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82801DB Datasheet, PDF (20/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)
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Industry Specifications................................................................................... 27
PCI Devices and Functions ........................................................................... 30
Hub Interface Signals .................................................................................... 39
LAN Connect Interface Signals...................................................................... 39
EEPROM Interface Signals ........................................................................... 40
Firmware Hub Interface Signals .................................................................... 40
PCI Interface Signals ..................................................................................... 40
IDE Interface Signals ..................................................................................... 43
LPC Interface Signals .................................................................................... 44
Interrupt Signals............................................................................................. 44
USB Interface Signals.................................................................................... 45
Power Management Interface Signals........................................................... 46
Processor Interface Signals........................................................................... 47
SM Bus Interface Signals .............................................................................. 48
System Management Interface Signals ......................................................... 48
Real Time Clock Interface ............................................................................. 49
Other Clocks .................................................................................................. 49
Miscellaneous Signals ................................................................................... 49
AC-Link Signals ............................................................................................. 50
General Purpose I/O Signals ......................................................................... 51
Power and Ground Signals............................................................................ 52
Functional Strap Definitions........................................................................... 53
Test Mode Selection ...................................................................................... 55
Intel® ICH4 System Power Planes................................................................. 57
Integrated Pull-Up and Pull-Down Resistors ................................................. 58
IDE Series Termination Resistors.................................................................. 58
Power Plane and States for Output and I/O Signal ....................................... 59
Power Plane for Input Signals ....................................................................... 63
Intel® ICH4 and System Clock Domains........................................................ 65
Type 0 Configuration Cycle Device Number Translation............................... 71
LPC Cycle Types Supported ......................................................................... 87
Start Field Bit Definitions ............................................................................... 87
Cycle Type Bit Definitions.............................................................................. 88
Transfer Size Bit Definition ............................................................................ 88
SYNC Bit Definition........................................................................................ 88
Intel® ICH4 Response to Sync Failures......................................................... 89
DMA Transfer Size ........................................................................................ 94
Address Shifting in 16-bit I/O DMA Transfers................................................ 94
DMA Cycle vs. I/O Address ........................................................................... 98
PCI Data Bus vs. DMA I/O Port Size ............................................................. 98
DMA I/O Cycle Width vs. BE[3:0]# ................................................................ 98
Counter Operating Modes ........................................................................... 104
Interrupt Controller Core Connections ......................................................... 106
Interrupt Status Registers ............................................................................ 107
Content of Interrupt Vector Byte .................................................................. 107
APIC Interrupt Mapping ............................................................................... 113
Arbitration Cycles......................................................................................... 115
APIC Message Formats............................................................................... 115
EOI Message ............................................................................................... 116
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Intel® 82801DB ICH4 Datasheet