NH82801GHM S L8YR Intel, NH82801GHM S L8YR Datasheet - Page 67
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NH82801GHM S L8YR
Manufacturer Part Number
NH82801GHM S L8YR
Description
Manufacturer
Intel
Datasheet
1.NH82801GHM_S_L8YR.pdf
(848 pages)
Specifications of NH82801GHM S L8YR
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Signal Description
Table 2-13. Processor Interface Signals (Sheet 2 of 3)
Intel
®
ICH7 Family Datasheet
INIT3_3V#
and Mobile
STPCLK#
(Desktop
IGNNE#
RCIN#
Name
INIT#
Only)
SMI#
INTR
NMI
Type
O
O
O
O
O
O
O
I
Ignore Numeric Error: This signal is connected to the ignore error pin
on the processor. IGNNE# is only used if the ICH7 coprocessor error
reporting function is enabled in the OIC.CEN register (Chipset Config
Registers:Offset 31FFh: bit 1). If FERR# is active, indicating a coprocessor
error, a write to the Coprocessor Error register (I/O register F0h) causes
the IGNNE# to be asserted. IGNNE# remains asserted until FERR# is
negated. If FERR# is not asserted when the Coprocessor Error register is
written, the IGNNE# signal is not asserted.
Initialization: INIT# is asserted by the ICH7 for 16 PCI clocks to reset
the processor. ICH7 can be configured to support processor Built In Self
Test (BIST).
Initialization 3.3 V: This is the identical 3.3 V copy of INIT# intended
for Firmware Hub.
CPU Interrupt: INTR is asserted by the ICH7 to signal the processor that
an interrupt request is pending and needs to be serviced. It is an
asynchronous output and normally driven low.
Non-Maskable Interrupt: NMI is used to force a non-Maskable interrupt
to the processor. The ICH7 can generate an NMI when either SERR# is
asserted or IOCHK# goes active via the SERIRQ# stream. The processor
detects an NMI when it detects a rising edge on NMI. NMI is reset by
setting the corresponding NMI source enable/disable bit in the NMI Status
and Control register (I/O Register 61h).
System Management Interrupt: SMI# is an active low output
synchronous to PCICLK. It is asserted by the ICH7 in response to one of
many enabled hardware or software events.
Stop Clock Request: STPCLK# is an active low output synchronous to
PCICLK. It is asserted by the ICH7 in response to one of many hardware
or software events. When the processor samples STPCLK# asserted, it
responds by stopping its internal clock.
Keyboard Controller Reset CPU: The keyboard controller can generate
INIT# to the processor. This saves the external OR gate with the ICH7’s
other sources of INIT#. When the ICH7 detects the assertion of this
signal, INIT# is generated for 16 PCI clocks.
NOTE: The ICH7 will ignore RCIN# assertion during transitions to the S1,
S3, S4, and S5 states.
Description
67
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