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**CS8230   386/AT                   (82C301/302/303/304/305/306)cFeb87
***Notes:...
***Info:
The CS8230-16-20-25 AT/386 CHIPSet is a seven chip VLSI implementation
of most of  the system logic to control an iAPX  386 based system. The
CHIPSet  is designed  to  offer  a 100%  PC  AT compatible  integrated
solution.  The  flexible architecture of  the CHIPSet allows it  to be
used in any iAPX386 based system design, such as CAD/CAE workstations,
office systems, industrial and financial transaction systems.

CS8230  CHIPSet  combined with  CHIPs  82C206, Integrated  Peripherals
Controller, provides a complete PC  AT compatible system using only 40
components plus memory devices.

The CS8230 CHIPSet  consists of one 82C301 Bus  Controller, one 82C302
Page/Interleave Memory  Controller, one each of 82A303  and two 82A304
Address Bus Interfaces, two 82A305  or 82B305 Data Bus Interfaces, and
a 82A306 Control  Signal Buffer. An all CMOS  CS8232-16, and CS8232-20
CHIPSet  allow OEM's to  reduce the  form factor,  size and  weight of
their portable, laptop machines due to the reduced power requirements,
the   reduced   cooling  requirements   and   the  reduced   buffering
requirements of the CHIPSet. In particular, the all CMOS CS8232-16 and
CS8232-20 CHIPSet will reduce a system's power consumption requirement
by at least half that of an NMOS/BIPOLAR/CMOS based system.

The only difference between the  CS8232 CHIPSet and the CS8230 CHIPSet
is  that the  bipolar parts  (82A303, 82A304,  82A305, 82A306)  in the
CS8230  CHIPSet have been  replaced with  CMOS parts  (82C303, 82C304,
82C305, 83C306). The difference between the new CMOS parts is that the
drive capability is 12 mA as opposed to 24 mA in the bipolar parts.

The CHIPSet supports a local CPU  bus, a 32-bit system memory bus, and
AT buses  as shown  in the System  Block Diagram [see  datasheet]. The
82C301 and 82A306/82C306 provide the generation and synchronization of
control signals for all buses. The 82C301 also supports an independent
AT bus clock, and allows  for dynamic selection of the processor clock
between  the 16-20-25MHz  clock  and  the AT  bus  clock.  The  82A306
provides  buffers  for  bus   control  signal  in  addition  to  other
miscellaneous logic functions.

The 82C302  Page/Interleave Memory Controller  provides an interleaved
memory subsystem design with page  mode operation. It supports 1 MB to
16 MB  of DRAMs with  combinations of 256Kbit  and 1 Mbit  DRAMs.  The
processor  can operate  at 16-20-25  MHz with  zero wait  state memory
accesses.

The  82A303/82C303  and 82A304/82C304  interface  between all  address
buses and the  addresses needed for proper data  path conversion.  Two
82A305/82C305/82B305 are  used to interface between  the local, system
memory, and AT  data buses. In addition to  having high current drive,
they also perform the conversion necessary between the different sized
data paths.

System Overview
The CS8230  is designed  for use in  80386-based systems  and provides
complete support for the IBM PC AT bus. There are four buses supported
by  the  CS8230 as  shown  in the  AT/386  system  block diagram  [see
datasheet]: the CPU local bus (A and D), the system memory bus (MA and
MD. the IO  Channel bus (SA and SD),  and the X bus (XA  and XD).  The
system memory  bus is  used to interface  to DRAM's controlled  by the
82C302. The  IO channel bus  refers to the  bus supporting the  AT bus
adapters which could be either 8  bit devices or 16 bit devices. The X
bus  refers to the  peripheral bus  to which  the DMA  controllers and
timers are attached in an IBM PC  AT. The X bus has only an 8-bit data
path. The term "AT  bus" is used to refer to the  IO channel bus and X
bus. Provisions are also made for  user extension of the IO channel to
a 32 bit bus.

***Configurations:
CS8230-16 is a 16Mhz set
CS8230-20 is a 20Mhz set 
CS8230-25 is a 25Mhz set 

Configurations:
82C301 BUS CONTROLLER 
82C302 PAGE/INTERLEAVE MEMORY CONTROLLER 
82A303 HIGH ADDRESS BUFFER 
82A304 LOW ADDRESS BUFFER 
82B305 DATA BUFFER 
82A306 CONTROL BUFFER 
and
82C206

also sometimes the 82C296 instead of the 82C206.

Note that different speeds use slightly different parts no:

CS8230-16 CS8230-20 CS8230-25 
-----------------------------
82C301    82C301-20 82C301-25 
82C302    82C302-20 82C302-25 
82A303    82A303    82A303 
82A304    82A304    82A304 
82A305    82B305    82B305 
82A306    82A306    82A306 

"82A305" *may* be a typo.

Parts are often marked:
CHIPS P82C301C 20Mhz or
CHIPS P82C302C 20Mhz

The 'C' at the end of the part *may* refer to parts that don't support
the 387

***Features:...
**CS8231   TURBO CACHE-BASED 386/AT (82C301/307/303/304/305/306)   c86...
**CS8232   CMOS 386/AT              (82C301/302/303/304/305/306)   c86...
**CS8233   PEAK/386 AT (Cached)     (82C311/82C315/82C316)     c:Dec90...
**CS8236   386/AT                   (82C301/2/3/4/5/6/206)         c86...
**CS8237   TURBO CACHE-BASED 386/AT (82C301/7/3/4/5/6/206)         c86...
**CS8238   CHIPS/280 & 281 (386 MCA)(82C321/322/325/223/226)   c:Aug89...
**CS82310  PEAK/DM 386 AT           (82C351/82C355/82C356)         c91...
**CS8281   NEATsx (386SX)           (82C811/812/215/206)       c:Dec89...
**CS8283   LeAPset-sx               (82C841/82C242/82C636)     c:Mar90...
**CS8285   PEAKsx                   (82C836/82C835)                c91...
**CS8288   CHIPSlite-sx             (82C836/82C641/82C835)          c?...
**CS4000   WinCHIPS                 (64200/84021/84025)            c92...
**CS4021   ISA/486                  (84021/84025)                  c92...
**CS4031   CHIPSet                  (84031/84035)              5/10/93...
**CS4041/5 CHIPSet                  (84041/84045)              2/10/95...
**CB8291   ELEAT                    [no datasheet]                 c90...
**CB8295   ELEATsx                  [no datasheet]                 c90...
**82C100   IBM PS/2 Model 30/Super XT                                ?...
**82C110   IBM PS/2 Model 30/Super XT                                ?...
**82C235   Single Chip AT (SCAT)                                   c89...
**82C836   Single Chip 386sx (SCATsx)                              <91...
**F8680/A  PC/CHIP Single-Chip PC                                  c93...
**
**Support Chips:
**64200    (Wingine) High Performance 'Windows Engine'         c:Oct91...
**82C206   Integrated Peripheral Controller                        c86...
**82C601/A Single Chip Peripheral Controller                 <08/30/90...
**82C607   Multifunction Controller                             <Jun88...
**82C710   Universal Peripheral Controller                     c:Aug90...
**82C711   Universal Peripheral Controller II                  c:Jan91...
**82C712   Universal Peripheral Controller II                  c:Jan91...
**82C721   Universal Peripheral Controller III                 c:May93...
**82C735   I/O Peripheral Controller With Printgine            c:Jul93...
**82C835   Single CHIP 386sx AT Cache Controller               c:Apr91...
**F87000   Multi-Mode Peripheral Chip                         11/23/93...
**Other:...
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*Intel...
**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...
**
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**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
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