845GL datasheet(7/193 Pages) INTEL

7 / 193 page

Intel® 82845G/82845GL/82845GV GMCH

Datasheet

System Address ................................................................................................139

5.1

System Memory Address Ranges ...............................................................139

5.1.1

Compatibility Area...........................................................................141

5.1.2

Extended Memory Area ..................................................................143

5.1.2.1

15 MB–16 MB Window ....................................................143

5.1.2.2

Pre-Allocated Memory .....................................................143

5.1.3

AGP Memory Address Ranges.......................................................146

Electrical Characteristics ..............................................................................147

6.1

Absolute Maximum Ratings .........................................................................147

6.2

Thermal Characteristics ...............................................................................147

6.3

Power Characteristics ..................................................................................148

6.4

Signal Groups ..............................................................................................148

6.5

DC Parameters ............................................................................................150

6.6

DAC Characteristics.....................................................................................153

6.6.1

DAC DC Characteristics .................................................................153

6.6.2

DAC Reference and Output Specifications.....................................154

6.6.3

DAC AC Characteristics..................................................................154

Ballout and Package Information...............................................................155

7.1

Intel® 82845G GMCH Ballout ......................................................................155

7.2

Package Information ....................................................................................170

Testability.............................................................................................................173

8.1

XOR Test Mode Initialization .......................................................................173

8.2

XOR Chain Definition...................................................................................173

8.3

XOR Chains Excluded Pins .........................................................................180

9Intel® 82845GL/82845GV GMCH .................................................................181

9.1

Processor System Bus (PSB) Frequency ....................................................181

9.2

No AGP Interface.........................................................................................182

9.3

Intel® 82845G and Intel® 82845GL/82845GV Signal Differences ...............182

9.3.1

Functional Straps (82845GL only) ..................................................182

9.4

Intel® 82845G and Intel® 82845GL/82845GV Register Differences............183

9.4.1

DRAM Controller/Host-Hub Interface Device Registers (Device 0) 183

9.4.1.1

Device 0 Registers Not in 82845GL/82845GV ................183

9.4.1.2

Device 0 Register Bit Differences....................................184

9.4.2

Host-to-AGP Bridge Registers (Device 1).......................................186

9.5

Synchronous Display Differences ................................................................186

9.6

Intel® 82845GL\82845GV GMCH Ballout ....................................................186

845GL 数据表(PDF) 7 Page - Intel Corporation

845GL 数据表(HTML) 7 Page - Intel Corporation

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