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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...
**
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**450NX (?) 06/29/98:...
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*SIS...
**85C496/497 486-VIP 486 Green PC VESA/ISA/PCI Chipset <95
***Info:
The SiS 486-VIP (VESA/ISA/PCI) chips are two-chip solution ideally for
Intel's 80486, SL Enhanced 486, P24D/P24T/DX4 CPU, AMD's 486, Enhanced
Am486 and Cyrix's Cx486 (M7)/Cx 5x86 CPU based on green AT system. By
supporting the most popular industrial standard system interfaces, it
provides flexible configurations for system design and applications.
The SiS85C496 PCI & CPU Memory Controller (PCM) integrates the Host
Bridge (Host Interface), the cache and main memory DRAM Controller,
the PCI Bridge, the built-in IDE Controller, and the FS-Link Bus (Fast
Slow Link Bus). It provides the address paths and bus control for
transfers among the Host (CPU/L1 cache), main memory (L2 cache and
DRAM), the Peripheral Component Interconnect (PCI) Bus, and the
FS-Link Bus. The L2 cache controller supports both write-through and
write-back cache policies and cache sizes up to 1 MBytes. The cache
memory can be built using standard asynchronous SRAMs. The main
memory DRAM controller interfaces DRAM to the Host Bus, PCI Bus, and
FS-Link Bus. Up to eight single sided SIMMs or four double sided SIMMs
provide a maximum of 255 MBytes of main memory. The installation of
DRAM SIMMs is "Table-Free", which allows the SIMMs be installed into
any slot location and any combinations. The built-in IDE hard disk
controller allows CPU accessing hard disk and also provides higher
system integration with lower system cost. The 85C496 is intended to
be used with the SiS85C497 which is a AT Bus Controller with built-in
206 controller.
The SiS85C497 AT Bus Controller and Megacells (ATM) provides the
interface between PCI/CPU/Memory Bus (fast machine) and the ISA Bus
(slow machine). It also integrates many of the common I/O functions
in today's ISA based PC systems. The 85C497 comprises the FS-Link
interface (Fast-Slow Link interface), ISA bus controller , DMA
controller and data buffers to isolate the FS-Link Bus from the ISA
Bus and to enhance performance. It also integrates a 14 channel
edge/level interrupt controller, refresh controller, a 8-bit BIOS
timer, three programmable timer/counters, non-maskable-interrupt (NMI)
control logic, Power Management Unit, and RTC. Figure 1 .1 [see
datasheet] shows the system block diagram.
***Configurations:...
***Features:...
**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
***Info:
The SIS950 is a LPC Interface based highly integrated Super I/O. The
SIS950 provides the most commonly used legacy Super I/O functionality
plus the latest Environment Control initiatives, such as Hardware
Monitor, Fan Speed Controller and SiS’s "SmartGuardian" function. The
device’s LPC interface complies with Intel "LPC Interface
Specification Rev. 1.0" (Sept. 29, 1997). The SIS950 meets the
"Microsoft PC98 & PC99 System Design Guide" requirements and is ACPI
compliant.
The SIS950 features the enhanced hardware monitor providing 3 thermal
inputs from remote thermistors, thermal diode or diode-connected
transistor (2N3904). The device also provides the SiS innovative
intelligent automatic Fan ON/OFF & speed control functions
(SmartGuardian) to reduce overall system noise and power consumption.
The SIS950 has integrated nine logical devices, featuring an
Environment Controller (controls three Fans). The Environment
Controller has temperature, voltage and Fan Speed monitors. One Fan
Speed Controller is responsible to control three fan speeds through
three 128 steps of Pulse Width Modulation (PWM) output pins and to
monitor three fan's tachometer inputs.
Other features include one high-performance 2.88MB floppy disk
controller, with digital data separator, supporting two 360K/ 720K/
1.2M/ 1.44M/ 2.88M floppy disk drives. One multi-mode high-performance
parallel port features the bi-directional Standard Parallel Port
(SPP), the Enhanced Parallel Port (EPP V. 1.7 and EPP V. 1.9 are
supported), and the IEEE 1284 compliant Extended Capabilities Port
(ECP). Two 16C550 standard compatible enhanced UARTs perform
asynchronous communication, and support IR, one consumer remote
control (TV remote) IR, one MPU-401 UART mode compatible MIDI port,
one game port with built-in 558 quad timers and buffer chips to
support direct connection of 2 joysticks, and six ports (48 GPIO
pins). There is also a flash ROM interface with Address (FA[0:18]),
Data (FD[0:7]), and supporting three control signals FCS#, FWE# and
FRD#. In addition, a SmartGuardian engine is provided to monitor the
system condition and reacts to the detected condition accordingly.
These nine logical devices can be individually enabled or disabled via
software configuration registers. The SIS950 utilizes power-efficient
circuitry to reduce power consumption. Once a logical device is
disabled, the inputs are gated inhibit, the outputs are TRI-STATE and
the input clock is disabled. The SIS950 requires a single 48/24 MHz
clock input and operates with a single +5V power supply.
The SIS950 is available in 128-pin PQFP (Plastic Quad Flat Package).
***Versions:...
***Features:...
**Other:...
**PII/III/Pro...
**Athlon etc...
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*TI (Texas Instruments)...
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