devices
4–7 (PM—D31:F0)
Offset Address:
Default Value:
Lockable:
Power Well:
15:12
15:0
11:8
Bit
Bit
7:4
3:0
MON[n]_TRAP_BASE — R/W. Base I/O locations that MON[ n ] traps (where n = 4, 5, 6 or 7). The
range can be mapped anywhere in the processor I/O space (0
Any access to the range will generate an SMI# if enabled by the associated DEV[ n ]_TRAP_EN bit in
the MON_SMI register (PMBASE +40h).
MON7_MASK — R/W. Selects low 4-bit mask for the I/O locations that MON7 will trap. Similar to
MON4_MASK.
MON6_MASK — R/W. Selects low 4-bit mask for the I/O locations that MON6 will trap. Similar to
MON4_MASK.
MON5_MASK — R/W. Selects low 4-bit mask for the I/O locations that MON5 will trap. Similar to
MON4_MASK.
MON4_MASK — R/W. Selects low 4-bit mask for the I/O locations that MON7 will trap. When a
mask bit is set to a 1, the corresponding bit in the base I/O selection will not be decoded.
For example, if MON4_TRAP_BASE = 1230h, and MON4_MSK = 0011b, the Intel
decode 1230h, 1231h, 1232h, and 1233h for Monitor 4.
–
7 (PM—D31:F0)
C4h, C6h, C8h, CAh
00h
No
Core
CCh
00h
No
Core
Description
Description
Attribute:
Size:
Usage:
Attribute:
Size:
Usage:
LPC Interface Bridge Registers (D31:F0)
–
64 KB).
R/W
16 bits
Legacy Only
R/W
16 bits
Legacy Only
®
ICH4 will
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