EP80579 Datasheet, PDF (1770/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
48.4.5.2 Miscellaneous Signals
Table 48-28. Miscellaneous Signals
Signal Name
PME#
IO Type
LVTTL,3.3V
Direction
Ball
Count
I/OD
1
External
Pull-Up/
Down
[Ohms]
BSC/
XOR
Signal Description Normal/Alternate Mode
BSC
PCI Power Management Event: Driven by PCI
peripherals to wake the system from low-power
states S3, S4 and S5. It can also cause an SCI
from the S0 state. Note that in some cases the
EP80579 may drive PME# active (low) due to an
internal wake event. It will not drive PME# high
(but it may be pulled up using the internal pull-
up resistor).
PME# is in the 3.3V VCCPSUS power plane and
has an internal pull-up resistor.
PCIRST#
LVTTL,3.3V O
1
SPKR
LVTTL,3.3V O
1
BSC
BSC
PCI Reset: This is the Secondary parallel PCI
Bus reset signal. It is a logical OR of the primary
interface PLTRST# signal and the state of the
Secondary Bus Reset bit.
Note: PCIRST# is in the 3.3V VCCPSUS well.
Speaker: The SPKR signal is the output of
counter 2 and is internally “ANDed” with Port
061h bit 1 to provide Speaker Data Enable. This
signal drives an external speaker driver device,
which in turn drives the system speaker. Upon
PLTRST#, its output state is 0.
This signal has a weak internal pull-down
resistor.
SPKR is sampled at platform reset as a
functional strap.
No Reboot Strap: This strap controls the re-boot
behavior of timeouts in the TCO timer.
The EP80579 interprets the strap as follows:
0 = Reboot on second timeout of TCO timer
(default).
1 = No re-boot on second timeout of TCO
timer.
TOTAL
3
48.4.5.3 Reserved
Table 48-29. Reserved Pin List (Sheet 1 of 2)
Signal Name
Reserved0
Reserved1
Reserved2
IO Type
Direction
Ball
Count
External
Pull-Up/
Down
[Ohms]
BSC/
XOR
Signal Description Normal/Alternate Mode
1
10K Down BSC
Reserved: This signal must be connected to VSS
via 10K-ohm pulldown.
1
10K Down BSC
Reserved: This signal must be connected to VSS
via 10K-ohm pulldown.
1
10K Down BSC
Reserved: This signal must be connected to VSS
via 10K-ohm pulldown.
Intel^® EP80579 Integrated Processor Product Line Datasheet
1770
August 2009
Order Number: 320066-003US