82801BA Datasheet, PDF (56/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

Power Planes and Pin States
Table 3-4. Power Plane and States for Output and I/O Signals (Continued)
Signal Name
Power
Plane
Reset Signal
During Reset
Immediately
after Reset
C3
(ICH2-M)
S1
S3
PDA[2:0], SDA[2:0]
PDCS1#, PDCS3#
PDD[15:0], SDD[15:0]
PDDACK#, SDDACK#
PDIOR#, PDIOW#
SDCS1#, SDCS3#
SDIOR#, SDIOW#
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
Main I/O
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PIRQ[A:H]#
SERIRQ
APICD[1:0]
Main I/O
Main I/O
Main I/O
PCIRST#
PCIRST#
PCIRST#
USBP[3:0][P:N]
Resume I/O RSMRST#
CPUPERF# (ICH2-M)
C3_STAT# / GPIO[21]
(ICH2-M)
SSMUXSEL (ICH2-M)
SLP_S1# (ICH2-M)
SLP_S3#
SLP_S5#
STP_PCI# (ICH2-M)
STP_CPU# (ICH2-M)
SUS_STAT#
SUSCLK
Main I/O
Main I/O
Main I/O
Main I/O
Resume I/O
Resume I/O
Main I/O
Main I/O
Resume I/O
Resume I/O
PCIRST#
PCIRST#
PCIRST#
PCIRST#
RSMRST#
RSMRST#
PCIRST#
PCIRST#
RSMRST#
RSMRST#
A20M#
CPUPWRGD
CPUSLP#
IGNNE#
INIT#
INTR
NMI
SMI#
STPCLK#
CPU I/O
Main I/O
CPU I/O
CPU I/O
CPU I/O
CPU I/O
CPU I/O
CPU I/O
CPU I/O
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
PCIRST#
IDE Interface
Low
High
High-Z
High
High
High
High
Undefined
High
High-Z
High
High
High
High
Interrupts
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
USB Interface
High-Z
High-Z
Power Management
High-Z
High-Z
High
High
Low
High
High
High
High
High
High
Low
High
High
High
High
High
High
Processor Interface
See Note 1
See Note 3
High
High-Z
High
High
See Note 1
High
See Note 1
See Note 1
High
High
High
High
Low
Low
High
High
Undefined
Driven
Off
High
High
Off
Defined
High-Z
Off
High
Off
Off
High
Off
Off
High
Off
Off
High
Off
Off
Defined
High-Z
Off
Running
High-Z
Off
Running
High-Z
Off
High-Z
High-Z
High-Z
Defined
Defined
Low
Low
Defined
High
High
High
Defined
Low
Running
Defined
Low
High
High
Low
Low
Low
Off
Off
Off
Low
Low
High
Low
Low
Low
Defined
High
Off
High-Z
High-Z
Off
High
Defined
(ICH2)
Off
Low (ICH2-M)
High
High
Off
High
High
Off
Defined
Low
Off
Defined
Low
Off
Defined
High
Off
Low
Low
Off
S4/S5
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
High-Z
Off
Off
Off
Low
Low
Low
Low
Low
Low
Off
Off
Off
Off
Off
Off
Off
Off
Off
3-4
82801BA ICH2 and 82801BAM ICH2-M Datasheet