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**82495XP/490XP Cache Controller / Cache RAM (for i860) 06/05/91
***Notes:...
***Info:...
***Features:...
**82496/491 Cache Controller / Cache RAM (for P5 Pentium) 03/22/93...
**82497/492 Cache Controller / Cache RAM (for P54 Pentium) <Nov94...
**82498/493 Cache Controller / Cache RAM (for P54 Pentium) <Nov94...
**
**Later chipsets (basic spec):
**440 series:...
**450NX (?) 06/29/98:...
**????? (Profusion) c:99...
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**82C802G/GP System/Power Management Controller (cached) c:93
***Notes:...
***Info:...
***Configurations:...
***Features:
[features found only in the 802GP are marked in [] brackets ]
o Processor interface:
- Intel 80486SX, DX, DX2, SLe, DX4, P24T, P24D
- AMD 486SX, DX2, DXL, DXL2, Plus
- Cyrix DX, DX2, M7
- CPU frequencies supported 20, 25, 33, 40 and 50MHz
o Cache interface:
- Direct mapped cache
- Two banks interleaved or single bank non-interleaved
- 64, 128, 256 and 512K cache sizes
- Programmable wait states for L2 cache reads and writes
- 2-1-1-1 read burst and zero wait state write @ 33MHz
- No Valid bit required
[- Supports external single-chip cache modules from thyroid-party ]
[ vendors for high performance at 50MHz ]
- Supports CPUs with L1 write-back support
o DRAM interface:
- Up to 128MB main memory support
- Supports 256KB, 1MB, 4MB, and 16MB single- and double-sided SIMM
modules
- Read page hit timing of 3-2-2-2 at 33MHz
- Supports hidden, slow. and CAS-before-RAS refresh
- Four RAS lines to support four banks of DRAM
[- Eight RAS lines to support four banks of DRAM ]
- Programmable wait states for DRAM reads and writes
[- Programmable memory holes for supporting ISA memory ]
- Enhanced DRAM configuration map
[- Strong drivers on the MA lines (12/24mA) ]
[- Supports asymmetric DRAMs ]
o Power management:
- Support for SMM (System Management Mode) for system power
management implementations
- Programmable power management
[- CPU clock control ]
- Programmable wake-up events through hardware, software, and
external SMI source
- Multiple level GREEN support (NESTED_GREEN)
- STPCLK# protocol support
[- Programmable GREEN event timer ](802G only)
[- Individually programmable peripheral ](802GP only)
o ISA interface:
- 100% IBM PC/AT ISA compatible
[- Programmable edge- or level-trigger interrupts ]
- integrates DMA, timer and interrupt controllers
[- Slew rate control for output drivers ]
- Optional PS/2 style IRQ1 and IRQ12 latching
o VESA VL interface:
- Conforms to the VESA V2.0 specification
- Optional support for up to two VL masters
o Miscellaneous features: (802G only)
- Full support for shadow RAM, write protection, L1/L2
cacheability for video, adapter, and system BIOS
- Enhanced arbitration scheme
- Transparent 8042 emulation for fast CPU reset and GATEA20
generation
o [Miscellaneous features: ](802GP only)
[- Full support for flash, write protection, L1/L2 ]
[ cacheability for video, adapter, and system BIOS ]
[- Provides Micro Channel bridge support ]
[- 10-/16-nit I/O decodes ]
[- Enhanced arbitration scheme ]
o Packaging:
- Higher integration
- Reduced TTL count
- Low-power, high~speed 0.8-micron CMOS technology
- 208-pin PQFP (Plastic Quad Flat Pack)
**82C895 System/Power Management Controller (cached) c:Sep94...
**82C898 System/Power Management Controller (non-cache)c:Nov94...
**
**Support Chips:
**82C601/2 Buffer Devices <Nov94...
**82C822 PCIB (VLB-to-PCI bridge) c:94...
**Other:...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
**85C496/497 486-VIP 486 Green PC VESA/ISA/PCI Chipset <95
***Info:...
***Configurations:...
***Features:
o Host Bus
- Supports Intel 486, P24D, P24T, DX4, SL
- Enhanced 486, AMD 486, Enhanced Am486, and Cyrix M7/Cx 5x86
in 25/33/40/50 Mhz, 5V CPU.
o VESA Bus Slave
- Supports VESA Bus Specification Rev. 2.0p with Local Device
Target only.
o PCI Local Bus
- Supports PCI Bus Specification Rev. 2.0 with up to 4 PCI Masters
- Implements 3 Level Post Write Buffer for CPU write PCI Target
Memory Cycle.
- Supports Back to Back Single Memory Write to PCI Burst Write.
- Supports PCI Interrupt Steering with Four PIRQ Inputs.
- Supports PCI Master Burst Accesses On-Board Memory Up to 64
Double Word Long.
- Supports Concurrency PCI Bus.
- Snoop Filter and Advanced Snooping for Reducing CPU Snoops
During Sequential PCI Master Accesses On-Board Memory Cycles.
- Supports PCI Bus PCI to PCI Bridge.
o Supports L1 Cache Write Back CPU (P24T/P24D/M7/Enhanced Am486)
systems
o Supports Cx 5x86 Linear Burst Order Mode.
o L2 Cache Controller
- Write-Back or Write-Through Schemes
- Bank Interleave/Non-Interleave Cache Access
- Cache Size: 64K/128K/256K/512K/1MB
- 8 bit or 7 bit Tag (Combined Tag and Dirty SRAM) with
Direct-Mapped cache organization.
- Optional Separate Dirty SRAM.
o DRAM Controller
- Supports 8 Banks Non-Interleaved Access for Single and Double
Sided SIMMs up to 255 MBytes.
- Supports DRAM CAS Before RAS Refresh.
- Supports "Table-Free" DRAM configuration.
- Programmable driving current for the DRAM signals.
- Supports Symmetrical and Asymmetrical DRAMs.
- Supports 256K/512K/1M/2M/4M/8M/16M/32M xN Fast Page Mode and
EDO DRAM.
o Built-In Local Bus IDE Interface
- Supports Data Conversion for the Double Word Accessing
- Supports Symmetry Configuration for Channel 1 and Channel
0, PIO Mode IDE Hard Disks.
- Supports Mode 3 and above Timing.
- Supports Individual Drive Timing Setting for Optimal Performance
- Supports Posted Write Buffers and Pre-fetch Buffer.
- Supports Primary IDE or Secondary IDE Addressing (1Fx/17x)
o Fast-Slow Link Interface
- Linkage to ISA Bridge by FS-Link Interface.
- Fast Access to BIOS, ISA Memory Holes, and Interrupt Acknowledge
Cycle by FS-Link.
- Two Programmable Non-Cacheable Regions
- Two Programmable PCI Memory Holes and One Programmable ISA
Memory Holes.
o 208-Pin PQFP
o 0.6um Low Power CMOS Technology
**85C501/502/503 Pentium/P54C PCI/ISA Chipset <01/09/95...
**5101/5102/5103 Pentium/P54C PCI/ISA Chipset <04/02/95...
**5120 Pentium PCI/ISA Chipset (Mobile) <01/28/97...
**5501/5502/5503 Pentium/P54C PCI/ISA Chipset <04/02/95...
**5511/5512/5513 Pentium PCI/ISA <06/14/95...
**5571 (Trinity) Pentium PCI/ISA Chipset (75MHz) <12/09/96...
**5581/5582 (Jessie) Pentium PCI/ISA Chipset (75MHz) <04/15/97...
**5591/5592/5595 (David) Pentium PCI A.G.P. Chipset <01/09/98...
**5596/5513 (Genesis) Pentium PCI Chipset <03/26/96...
**5597/5598 (Jedi) Pentium PCI/ISA Chipset <04/15/97...
**530/5595 (Sinbad) Host, PCI, 3D Graphics & Mem. Ctrl.<11/10/98...
**540 (Spartan) Super7 2D/3D Ultra-AGP Single C.S.<11/30/99...
**55x SoC (System-on-chip) <03/14/02...
**
**Support chips:
**85C206 Integrated Peripheral Controller [no datasheet] ?...
**5595 Pentium PCI System I/O <12/24/97...
**950 LPC I/O <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...
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