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82801AB Datasheet(PDF) 45 Page - Intel Corporation

Part # 82801AB
Description  82801AB (ICH0) I/O Controller Hub
PDF  414 Pages
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Manufacturer  INTEL [Intel Corporation]
Direct Link  http://www.intel.com
Logo INTEL - Intel Corporation

82801AB Datasheet(HTML) 45 Page - Intel Corporation

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82801AB and 82801AA Datasheet
3-3
Power Planes and Pin States
Note:
1. ICH sets these signals at reset for processor frequency strap.
Power Management
SLP_S3#
Resume
High
High
High
Low
Low
SLP_S5#
Resume
High
High
High
High
Low
SUS_STAT#
Resume
High
High
High
Low
Low
SUSCLK
(ICH only: 82801AA)
Resume
Running
Processor Interface
A20M#
Core
Note 1
High-Z
High-Z
Off
Off
IGNNE#
Core
Note 1
High-Z
High-Z
Off
Off
INIT#
Core
High-Z
High-Z
High-Z
Off
Off
INTR
Core
Note 1
Low
Low
Off
Off
NMI
Core
Note 1
Low
Low
Off
Off
SMI#
Core
High-Z
High-Z
High-Z
Off
Off
STPCLK#
Core
High-Z
High-Z
Low
Off
Off
SMBus Interface
SMBCLK, SMBDATA
Resume
High-Z
High-Z
High-Z
High-Z
High-Z
Miscellaneous Signals
SPKR
Core
Tri-stated
with
internal
pull-up
Low
Low
Off
Off
AC’97 Interface
AC_RST#
Resume
Low
Low
Cold
Reset Bit
(High)
Low
Low
AC_SDOUT
Core
Low
Running
Low
Low
Off
AC_SYNC
Core
Low
Running
Low
Off
Off
Unmuxed GPIO Signals
GPIO[21]
Core
High
High
Defined
Off
Off
GPIO[22]
Core
Low
Low
Defined
Off
Off
GPIO[23]
Core
Low
Low
Defined
Off
Off
GPIO[26]
(unmuxed in ICH0 only:
82801AB)
Resume
Low
Low
Defined
Defined
Defined
GPIO[27:28]
(unmuxed in ICH0 only:
82801AB)
Resume
Low
Low
Defined
Defined
Defined
Table 3-2. Power Plane and States for Output and I/O Signals (Sheet 2 of 2)
Signal Name
Power Plane
During
PCIRST#
Immediate
after
PCIRST#
S1
S3
S4/S5



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