82801DB Datasheet, PDF (38/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

Signal Description
Figure 2-1. Intel^® ICH4 Interface Signals Block Diagram
AD[31:0]
C/BE[3:0]#
DEVSEL#
FRAME#
IRDY#
TRDY#
STOP#
PAR
PERR#
REQ[4:0]#
REQ5# / REQB# / GPIO1
REQA# / GPIO0
GNT[4:0]#
GNT5# / GNTB# / GPIO17
GNTA# / GPIO[16]
PCICLK
PCIRST#
PLOCK#
SERR#
PME#
A20M#
CPUSLP#
FERR#
IGNNE#
INIT#
INTR
NMI
SMI#
STPCLK#
RCIN#
A20GATE
CPUPWRGD
SERIRQ
PIRQ[D:A]#
PIRQ[H:E] / GPIO[5:2]
IRQ[15:14]
APICCLK
APICD[1:0]
USBP0P–USB5P
USBP0N–USB5N
OC[5:0]#
USBRBIAS#
USBRBIAS
RTCX1
RTCX2
CLK14
CLK48
CLK66
SPKR
RTCRST#
TP[0]
GPIO[43:32, 28:27, 25:24]
GPIO[13:11, 8:0]
GPIO[23:16]
EE_SHCLK
EE_DIN
EE_DOUT
EE_CS
PCI
Interface
IDE
Interface
Processor
Interface
Power
Mgnt.
Interrupt
Interface
USB
RTC
Clocks
Misc.
Signals
General
Purpose
I/O
EEPROM
Interface
AC-
Link
Hub
Interface
Firmware
Hub
LPC
Interface
SMBus
Interface
System
Mgnt.
LAN
Link
PDCS1#
SDCS1#
PDCS3#
SDCS3#
PDA[2:0]
SDA[2:0]
PDD[15:0]
SDD[15:0]
PDDREQ
SDDREQ
PDDACK#
SDDACK#
PDIOR# (PDWSTB / PRDMARDY#)
SDIOR# (SDWSTB / SRDMARDY#)
PDIOW# (PDSTOP)
SDIOW# (SDSTOP)
PIORDY (PDRSTB / PWDMARDY#)
SIORDY (SDRSTB / SWDMARDY#)
THRM#
THRMTRIP#
SYS_RESET#
SLP_S3#
SLP_S4#
SLP_S5#
PWROK
PWRBTN#
RI#
RSMRST#
SUS_STAT# / LPCPD#
SUSCLK
LAN_RST#
VRMPWRGD
AC_RST#
AC_SYNC
AC_BIT_CLK
AC_SDOUT
AC_SDIN[2:0]
HI[11:0]
HI_STB / HI_STBS
HI_STB# / HI_STBF
HICOMP
HI_VSWING
FWH[3:0] / LAD[3:0]
FWH[4] / LFRAME#
LAD[3:0] / FWH[3:0]
LFRAME# / FWH[4]
LDRQ[1:0]#
SMBDATA
SMBCLK
SMBALERT# / GPIO[11]
INTRUDER#
SMLINK[1:0]
LAN_CLK
LAN_RXD[2:0]
LAN_TXD[2:0]
LAN_RSTSYNC
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Intel^® 82801DB ICH4 Datasheet