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**CS8221 NEW Enhanced AT (NEAT) (82C211/82C212/82C215/82C206) c86
***Info:
The CS8221 PC/AT compatible NEAT CHIPSet is an enhanced, high
performance 4 chip VLSI implementation (including the 82C206 IPC) of
the control logic used on the IBM Personal Computer AT. The flexible
architecture of the NEAT CHIPSet allows it to be used in any 80286
based system.
The CS8221 NEAT CHIPSet provides a complete 286 PC/AT compatible
system, requiring only 24 logic components plus memory devices.
The CS8221 NEAT CHIPSet consists of the 82C211 CPU/Bus controller, the
82C212 Page/interleave and EMS Memory controller. the 82C215
Data/Address buffer and the 82C206 Integrated Peripherals Controller
(IPC).
The NEAT CHIPSet supports the local CPU bus, a 16 bit system memory
bus, and the AT buses as shown in the NEAT System Block Diagram [see
datasheet]. The 82C211 provides synchronization and control signals
for all buses. The 82C211 also provides an independent AT bus clock
and allows for dynamic selection between the processor clock and the
user selectable AT bus clock. Command delays and wait states are
software configurable, providing flexibility for slow or fast peri-
pheral boards.
The 82C212 Page/interleave and EMS Memory controller provides an
interleaved memory sub-system design with page mode operation. It
supports up to 8 MB of on-board DRAM with combinations of 64Kbit,
256Kbit and 1Mbit DRAMs. The processor can operate at 16MHz with
0.5-0.7 wait state memory accesses, using 100 nsec DRAMs. This is
possible through the Page Interleaved memory scheme. The Shadow RAM
feature allows taster execution of code stored in EPROM, by down
loading code from EPROM to RAM. The RAM then shadows the EPROM for
further code execution. In a DOS environment, memory above 1Mb can be
treated as LIM EMS memory.
The 82C215 Data/Address buffer provides the buffering and latching
between the local CPU address bus and the Peripheral address bus. It
also provides buffering between the local CPU data bus and the memory
data bus. The parity bit generation and error detection logic resides
in the 82C215.
The 82C206 Integrated Peripherals Controller is an integral part of
the NEAT CHIPSet. It is described in the 82C206 Integrated Peri-
pherals Controller data book.
System Overview
The CS8221 NEAT CHIPSet is designed for use in 12 to 16 MHz 80286
based systems and provides complete support for the IBM PC/AT
bus. There are four buses supported by the CS8221 NEAT CHIPSet as
shown in Figure 1 [see datasheet]: CPU local bus (A and D), system
memory bus (MA and MD), I/O channel bus (SA and SD), and X bus (XA and
XD). The system memory bus is used to interface the CPU to the DRAMs
and EPROMs controlled by the 82C212. The I/O channel bus refers to
the bus supporting the AT bus adapters which could be either 8 bit or
16 bit devices. The X bus refers to the peripheral bus to which the
82C206 IPC and other peripherals are attached in an IBM PC/AT.
***Configurations:...
***Features:...
**CS8223 LeAPset [no datasheet] ?
**CS8225 CHIPS/250 PS/2 50/60 [no datasheet, some info] c88...
**CS8227 CHIPSlite (82C235/82C641) ?...
**CS8230 386/AT (82C301/302/303/304/305/306)cFeb87...
**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
***Info:
The 82C710 Universal Peripheral Controller (UPC) is a single chip
controller offering the complete I/P solution for the PC-XT & PC-AT
environments. The chip is an LSI implementation of the most commonly
used peripheral devices found in an IBM PC, XT or AT. It features 24
mA drivers for the output buffers, including the host data bus and
parallel port data bus. it incorporates one 16450 compatible UART, one
enhanced parallel port (with bi-directional capability), an IDE
compatible hard disk interface, a uPD72065B compatible floppy disk
controller, PS/2 type mouse logic, and various chip selects. Decoding
logic and support for main, auxiliary and standby power supplies and
software configurable base addresses for these devices, operational
modes and interrupts are also included. Power management aspects of
the 82C710 includes modular power down for each port, and software
oscillator disable. The hardware power management is done through the
PWRGD pin. When the chip is powered down (i.e. when PWRGD is inactive)
the current drawn is less than 250 microAmps, all the inputs are
disabled, and all outputs are tristated. The contents of all the
registers are preserved, as long as power supply to the 82C710 is
maintained.
The host interface is a PC compatible, (i.e. D0-D7, A0,A9, IOR, IOW,
AEN, MINTR, FINTR, PINTR, SINTR, and RESET), and can be connected
directly to the bus. The data buffers (D0-D7, PD0-PD7, IDED7) are
capable of sinking 24 mA @ 0.5V, the parallel port control signals are
open collector with internal pull up, and are capable of sinking 24 mA
@ 0.5V.
The UART implements a fully functional serial link. Programmable
character length, parity generation and detection, stop-bit generation
and baud rate generation are provided. Double buffering is used so
that precise synchronization is unnecessary. Status information is
accessible to the CPU by reading internal registers. MODEM control
lines are provided, as are internal diagnostic functionality and
interrupt prioritization. Support for an auxiliary power system (such
as that derived from a telephone line or R8232 link) permits a UPC in
a battery-powered device to consume no battery power until an incoming
character is detected.
The parallel port can be configured for output only (printer
application) or input and output (scanner application). The necessary
control signals are provided for use as a Centronics-compatible
(output only) parallel port. For scanner applications, a Cent-
ronics-like interface is used. Such an interface is utilized by the
RICOH 1830 scanner.
The configuration RAM and circuitry support programmable base
addresses for all registers internal to the UPC. This permits creation
of a menu-driven program for system configuration. Selection of
sources for interrupts, enabling and configuring of on-chip subsystems
(UARTs, parallel port, etc.) and control of the configuration process
itself are also handled with this RAM and its associated circuitry.
The remainder of this data sheet will consider each of the aforesaid
subsystems individually. Sections containing more general design data
for the chip as a whole are at the end along with electrical and
physical characteristics.
***Versions:...
***Features:...
**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:...
**Disk:...
**Video:...
*Contaq . . . . . [no datasheets, some info]...
*Efar Microsystems [no datasheets, some info]...
*ETEQ...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel...
**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...
**
**Later chipsets (basic spec):
**440 series:...
**450NX (?) 06/29/98:...
**????? (Profusion) c:99...
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