82801BA データシートの表示（PDF） - Intel

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82801BA

Intel® 82801BA I/O Controller Hub 2 (ICH2) and Intel® 82801BAM I/O Controller Hub 2 Mobile (ICH2-M)

Intel 

Contents

1

Introduction ................................................................................................................1-1

1.1 About this Document ....................................................................................1-1

1.2 Overview.......................................................................................................1-3

2

Signal Description......................................................................................................2-1

2.1 Hub Interface to Host Controller ...................................................................2-1

2.2 Link to LAN Connect.....................................................................................2-1

2.3 EEPROM Interface .......................................................................................2-2

2.4 Firmware Hub Interface ................................................................................2-2

2.5 PCI Interface.................................................................................................2-2

2.6 IDE Interface.................................................................................................2-5

2.7 LPC Interface................................................................................................2-6

2.8 Interrupt Interface .........................................................................................2-6

2.9 USB Interface ...............................................................................................2-7

2.10 Power Management Interface.......................................................................2-7

2.11 Processor Interface.......................................................................................2-9

2.12 SMBus Interface .........................................................................................2-10

2.13 System Management Interface...................................................................2-10

2.14 Real Time Clock Interface ..........................................................................2-11

2.15 Other Clocks ...............................................................................................2-11

2.16 Miscellaneous Signals ................................................................................2-11

2.17 AC’97 Link ..................................................................................................2-12

2.18 General Purpose I/O...................................................................................2-12

2.19 Power and Ground......................................................................................2-13

2.20 Pin Straps ...................................................................................................2-14

2.20.1 Functional Straps ...........................................................................2-14

2.20.2 Test Signals ...................................................................................2-15

2.20.2.1 Test Mode Selection.......................................................2-15

2.20.2.2 Test Straps (82801BA ICH2 only) ..................................2-15

2.20.3 External RTC Circuitry ...................................................................2-16

2.20.4 V5REF / Vcc3_3 Sequencing Requirements .................................2-16

3

Power Planes and Pin States ....................................................................................3-1

3.1 Power Planes................................................................................................3-1

3.2 Integrated Pull-Ups and Pull-Downs.............................................................3-1

3.3 IDE Integrated Series Termination Resistors ...............................................3-2

3.4 Output and I/O Signals Planes and States ...................................................3-2

3.5 Power Planes for Input Signals.....................................................................3-6

4

System Clock Domains..............................................................................................4-1

vi

82801BA ICH2 and 82801BAM ICH2-M Datasheet

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