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**82496/491     Cache Controller / Cache RAM (for P5 Pentium) 03/22/93
***Notes:...
***Info:...
***Configurations:...
***Features:...
**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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*OPTi...
**82C546/547     Python PTM3V                                     c:94
***Notes:...
***Info:
The  OPTi Python  Chipset provides  a highly  integrated  solution for
fully  compatible, high-performance  PC/AT  platforms. Together,  with
OPTi's  82C206 Integrated  Peripheral Controller  (IPC),  this chipset
will  support the  Pentium processor  in the  most cost  effective and
feature-rich designs available  today. This highly integrated approach
provides  the  foundation  for   a  cost  effective  platform  without
compromising performance. The OPTi  Python Chipset supplies a powerful
solution  positioned  to  deliver  value without  neglecting  quality,
compatibility, or reliability.

The  Python Chipset  is  comprised  of two  chips,  the 82C547  System
Controller (SYSC) and  the 82C546 AT Bus Controller  (ATC). A complete
Pentium  processor solution  consists of  the Python  Chipset  and the
82C206 Integrated Peripheral Controller (IPC).

82C546 (ATC) AT Bus Controller
The 82C546  ATC integrates the AT  bus interface and  data buffers for
transfers between the  CPU data bus, local data bus  and the DRAM data
bus. It also provides the ISA to local bus command translation.

o 208-pin PQFP
o Data bus buffer (host data to memory data)
o Data bus buffer control (ISA to memory)
o Parity generation and detection circuitry
o Keyboard controller chip select
o Local bus interface (ISA to local bus command translation)

82C547 (SYSC) System Controller
The  82C547 SYSC  provides  the  control functions  for  the host  CPU
interface, the  32-bit local  bus interface, the  64-bit Level  2 (12)
cache and  the 64-bit DRAM bus.  The SYSC also controls  the data flow
between the CPU bus, the DRAM bus, the local bus, and the 8/16-bit ISA
bus.

o 160-pin PQFP
o Pentium CPU interface
o DRAM controller
o L2 cache controller
o Ll cache controller
o Local bus interface
o Reset generation
o Arbitration logic
o Data bus buffer control (memory data to/from host data)
o Extended DMA page register
o Keyboard emulation of A20M# and CPU warm reset
o Port B and Port 92h Register

82C206 (IPC) Integrated Peripherals Controller
The 82C206  IPC provides two  DMA controllers, two  interrupt control-
lers, one timer/counter, and a real-time clock in an industry standard
single-chip  solution  for  the  peripherals  attached  to  the  PC/AT
peripheral bus.

o 84-pin PLCC or 100-pin PQFP
o Supports four DMA transfer modes
o Special Commands provided for ease of programming

Support Chips
The  82C606A and 82C606B  are two  buffer/translation devices  used to
translate  3.3V signals to  5.0V signal  levels in  Python motherboard
solutions. These devices buffer the CPU  address bus to the ISA and VL
address buses, the  82C546 ATC's memory data bus to  the ISA data bus,
the peripheral  XD bus  to the ISA  SA and  SD buses. The  82C606A and
82C606B integrate  a number of  glue logic TTL  devices (approximately
eleven), hence  reducing the  amount of TTL  on the  motherboard.  The
82C606A  and 82C606B  devices are  actually the  same device  with two
strapping options. Pulling the CONFI/2#  pin high causes the device to
function in the 82C606A Mode.  Pulling the CONFII2# pin low configures
the device to function in the 82C606B Mode of operation.

o 100-pin PQFP
o Mixed voltage to support 3.3V to 5.0V signal translation
o Two devices replace approximately eleven TTL devices

***Configurations:...
***Features:...
**82C556/7/8     Viper [no datasheet]                                ?...
**82C556/7/8N    Viper-N  Viper Notebook Chipset             <05/25/95...
**82C556M/7M/8E  Viper-N+ Viper Notebook Chipset                  c:96...
**82C566/7/8     Viper-Max Chipset Scalable MultiMedia PC Solution   ?...
**82C571/572     486/Pentium                                      c:93...
**82C576/7/8     Viper Xpress  [no datasheet]                        ?...
**82C576/8/9     Viper XPress+ [no datasheet, some info]     <01/16/97...
**82C596/597     PTMAWB Pentium Adaptive Write-back (Cobra)       c:93...
**82C650/1/2     Discovery (Pentium Pro) [no datasheet]              ?...
**82C681/2/6/7   386/486WB EISA                                   c:92...
**82C683         386/486AWB EISA [no datasheet]                      ?...
**82C693/6/7     Pentium uP Write Back Cache EISA                 c:93...
**82C700         FireStar                                         c:97...
**82C701         FireStar Plus                                    c:97...
**82C750         Vendetta      [no datasheet]                        ?...
**82c801         SCWB2 DX Single Chip Solution                    c:92...
**82C802         SCWB2 PC/AT Single Chip [no datasheet]              ?...
**82C802G/GP     System/Power Management Controller (cached)      c:93...
**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...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
**W83C553F    System I/O Controller With PCI Arbiter           c:sep95
***Info:...
***Versions:...
***Features:
High Integration PCI-ISA solution
o  Optimized for lowest system cost
o  Complies with PCI Revision 2.0 specification
o  Universal PCI device supporting x86 and PowerPC (non-x86) modes of 
   operation

Nand tree on most signal pins to facilitate board level testing in PCB 
manufacturing environment

Integrated PCI Bus Master IDE controller
o  Dual channel Bus Master IDE for up to 4 peripherals, including hard 
   drives, ATAPI (IDE) CD-ROMs, tapes, etc.
o  Multi-threading capability allows two simultaneous I/O processes
o  Independent IDE Timing registers allow fast/slow devices on the 
   same cable
o  Two independent DMA channels for Bus Master scatter/gather DMA 
   transfers across the PCI bus
o  Large 64 byte DMA FIFO for zero wait state PCI burst transfers
o  Support for multiword DMA Mode 1 (13.3 MB/s), Mode 2 (16.6 MB/s) 
   IDE drives
o  PIO IDE support for Modes 0-4 disks
o  Edge rate controlled outputs directly drive IDE headers
o  Four byte pre-fetch and posted write buffers
o  DMA channels can be re-configured for P-n-P motherboard devices
o  Software and register set compatible with Intel Bus Master PCI-IDE 
   specification (SFF 8038i)
o  Supported by existing device drivers for MS-DOS, Windows, NT 3.1, 
   NT 3.5x, NT4.0, OS/2 2.1, OS/2 Warp, NetWare 3.12 and 4.x**
o  Recompiled PowerPC device drivers also available

>** OS/2, Novell driver by DTC

PCI Arbiter
o  Supports CPU, IDE, ISA and five additional bus masters
o  Programmable access windows allow fine tuning of PCI access for 
   each bus master
o  Can be disabled on power-up via strapped pin

Power Management Break Event support for Green PC applications

Built-in Integrated Peripheral Controller (IPC) with standard PC-AT 
peripherals

o  Two 82C37A DMA controllers (types A, B, and F)
   - 32-bit addressing allows use of alternate CPUs, such as PowerPC
   - supports multiple 8-bit and 16-bit scatter/gather DMA channels
o  Two 82C59A interrupt controllers
   - all IRQ inputs may be programmed for edge or level sensitivity
o  One 82C54 counter/timer
o  Routes external PCI interrupts to a software-selectable interrupt 
   channel

PCI Bus Interface
o  PCI Revision 2.1 compliant
o  PCI clock frequencies up to 33 MHz at 5V
o  Supports delayed completion for ISA cycles
o  Active address decoding for internal I/O devices
o  Subtractive decoding for ISA bridge, KBC and RTC
o  Supports disconnection (with retry) for slow internal accesses to 
   improve latency
o  Short PCI bus ownership when mastering to minimize overall system 
   latency
o  Fast DMA transfers from I/O devices to PCI agents as a master
o  Separate request and grant signals for ISA DMA and IDE controllers

ISA Bus Bridge
o  Full implementation of a standard ISA bus
o  Separate ISA and IDE data buses reduce noise and increase system 
   performance
o  Synchronous PCI-to-ISA interface with direct drive for 5 ISA slots

XD-Bus interface
o  Support for BIOS ROM or PowerPC systems boot ROM
o  Support for flash EPROM
o  Provides keyboard controller connections
o  Provides real-time clock connections
o  Provides data buffer control

Miscellaneous
o  Port B support
o  Port 92 support

Uses  0.6um, ultra-low  power CMOS  technology for  Rev. E  and below;
0.5um for Rev. G.  Packaged in a 208-pin PQFP package

**W83628F/29D PCI TO ISA Bridge Set                                c98...
**W83626F/D   LPC TO ISA Bridge Set                                <00...
**
**Multi I/O:
**W83757          SUPER I/O  CHIP                                  <92...
**W83767F         ??           Multi I/O  [no datasheet]
**W83777F/87F     Power I/O   (Multi I/O)                          <95...
**W83877F         WINBOND I/O (Multi I/O)                          <96...
**W83877TF/TG/TD  WINBOND I/O (Multi I/O)                          c97...
**W83977F/G/AF/AG WINBOND I/O (Multi I/O)                          c97...
**W83977TF        WINBOND I/O (Multi I/O)                          c97...
**W83977EF        WINBOND I/O (Multi I/O)                          <98...
**W83977ATF       WINBOND I/O (Multi I/O)                          <98...
**
**Disk Controller:
**W83759/A/F/AF   Advanced VL-IDE Disk Controller                  <96...
**W83769          Local Bus IDE Solution                           <94...
**
**UARTS:
**W86C250A  UART (equivalent of INS8C250A) [no datasheet]
**W86C450/P Universal Asynchronous Receiver/Transmitter         <Jul89...
**W86C451   I/O controller for IBM PC/AT/XT                     <Jul89...
**W86C452   I/O controller for IBM PC/AT                         Jul89...
**W86C456   I/O controller [no datasheet]                            ?
**W860551/P UART with FIFO and Printer Port Controller             <94...
**
**Other:...
*ZyMOS...
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