NHE6300ESB S L7XJ Intel, NHE6300ESB S L7XJ Datasheet - Page 141
NHE6300ESB S L7XJ
Manufacturer Part Number
NHE6300ESB S L7XJ
Description
Manufacturer
Intel
Datasheet
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Specifications of NHE6300ESB S L7XJ
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5—Intel
5.10
5.10.1
5.10.1.1 A20M#
5.10.1.2 INIT#
Table 59.
November 2007
Order Number: 300641-004US
®
6300ESB ICH
Processor Interface (D31:F0)
The Intel
Most Intel
6300ESB ICH has a separate V
processor voltage, and thus determines V
this is different than previous generations of chips, that have used open-drain outputs.
This new method saves up to 12 external pull-up resistors.
The Intel
Processor Interface Signals
This section describes each of the signals that interface between the Intel
ICH and the processor(s).
The A20M# signal will be active (low) when both of the following conditions are true:
The A20GATE input signal is expected to be generated by the external microcontroller
(KBC).
The INIT# signal will be active (low) based on any one of several events described in
Table
then driven high.
The 16-clock counter for INIT# assertion will halt while STPCLK# is active. INIT# will
not go active until after STPCLK# goes inactive.
INIT# Going Active (Sheet 1 of 2)
Shutdown special cycle from processor.
PORT92 write, where INIT_NOW (bit 0) transitions
from a 0 to a 1.
•
•
•
•
Standard Outputs to the processor: A20M#, SMI#, NMI, INIT#, INTR, STPCLK#,
IGNNE#, CPUSLP#
The FERR# input to the Intel
Vil threshold is compatible with processors that drive FERR# no higher than 1.3V
+/- 5%.
The ALT_A20_GATE bit (Bit 1 of PORT92 register) is a ‘0’
The A20GATE input signal is a ‘0’
59. When any of these events occur, INIT# will be driven low for 16 PCI clocks,
®
®
Cause of INIT# Going Active
®
6300ESB ICH interfaces to the processor with a variety of signals
6300ESB ICH does not support the processor’s FRC mode.
6300ESB ICH outputs to the processor use standard buffers. The Intel
CC
®
signal which is pulled up at the system level to the
6300ESB ICH has special buffer requirements. The
OH
for the outputs to the processor. Note that
Intel
Comment
®
6300ESB I/O Controller Hub
®
6300ESB
®
141
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