82801FB Datasheet, PDF (75/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

Signal Description
Table 2-22. Functional Strap Definitions (Sheet 2 of 2)
Signal
Usage
When Sampled
Comment
GNT[5]#/
GPO[17]
Boot BIOS
Destination
Selection
Rising Edge of
PWROK
Signal has a weak internal pull-up. Allows for select
memory ranges to be forwarded out the PCI Interface as
opposed to the Firmware Hub. When sampled high,
destination is LPC. Also controllable via Boot BIOS
Destination bit (Chipset Configuration Registers:Offset
3410h:bit 3).
EE_DOUT
Reserved
ACZ_SDOUT
XOR Chain
Entrance /
PCI Express*
Port Configu-
ration bit 1
ACZ_SYNC
PCI Express
Port Configu-
ration bit 0
TP[1]
(Desktop
Only) /
DPRSLPVR
(Mobile Only)
Reserved
SATALED#
Reserved
REQ[4:1]#
XOR Chain
Selection
TP[3]
XOR Chain
Entrance
Rising Edge of
PWROK
Rising Edge of
PWROK
Rising Edge of
PWROK
Rising Edge of
PWROK
NOTE: This functionality intended for debug/testing only.
This signal has a weak internal pull-up.
NOTE: This signal should not be pulled low.
Allows entrance to XOR Chain testing when TP[3] pulled
low at rising edge of PWROK. See Chapter 24 for XOR
Chain functionality information.
When TP[3] not pulled low at rising edge of PWROK, sets
bit 1 of RPC.PC (Chipset Configuration Registers:Offset
224h). See Section 7.1.30 for details.
This signal has a weak internal pull-down.
This signal has a weak internal pull-down.
Sets bit 0 of RPC.PC (Chipset Configuration
Registers:Offset 224h). See Section 7.1.30 for details.
This signal has a weak internal pull-down.
NOTE: This signal should not be pulled high.
This signal has a weak internal pull-up enabled only when
PLTRST# is asserted.
NOTE: This signal should not be pulled low.
See Chapter 24 for functionality information.
See Chapter 24 for functionality information. This signal
has a weak internal pull-up.
NOTE: This signal should not be pulled low unless using
XOR Chain testing.
NOTE: See Section 3.1for full details on pull-up/pull-down resistors.
Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet
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