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Электронный компонент: INTEL450GX

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Intel 450KX/GX PCIset
The information in this document is subject to change.
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Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or
otherwise, to any intellectual property rights is granted by this document or by the sale of Intel products. Except as provided in
Intel's terms and Conditions of Sale for such products, Intel assumes no liability whatsoever, and Intel disclaims any express or
implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to fitness for a particular
purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not
intended for use in medical, life saving, or life sustaining applications.
Intel retains the right to make changes to specifications and product descriptions at any time, without notice.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.
Third party brands and names are the property of their respective owners.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be
obtained from:
Intel Corporation
P.O. Box 7641
Mt. Prospect, IL 60056-7641
or call 1-800-879-4683
COPYRIGHT INTEL CORPORATION 1996
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Contents
Chapter 1
Intel 450KX/GX PCIset Overview
1.0 Intel 450KX PCIset ....................................................................................................................................5
2.0 Intel 450GX PCIset ....................................................................................................................................6
3.0 Host Bus Efficiency ..................................................................................................................................6
4.0 System Memory Map ................................................................................................................................7
4.1 Compatibility Area ...............................................................................................................................8
4.2 Extended Memory (ISA) .....................................................................................................................9
4.3 Extended Memory (EISA) .................................................................................................................10
4.4 Extended Memory (above 4 Gbytes) ................................................................................................12
4.5 System Management Mode (SMM) ..................................................................................................12
5.0 I/O Space (PB Only) ................................................................................................................................12
6.0 Memory Mapped I/O ...............................................................................................................................13
Chapter 2
82454KX/GX PCI Bridge (PB)
1.0 PB Signal Descriptions ..........................................................................................................................19
1.1 PB Signals .......................................................................................................................................19
1.2 Signal State During Reset ................................................................................................................25
2.0 PB Register Description ........................................................................................................................26
2.1 Initialization and Configuration ..........................................................................................................26
2.2 I/O Space Registers ..........................................................................................................................27
2.2.1 CONFADD--Configuration Address Register ........................................................................28
2.2.2 TRC--Turbo and Reset ControL ............................................................................................29
2.2.3 CONFDATA--Configuration Data Register ............................................................................30
2.3 PCI Configuration Space ..................................................................................................................30
2.4 PB PCI Configuration Registers .......................................................................................................32
2.4.1 VID--Vendor Identification Register .......................................................................................34
2.4.2 DID--Device Identification Register .......................................................................................34
2.4.3 PCICMD--PCI Command Register .......................................................................................34
2.4.4 PCISTS--PCI Status Register ...............................................................................................35
2.4.5 RID--Revision Identification Register ....................................................................................36
2.4.6 CLASSC--Class Code Register ............................................................................................36
2.4.7 CLSIZE--Cache Line Size Register ......................................................................................36
2.4.8 PLTMR--PCI Latency Timer ..................................................................................................37
2.4.9 HEADT--Header Type Register .............................................................................................37
2.4.10 BIST--Bist register ..............................................................................................................37
2.4.11 TSM--Top of System Memory Register ...............................................................................38
2.4.12 PDM--PCI Decode Mode ....................................................................................................38
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2.4.13 BDNUM--Bridge Device Number Register ..........................................................................39
2.4.14 PBNUM--PCI Bus Number Register ...................................................................................39
2.4.15 PSBNUM--Subordinate Bus Number Register ...................................................................40
2.4.16 PBC--PB Configuration Register .........................................................................................40
2.4.17 DCC--Deturbo Counter Register .........................................................................................41
2.4.18 CRWC--CPU Read/Write Control Register .........................................................................41
2.4.19 PRWC--PCI Read/Write Control .........................................................................................42
2.4.20 SMME--SMRAM Enable Register .......................................................................................43
2.4.21 VBAE--Video Buffer Area Enable Register .........................................................................43
2.4.22 PAM[0:6]--Programmable Attribute MAp Register ...............................................................44
2.4.23 ERRCMD--Error Reporting Command Register .................................................................45
2.4.24 ERRSTS--Error Reporting Status Register .........................................................................45
2.4.25 MGR--Memory Gap Range Register ..................................................................................46
2.4.26 MGUA--Memory Gap Upper Address Register ...................................................................46
2.4.27 PFB--PCI Frame Buffer Register .........................................................................................47
2.4.28 HMGSA--High Memory Gap Range Start Address Register ..............................................48
2.4.29 HMGEA--High Memory Gap End Address Register ...........................................................48
2.4.30 IOSR1--I/O Space Range 1 Register (82454GX Only) .......................................................49
2.4.31 PCIRSR--PCI Reset Register .............................................................................................49
2.4.32 IOSR2--I/O Space Range 2 Register (82454GX Only) .......................................................50
2.4.33 APICR--I/O APIC Range Register ......................................................................................50
2.4.34 CONFVR--Configuration Values Driven on Reset Register ................................................51
2.4.35 CSCONFV--Captured System Configuration Values Register ............................................52
2.4.36 SMMR--SMRAM Range Register .......................................................................................53
2.4.37 HBIOSR--High BIOS Range Register .................................................................................53
2.4.38 EXERRCMD--PB Extended Error Reporting Command Register ......................................53
2.4.39 EXERRSTS--PB Extended Error Reporting Status ............................................................55
2.4.40 PBRTMR--PB Retry Timers ................................................................................................56
3.0 PB Functional Description ....................................................................................................................57
3.1 Memory and I/O Map ........................................................................................................................57
3.1.1 Memory Address Map ............................................................................................................57
3.1.2 I/O Address Map ....................................................................................................................59
3.2 Host Bus Interface ............................................................................................................................60
3.3 PCI Bus Interface ..............................................................................................................................61
3.4 Data Integrity and Error Handling .....................................................................................................62
3.4.1 Host Bus Errors ......................................................................................................................62
3.4.2 PCI Bus Errors .......................................................................................................................62
3.4.2.1 PB Master Operation on PCI ....................................................................................63
3.4.2.2 PB Target Operation on PCI .....................................................................................63
3.5 Dual PB Architectures (82454GX Only) ............................................................................................65
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3.6 Peripheral Operation and Performance ............................................................................................68
3.6.1 Matching Peripherals to the 450KX/GX .................................................................................68
3.6.2 Distributing Peripherals Within the I/O Subsystem .................................................................69
3.6.3 PCI-to-PCI Bridges ................................................................................................................69
3.6.4 BIOS Performance Tuning ......................................................................................................69
3.7 Clock, Reset, and Configuration .......................................................................................................70
3.7.1 System clocking .....................................................................................................................70
3.7.1.1 Host Bus Clock .........................................................................................................70
3.7.1.2 PCI Clock ..................................................................................................................71
3.7.2 System Reset .........................................................................................................................71
3.7.3 System Initialization ...............................................................................................................72
3.7.4 Dual PB Configuration (82454GX only) .................................................................................72
3.7.5 Using the 82379AB SIO.A PCI-to-ISA Bridge with the 450KX/GX .........................................73
3.8 Host to PCI Bus Command Translation ............................................................................................76
3.9 PCI to Host Bus Command Translation ............................................................................................77
4.0 PB Pinout and Package Information .....................................................................................................79
4.1 Pin Assignment .................................................................................................................................79
4.2 Package Information .........................................................................................................................87
Chapter 3
Memory Controller (MC)
1.0 MC Signal Description ...........................................................................................................................93
1.1 DC Signals ........................................................................................................................................93
1.2 DP Signals ........................................................................................................................................96
1.3 MIC Signals ......................................................................................................................................98
1.4 Signal State During Reset ..............................................................................................................100
2.0 MC Register Description ......................................................................................................................101
2.1 Initialization and Configuration ........................................................................................................101
2.2 I/O Space Registers ........................................................................................................................102
2.2.1 CONFADD--Configuration Address Register ......................................................................103
2.2.2 CONFDATA--Configuration Data Register ..........................................................................103
2.3 MC Configuration Registers ............................................................................................................104
2.3.1 VID--Vendor Identification Register .....................................................................................105
2.3.2 DID--Device Identification Register .....................................................................................105
2.3.3 PCICMD--PCI Command Register .....................................................................................106
2.3.4 PCISTS--PCI Status Register .............................................................................................106
2.3.5 RID--Revision Identification Register ..................................................................................106
2.3.6 CLASSC--Class Code Register ..........................................................................................107
2.3.7 BASEADD--MC Base Address Register (450GX only) .......................................................107
2.3.8 CDNUM--Controller Device Number Register ....................................................................108
2.3.9 CMD--Command Register ..................................................................................................108