FW82801E Intel, FW82801E Datasheet - Page 53

• Manufacturer Part Number: FW82801E
• Description: Communications I/O Controller Hub
• Manufacturer: Intel

3.4.4
Advance Information Datasheet
Table 32. Power Plane and States for Output and I/O Signals (Sheet 1 of 3)
Output and I/O Signals Planes and States
Table 32 shows the power plane associated with the output and I/O signals, as well as the state at
various times. Within the table, the following terms are used:
“High-Z”
“High”
“Low”
“Defined”
“Undefined”
“Running”
“Off”
NOTES:
1. The 82801E C-ICH sets these signals at reset for processor frequency strap.
2. I GPIO[18] will toggle at a frequency of approximately 1 Hz when the 82801E C-ICH comes out of reset
3. CPUPWRGD is an open-drain output that represents a logical AND of the VRMPWRGD and PWROK
4. GPIO[24:25, 27:28]: These signals remain tri-stated for up to 110 ms after RSMRST# deassertion. At this
signals and, thus, are driven low by 82801E C-ICH when either VRMPWRGD or PWROK are inactive.
During boot, or during a hard reset with power cycling, CPUPWRGD will be expected to transition from low
to High-Z.
point, they will be driven to their default (High) state.
GNT[3:0]#, GNT[5]#
EE0_CS, EE1_CS
IRDY#, TRDY#
Signal Name
C/BE#[3:0]
GNT[A:B]#
LFRAME#
DEVSEL#
PCIRST#
FRAME#
PLOCK#
AD[31:0]
LAD[3:0]
PERR#
STOP#
PAR
Tri-state. 82801E C-ICH not driving the signal high or low.
The 82801E C-ICH is driving the signal to a logic ‘1’.
The 82801E C-ICH is driving the signal to a logic ‘0’.
The signal is driven to a level that is defined by the function (will be high or low).
The 82801E C-ICH is driving the signal, but the value is indeterminate.
The clock is toggling or signal is transitioning because function not stopping.
The power plane is off; the 82801E C-ICH is not driving.
Power Plane
LAN Connect and EEPROM Interface
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
LAN I/O
LPC Interface
PCI Bus
RSM_PWROK
Reset Signal
RSMRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
During Reset
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High
High
High
Low
Low
Intel
®
82801E C-ICH
Immediately
after Reset
Undefined
Undefined
Undefined
Running
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High
High
High
High
High
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