E
T
T
INTEL 440LX AGPSET: 82443LX PCI
A.G.P. CONTROLLER (PAC)
T
Accelerated Graphics Port (A.G.P.)
Interface
A.G.P. Specification Compliant
A.G.P. 66/133 MHz 3.3V Devices
Supported
Synchronous Coupling to the Host
Bus Frequency
PCI Bus Interface
PCI Revision 2.1 Interface
Compliant
Greater Than 100-MBps Data
Streaming for PCI-to-DRAM
Accesses
Integrated Arbiter With Multi-
Transaction PCI Arbitration
Acceleration Hooks
Five PCI Bus Masters are Supported
in Addition to the Host and PCI-to-
ISA I/O Bridge
Delayed Transaction Support
PCI Parity Checking and Generation
Support
Data Buffering For Increased
Performance
Extensive CPU-to-DRAM, PCI-to-
DRAM, and A.G.P.-to-DRAM Write
Data Buffering
CPU-to-A.G.P., PCI-to-A.G.P., and
A.G.P.-to-PCI Data Buffering
Write Combining Support for
CPU-to-PCI Burst Writes
Supports Concurrent Host, PCI, and
A.G.P. Transactions to Main
Memory
System Management Mode (SMM)
Compliant
492 Pin BGA Package
Supports the Pentium
®
II
Processor at
a Bus Frequency of 66 MHz
Supports 32-Bit Addressing
Optimized In-Order and Request
Queue
Full Symmetric Multi-Processor
(SMP) Protocol for Up to Two
Processors
Dynamic Deferred Transaction
Support
GTL+ Compliant Host Bus
Supports WC Cycles
Integrated DRAM Controller
EDO (Extended Data Out), and
Synchronous DRAM Support
Supports a Maximum Memory Size
of 512 MB With SDRAM, or 1 GB
With EDO
64/72-bit Path to Memory
Configurable DRAM Interface
Support for Auto Detection of
Memory Type: (DIMM Serial
Presence Detect)
8 RAS Lines Available
Support for 4-, 16- and 64-Mbit
DRAM devices
Support for Symmetrical and
Asymmetrical DRAM Addressing
Configurable Support for ECC/EC
ECC With Single Bit Error
Correction and Multiple Bit Error
Detection
Read-Around-Write Support for
Host and PCI DRAM Read Accesses
Supports 3.3V DRAMs
T
T
T
T
The 82443LX (PAC) is the first generation of desktop AGPset designed for the Pentium
®
II
processor. The
82443LX PCI A.G.P. Controller (PAC) integrates a Host-to-PCI bridge, optimized DRAM controller and data
path, and an Accelerated Graphics Port (A.G.P.) interface. A.G.P. is a high performance, component level
interconnect, targeted at 3D graphics applications and based on a set of performance enhancements to PCI.
The I/O subsystem portion of the PAC platform is based on the PIIX4, a highly integrated version of the
Intel’s PCI-to-ISA bridge family. PAC is developed as the ultimate Pentium
II
processor platform and is
targeted for emerging 3D graphics and multimedia applications. The 440LX AGPset may contain design
defects or errors known as errata which may cause the product to deviate from published specifications.
Current characterized errata are available on request.
January 1998
Order Number: 290564-002
1/29/98 1:26 PM 440LX_20.DOC
INTEL CONFIDENTIAL
(until publication date)
INTEL 82443LX (PAC)
E
Host
Interface
PCI Bus
Interface
(PCI #0)
AD[31:0]
C/BE[3:0]#
FRAME#
TRDY#
IRDY#
DEVSEL#
PAR
PERR#
SERR#
PLOCK#
STOP#
PHLD#
PHLDA#
WSC#
REQ[4:0]#
GNT[4:0]#
GAD[31:0]
GC/BE[3:0]#
GFRAME#
GIRDY#
GTRDY#
GSTOP#
GDEVSEL#
GPERR#
GSERR#
GREQ#
GGNT#
GPAR
PIPE#
SBA[7:0]
RBF#
STOP#
ST[2:0]
ADSTB_A
ADSTB_B
SBSTB
A[31:3]#
ADS#
DPRI#
DNR#
CPURST#
DBSY#
DEFER#
HD[63:0]#
HIT#
HITM#
HLOCK#
HREQ[4:0]#
HTRDY#
INIT#
RS[2:0]#
RCSA[5:0]#
RCSA[7:6]#/MAB[3:2]
RCSB[7:0]#/MAB[13:6]
CDQA[7:0]#
CDQB1#
CDQB5#
SRAS[2:0]#
SRAS3#/MAB5
SCAS[2:0]#
SCAS3#/MAB4
MAA[13:0]
MAB[1:0]
WE[3:0]#
MD[63:0]
MECC[7:0]
CKE
DRAM
Interface
A.G.P.
Interface
HCLKIN
PCLKIN
GTLREF
AGPREF
VTT
REF5V
RSTIN#
CRESET#
ECCERR#
BREQ0#
TESTIN#
Clocks,
Reset,
Test,
and
Misc.
LX_BLK
82443LX Block Diagram
2
1/29/98 1:26 PM 440LX_20.DOC
INTEL CONFIDENTIAL
(until publication date)
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. 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 may make changes to specifications and product descriptions at any time, without notice.
The 440LX AGPset may contain design defects or errors known as errata which may cause the product to deviate from
published specifications. Current characterized errata are available on request.
*Third-party brands and names are the property of their respective owners.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be
obtained from:
Intel Corporation
Call 1-800-548-4725
or visit the Intel web site at http:www.intel.com
COPYRIGHT © INTEL CORPORATION, 1997-1998
CG-041493
1/29/98 1:26 PM 440LX_20.DOC
INTEL CONFIDENTIAL
(until publication date)
INTEL 82443LX (PAC)
CONTENTS
E
PAGE
1.0. OVERVIEW..............................................................................................................................................9
2.0. SIGNAL DESCRIPTION ........................................................................................................................ 13
2.1. PAC Signals ....................................................................................................................................... 14
2.1.1. HOST INTERFACE SIGNALS ..................................................................................................... 14
2.1.2. DRAM INTERFACE SIGNALS..................................................................................................... 15
2.1.3. PCI INTERFACE SIGNALS ......................................................................................................... 20
2.1.4. A.G.P. INTERFACE SIGNALS..................................................................................................... 22
2.1.5. CLOCKS, RESET, AND MISCELLANEOUS SIGNALS ............................................................... 25
2.2. Power-Up/Reset Strapping Options .................................................................................................... 26
2.3. State of PAC Output and Bi-directional Signals During Hard Reset .................................................... 27
3.0. REGISTER DESCRIPTION.................................................................................................................... 29
3.1. Register Access ................................................................................................................................. 30
3.1.1. CONFADD—CONFIGURATION ADDRESS REGISTER............................................................. 30
3.1.2. CONFDATA—CONFIGURATION DATA REGISTER .................................................................. 31
3.1.3. CONFIGURATION SPACE MECHANISM ................................................................................... 31
3.1.3.1. Routing the Configuration Accesses to PCI or A.G.P. ........................................................... 31
3.1.3.2. PCI Bus Configuration Mechanism........................................................................................ 31
3.1.3.3. Mapping of Configuration Cycles on A.G.P. .......................................................................... 32
3.2. PCI Configuration Space (Device 0 and Device 1).............................................................................. 32
3.3. Register Set—Device 0 (Host-to-PCI Bridge) ..................................................................................... 35
3.3.1. VID—VENDOR IDENTIFICATION REGISTER (DEVICE 0) ........................................................ 35
3.3.2. DID—DEVICE IDENTIFICATION REGISTER (DEVICE 0) .......................................................... 35
3.3.3. PCICMD—PCI COMMAND REGISTER (DEVICE 0) ................................................................... 36
3.3.4. PCISTS—PCI STATUS REGISTER (DEVICE 0)......................................................................... 37
3.3.5. RID—REVISION IDENTIFICATION REGISTER (DEVICE 0) ...................................................... 38
3.3.6. SUBC—SUB-CLASS CODE REGISTER (DEVICE 0) ................................................................. 38
3.3.7. BCC—BASE CLASS CODE REGISTER (DEVICE 0).................................................................. 38
3.3.8. MLT—MASTER LATENCY TIMER REGISTER (DEVICE 0) ....................................................... 39
3.3.9. HDR—HEADER TYPE REGISTER (DEVICE 0).......................................................................... 39
3.3.10. APBASE—APERTURE BASE CONFIGURATION REGISTER (DEVICE 0) .............................. 39
3.3.11. CAPPTR—CAPABILITIES POINTER (DEVICE 0)..................................................................... 40
3.3.12. PACCFG—PAC CONFIGURATION REGISTER (DEVICE 0) .................................................... 41
3.3.13. DBC—DATA BUFFER CONTROL REGISTER (DEVICE 0) ...................................................... 42
3.3.14. DRT—DRAM ROW TYPE REGISTER (DEVICE 0) ................................................................... 43
3.3.15. DRAMC—DRAM CONTROL REGISTER (DEVICE 0) ............................................................... 44
3.3.16. DRAMT—DRAM TIMING REGISTER (DEVICE 0) .................................................................... 44
3.3.17. PAM—PROGRAMMABLE ATTRIBUTE MAP REGISTERS (PAM[6:0]) (DEVICE 0) ................. 46
3.3.18. DRB—DRAM ROW BOUNDARY REGISTERS (DEVICE 0)...................................................... 48
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INTEL CONFIDENTIAL
(until publication date)
E
INTEL 82443LX (PAC)
3.3.19. FDHC—FIXED DRAM HOLE CONTROL REGISTER (DEVICE 0) ............................................ 50
3.3.20. DRAMXC—DRAM EXTENDED CONTROL REGISTER (DEVICE 0) ........................................ 51
3.3.21. MBSC—MEMORY BUFFER STRENGTH CONTROL REGISTER (DEVICE 0)......................... 52
3.3.22. MTT—MULTI-TRANSACTION TIMER REGISTER (DEVICE 0) ................................................ 54
3.3.23. SMRAM—SYSTEM MANAGEMENT RAM CONTROL REGISTER (DEVICE 0) ....................... 55
3.3.24. ERRCMD—ERROR COMMAND REGISTER (DEVICE 0)......................................................... 56
3.3.25. ERRSTS0—ERROR STATUS REGISTER 0 (DEVICE 0).......................................................... 57
3.3.26. ERRSTS1—ERROR STATUS REGISTER 1 (DEVICE 0).......................................................... 59
3.3.27. RSTCTRL—RESET CONTROL REGISTER (DEVICE 0) .......................................................... 60
3.3.28. ACAPID—A.G.P. CAPABILITY IDENTIFIER REGISTER (DEVICE 0)....................................... 61
3.3.29. AGPSTAT—A.G.P. STATUS REGISTER (DEVICE 0) .............................................................. 62
3.3.30. AGPCMD—A.G.P. COMMAND REGISTER (DEVICE 0)........................................................... 62
3.3.31. AGPCTRL—A.G.P. CONTROL REGISTER (DEVICE 0) ........................................................... 63
3.3.32. APSIZE—APERTURE SIZE (DEVICE 0)................................................................................... 64
3.3.33. ATTBASE—APERTURE TRANSLATION TABLE BASE REGISTER (DEVICE 0)..................... 65
3.3.34. AMTT—A.G.P. INTERFACE MULTI-TRANSACTION TIMER REGISTER (DEVICE 0) ............. 65
3.3.35. LPTT—LOW PRIORITY TRANSACTION TIMER REGISTER (DEVICE 0)................................ 65
3.4. A.G.P. Configuration Registers—(Device 1) ....................................................................................... 66
3.4.1. VID1—VENDOR IDENTIFICATION REGISTER (DEVICE 1) ...................................................... 66
3.4.2. DID1—DEVICE IDENTIFICATION REGISTER (DEVICE 1) ........................................................ 66
3.4.3. PCICMD1—PCI-PCI COMMAND REGISTER (DEVICE 1) .......................................................... 66
3.4.4. PCISTS1—PCI-PCI STATUS REGISTER (DEVICE 1)................................................................ 67
3.4.5. RID1—REVISION IDENTIFICATION REGISTER (DEVICE 1) .................................................... 67
3.4.6. SUBC1—SUB-CLASS CODE REGISTER (DEVICE 1) ............................................................... 67
3.4.7. BCC1—BASE CLASS CODE REGISTER (DEVICE 1)................................................................ 68
3.4.8. HDR1—HEADER TYPE REGISTER (DEVICE 1)........................................................................ 68
3.4.9. PBUSN—PRIMARY BUS NUMBER REGISTER—DEVICE #1 ................................................... 68
3.4.10. SBUSN—SECONDARY BUS NUMBER REGISTER (DEVICE 1) ............................................. 69
3.4.11. SUBUSN—SUBORDINATE BUS NUMBER REGISTER (DEVICE 1)........................................ 69
3.4.12. SMLT—SECONDARY MASTER LATENCY TIMER REGISTER (DEVICE 1)............................ 69
3.4.13. IOBASE—I/O BASE ADDRESS REGISTER (DEVICE 1) .......................................................... 70
3.4.14. IOLIMIT—I/O LIMIT ADDRESS REGISTER (DEVICE 1)........................................................... 70
3.4.15. SSTS—SECONDARY PCI-PCI STATUS REGISTER (DEVICE 1) ............................................ 71
3.4.16. MBASE—MEMORY BASE ADDRESS REGISTER (DEVICE 1)................................................ 72
3.4.17. MLIMIT—MEMORY LIMIT ADDRESS REGISTER (DEVICE 1) ................................................ 72
3.4.18. PMBASE—PREFETCHABLE MEMORY BASE ADDRESS REGISTER (DEVICE 1) ................ 73
3.4.19. PMLIMIT—PREFETCHABLE MEMORY LIMIT ADDRESS REGISTER (DEVICE 1) ................. 73
3.4.20. BCTRL—PCI-PCI BRIDGE CONTROL REGISTER (DEVICE 1) ............................................... 74
5
1/29/98 1:26 PM 440LX_20.DOC
INTEL CONFIDENTIAL
(until publication date)
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