PRELIMINARY

This document contains information on a product under development at Advanced Micro Devices. The information
is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed
product without notice.

Publication# 21446

Rev: A Amendment/0

Issue Date: April 1997

Net186-EVAL-KT

Am186 ES and PCnet-ISA II Based Stand-Alone
Evaluation Platform

DISTINCTIVE CHARACTERISTICS

Am186 ES-40 MHz Microcontroller

-- 80C186 compatibility

-- Glueless interface to PSRAM, SRAM, FLASH,

and ROM memory systems

-- Demultiplexed address/data bus

-- Two DMA channels

-- 32 programmable I/O (PIO) pins

Am79C961A PCnet-ISA II Ethernet Controller

-- Single-chip Ethernet controller for direct

interface to ISA and EISA buses

-- Supports IEEE 802.3/ANSI 8802-3 Ethernet

standards

-- Supports full duplex operation on the

10Base-T, AUI and GPSI ports

-- Supports Magic PacketTM Technology for

waking up remote Ethernet nodes

-- Software compatible with Am7990/Am79C90

LANCETM/CLANCETM register and descriptor
architecture

Communication Ports

-- Two RS-232 serial por ts driven by the

Am186ES via two DB-9 DCE connectors

-- One 10Base-T Ethernet port driven by the

PCnet-ISA II via an RJ-45 connector

Expansion Bus

-- Am186 Expansion Interface

Memory

-- One 512Kbytes SRAM

-- One 512Kbytes FLASH (Am29F400)

-- Capable of addressing up to 1Mbytes of

FLASH software

-- E86MON monitor program with source code

-- Utility programs for PCnet-ISA II with source

codes

-- PAL equations for board setup

GENERAL DESCRIPTION

The Net186 evaluation board meets the needs of cus-
tomers working with embedded networking control
applications using the Am186ES microcontroller and
the PCnet-ISA II single-chip Ethernet controller. This
board provides a complete stand-alone, microcontrol-
ler and Ethernet-based evaluation in a low-cost, excep-
tionally small form-factor product.

This evaluation board features the Am186ES, high-per-
formance, 80C186-compatible, 16-bit embedded con-
troller, and the PCnet-ISA II high performance, 16-bit,
single-chip Ethernet controller for ISA.

The microcontroller section consists of the Am186ES,
512 Kbytes FLASH and 512 Kbytes SRAM. The Ether-
net section consists of a PAL for glue logic and the
Am79C961A PCnet-ISA II. The design takes advan-
tages of the Bus Mastering capability of the PCnet-ISA
II to achieve high performance and low system cost,
while reducing the amount of software overhead on the
microcontroller.

Communication with the Net186 can be accomplished
through either one of the two RS-232 serial ports or
t h r o u g h t h e h i g h s p e e d 1 0 M b p s E t h e rn e t
10Base-T port.

Am186ES Microcontroller

The Am186ES microcontroller and its companion
Am188ES microcontroller integrate the functions of the
CPU, non-multiplexed address bus, three timers, a
watchdog timer, chip selects, interrupt controller, two
DMA controllers, PSRAM controller, asynchronous
serial ports, programmable bus sizing, and program-
mable I/O (PIO) pins on one chip. Compared to the
80C186/188 microcontrollers, the Am186ES and the
Am188ES microcontrollers can reduce the size, power
consumption, and cost of embedded systems, while in-
creasing reliability, functionality, and performance.

The Am186ES and Am188ES microcontrollers are part
of the AMD E86 family embedded microcontrollers and

Am186TMES

P R E L I M I N A R Y

microprocessors based on the x86 architecture. The E86
family includes the 80C186, 80C188, 80L186, 80L188,
Am186EM, Am188EM, Am186EMLV, and Am188EMLV
m i c r o c o n t r o l l e r s, a s we l l a s t h e A m 3 8 6 TM S X ,
Am386TMDX, and Am486TMDE microprocessors.

PCnet-ISA II Ethernet Controller

The Am79C961A PCnet-ISA II Ethernet controller, a sin-
gle-chip Ethernet controller, is a highly integrated

bus-

mastering

Ethernet controller with a built in ISA bus and

PHY layer (Manchester Encoder/Decoder and 10Base-
T transceiver). The 16-bit ISA interface makes an ideal
straightforward connection to an x186 style local bus.
The PCnet-ISA II has two features which, while not im-
plemented in the Net186, would be very useful for cer-
tain embedded networking control applications: full
duplex operation (making it possible to transmit and re-
ceive packets at the same time, for a combined bidirec-
tional data transfer rate of up to 20 Mbps) and Magic

Packet Technology (making it possible to remotely wake
up a sleeping system on an Ethernet node).

The PCnet-ISA II is available in either 132-pin PQFP
(plastic quad flat package) or 144-pin TQFP (thin quad
flat package). The Net186 is available in the 144-pin
TQFP, specifically designed to reduce part count and
cost, and to address applications where higher system
throughput is desired.

The PCnet-ISA II Ethernet controller is part of the
AMD PCnet family of single-chip Ethernet controllers
based on the original LANCE/CLANCE architecture.
Other members include the Am79C965 PCnet-32 (for
VL or other general 32-bit bus environments) and the
Am79C970A PCnet-PCI II (for PCI bus environ-
ments). Like the PCnet-ISA II, the PCnet-32 and the
PCnet-PCI II are 10 Mbps Ethernet controllers. The
last member of the PCnet family is the Am79C971
PCnet-

FAST

, a 10/100 Mbps Ethernet controller.

BLOCK DIAGRAM

UCS

186ES

INT0

HOLD

HLDA

ARDY

LCS

MCS0

22V10

EEPROM

29F400

(512Kb)

BYTE
CE

256X16 SRAM

(512Kb)

IOR IOW MEMR MEMW

IRQ

DRQ

DACK

IOCHRDY

AEN

REF

IOCS16

SMEMR

RESET

79C961A

TL7705A

RESET

RES

RD
WHB
WLB

RD
WHB
WLB
MEMWR
MEMRD

10Base-T

N/C

+5 V

20 MHz

20, 25
33, 40
MHz

2 Each
RS-232

HLDA

CLKA

LCS

ADX0

WHB

WLB

+5 V

UCS

ADX

DATA

IRQ

HOLD

IOCHRDY

AEN

RCS

SBHE

HLDA

MASTER

MEMWR

RCS

MEMRD

Электронный компонент: NET186-EVAL-KT

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