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**82395SX Smart Cache 12/17/90
***Notes:...
**82396SX Smart Cache 12/17/90...
**82485 Turbo Cache (and 485Turbocache) c90...
**82489DX Advanced Programmable Interrupt Controller 10/12/92...
**82495DX/490DX DX CPU-Cache Chip Set <Sep91...
**82495XP/490XP Cache Controller / Cache RAM (for i860) 06/05/91...
**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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**5571 (Trinity) Pentium PCI/ISA Chipset (75MHz) <12/09/96
***Info:
[no general section in datasheet]
3. Functional Description
3.1 DRAM Controller
3.1.1 DRAM Type
The SiS5571 can support up to 384MBytes (3 banks) of DRAMs and each
bank could be single or double sided 64 bits FP (Fast Page mode) DRAM,
EDO (Extended Data Output) DRAM, and SDRAM (Synchronous DRAM)
DRAM. Half populated bank(32-bit) is also supported.
The installed DRAM type can be 256K, 512k, 1M, 2M, 4M or 16M bit deep
by n bit wide DRAMs, and both symmetrical and asymmetrical type DRAM
are supported. It is also permissible to mix the DRAMs (FP/EDO/SDRAM)
bank by bank and the corresponding DRAM timing will be switched
automatically according to register settings.
3.1.2 DRAM Configuration
The SiS5571 can support single sided or double sided DRAM modules for
each bank. The basic configurations are shown as the following:
3.1.3 Double-sided DRAM [omitted see datasheet]
3.1.4 Single-sided DRAM [omitted see datasheet]
3.1.5 DRAM Scramble Table [omitted see datasheet]
3.1.6 64-bit mapping table [omitted see datasheet]
3.2 DRAM Performance [omitted see datasheet]
3.3 CPU to DRAM Posted Write FIFOs
There is a built-in CPU to Memory posted write buffer with 8 QWord
deep ( CTMFF). All the write access to DRAM will be buffered. For the
CPU read miss / Line fill cycles, the write- back data from the second
level cache will be buffered first, and right after the data had been
posted write into the FIFO, CPU can performs the read operation by the
memory controller starting to read data from DRAMs. The buffered data
are then written to DRAM whenever no any other read DRAM request
comes. With this concurrent write back policy, many wait states are
eliminated. If there comes a bunch of continuous DRAM write cycles,
some ones will be pending if the CTMFF is full.
3.4 32-bit (Half-Populated) DRAM Access
For the read access, there will be either single or burst read cycle
to access the DRAM which depends on the cacheability of the cycle. If
the current DRAM configuration is half-populated bank, then the
SiS5571 will assert 8 consecutive cycles to access DRAM for the burst
cycle. For the single cycle that only accesses DRAM within a DWord,
the SiS5571 will only issue one cycle to access DRAM. For the single
cycle that accesses one Qword or cross DWord boundary, the SiS5571
will issue two consecutive cycles to access DRAM.
3.5 Arbiter
The arbiter is the interface between the DRAM controller and the host
which can access DRAMs. In addition to pass or translate the
information from outside to DRAM controller, arbiter is also
responsible for which master has higher priority to access DRAMs. The
arbiter treats different DRAM access request as DRAM master, and that
makes there be 5 masters which are trying to access DRAMs by sending
their request to the arbiter. After one of them get the grant from the
arbiter, it owns DRAM bus and begins to do memory data transaction.
The masters are: CPU read request, PCI master, Posted write FIFO write
request, and Refresh request. The order of these masters shown above
also stands for their priority to access memory.
3.6 Refresh cycle
The refresh cycle will occur every 15.6 us. It is timed by a counter
of 14Mhz input. The CAS[7:0]# will be asserted at the same time, and
the RAS[5:0]# are asserted sequentially.
3.7 PCI bridge
SiS5571 is able to operate at both asynchronous and synchronous PCI
clocks. Synchronous mode is provided for those synchronous system to
improve the overall system performance. While in the PCI master write
cycles, post-write is always performed. And function of Write Merge
with CPU-to-DRAM post-write buffer is incorporated to eliminate the
penalty of snooping write-back. On the other hand, prefetch is enabled
for master read cycles by default, and such function could be disabled
optionally. And, Direct-Read from CPU-to-DRAM post-write buffer is
implemented to eliminate the overhead of snooping write-back also. In
addition to Write-Merge and Direct-Read, Snoop-Ahead also hides the
overhead of inquiry cycles for master to main memory cycles. These key
functions, Write-Merge, Direct-Read and Snoop-Ahead, achieve the
purpose of zero wait for PCI burst transfer. The post-write and
prefetch buffers are both 16 Double-Word deep FIFOs.
3.8 Snooping Control [omitted see datasheet]
3.9 AHOLD/BOFF# Process and Arbiter Interface [omitted see datasheet]
3.10 Target Initiated Termination [omitted see datasheet]
3.11 DATA Flow [omitted see datasheet]
3.12 PCI Master Read/Write DRAM Cycle [omitted see datasheet]
***Configurations:...
***Features:...
**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...
**VL82C521/522 Lynx/M ?
***Info:
The VL82C520 Lynx/M chipset is VLSI's system solution optimized for
the expanding mobile Pentium market. Carrying forward VLSI's mobile
strategy and leveraging successful desktop innovations to offer a
complete solution, Lynx/M leaps forward and integrates the system
controller into a single Ball Grid Array (BGA) package. Included in
the Lynx/M solution is a PCI "Super I/O" controller that integrates
all the standard mobile peripherals. The Lynx/M offers a total
solution compatible with the Common Architecture industry standard
implementing highly efficient DDMA (Distributed DMA), Serial IRQ, and
features for primary PCI hot docking using a Common Architecture
compatible PCI to PCI bridge in the docking station.
Lynx/M System Controller; VL82C521
Packaged in a space-efficient low-profile 352 BGA, the Lynx/M System
Controller is the heart of the solution. BGA packaging allows
integrating functions usually partitioned into multiple packages. the
integrated functions include a 66Mhz CPU interface, 3.3V mobile PCI
2.1 compliant bus controller, 64-bit SDRAM, EDO, and FPM DRAM
controller with nine-deep fast access smart write-buffers, on-board L2
256KB write-back cache controller, and VLSI's WATTSmart power
management control. The DRAM interface provides drive for up to 24
memory devices thereby eliminating the need for external
drivers. Also, selecting SDRAM provides the opportunity to implement a
high performance system without an L2 cache.
Lynx/M Peripheral Controller; VL82C522
The Lynx/M chipset also includes a PCI Super I/O device, the Lynx/M
Mobile Peripheral Controller (MPC). This device, also packaged in a
low-profile 352 BGA, integrates a PCI 2.1 compliant bus interface, a
fully buffered Bus Mastering IDE controller, an '077 floppy disk
controller, Enhanced Capabilities Port (ECP), two 16550 UARTs with
modem functionality, an SMB/I2C bus, an IrDA 1.1 compatible Fast
Infrared communications port with ASK functionality, a Real-Time
Clock, two pulse-width modulator outputs (PWM), and a 33MHz 8052
microcontroller. Two on-board PLLs with buffering provide all the
required system clocks from only two crystal inputs, 14.318MHz and
32KHz.
A sub-ISA bus supporting 8- or 16-bit I/O or DDMA transfers, and ISA
Bus Mastering supports audio devices. Additionally, eight positive PCI
address decodes provide support to Sub-ISA peripherals.
The 8052 provides the keyboard controller functionality with built-in
scan for matrix keyboards and system boot controller functionality to
completely wake up any part or all of the system from any level of
suspend. The wake-up event can be a system event, timer, or any key
depression on the keyboard. The MPC also provides up to 25 GPIO pins
with expansion capabilities to provide flexible control of system
components.
Singular ROM architecture enabled by the integrated 8052 keyboard
controller saves both PCB space and cost by permitting a solitary ROM,
Flash, or SRAM device to be used for keyboard, graphics and system
BIOS.
WATTSMART Power Management
Incorporated in the Lynx/M chipset, the WATTSmart is a System
Management Mode-based power management system. WATTSmart includes
multiple system event monitoring, a watchdog timer, System Management
Interrupt (SMI) generation, multiple I/O traps, CPU Stop Clock
control, and provides three general purpose system Management I/O pins
(SMIOs) for control and monitoring of external devices.
Virtually all activity resources are available as speed up events and
to generate SMIs. SMIs can be generated by activity or after a period
of inactivity. An SMI that is generated from activity is generally for
a powered-down device, and the SMM handler can restore the device to
normal operation. An SMI from activity can also be used to resume the
system, start the clocks, etc.
Background
Lynx/M incorporates functions from previous desktop and mobile
chipsets. Baselinning from proven core system blocks and modifying to
reflect new market requirements allows VLSI to meet the Time-To-Market
expectations while minimizing risk.
Utilizing high-pin count BGA packaging allows Lynx/M to reduce board
space requirements by greater than 45%. this allows room on the PCB
for additional functionality while reducing the complexity of
multi-layer system boards.
Accessing VLSI's internal fab technology allows Lynx/M a path to an
advanced 0.6um CMOS process thereby achieving a true 3.3V system
without performance trade-offs.
***Configurations:...
***Features:...
**VL82C530 Eagle Ð c95...
**VL82C541/543 Lynx c95...
**VL82C591/593 SuperCore 590 c94...
**VL82C594/596/597 Wildcat c95...
**I/O Chips:
**VL82C106 Combination I/O chip ?...
**VL82C107 SCAMP Combination I/O chip ?...
**VL82C108 TOPCAT Combination I/O chip ?...
**VL82C110 Combination I/O chip ?...
**VL82C113 SCAMP Combination I/O chip ?...
**VL82C114 Combination I/O chip ?...
**Video: ...
**Disk:...
**Modems:...
**Other:...
**Not sure if they actually exist...
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