PRELIMINARY
Am186 EM/EMLV and Am188 EM/EMLV
TM
TM
High Performance, 80C186-/80C188-Compatible and
80L186-/80L188-Compatible, 16-Bit Embedded Microcontrollers
DISTINCTIVE CHARACTERISTICS
TM
n E86 family 80C186- and 80C188-compatible
microcontrollers with enhanced bus interface
— Lower system cost with higher performance
— 3.3- V ±.3 -V ope ra tio n (A m1 86E MLV and
Am188EMLV microcontrollers)
n High performance
— 20-, 25-, 33-, and 40-MHz operating frequencies
— Supports zero-wait-state operation at 25 MHz
with 110-ns static memory (Am186TMEMLV and
Am188 TM EMLV microcontrollers) and 40 MHz
with 70-ns static memory (Am186 TM EM and
Am188TMEM microcontrollers)
— 1-Mbyte memory address space
— 64-Kbyte I/O space
n New features provide faster access to memory and
remove the requirement for a 2x clock input
— Nonmultiplexed address bus
— Phase-locked loop (PLL) allows processor to
operate at the clock input frequency
n New integrated peripherals provide increased
functionality while reducing system cost
— Thirty-two programmable I/O (PIO) pins
n
n
n
n
— Asynchronous serial port allows full-duplex, 7-bit
or 8-bit data transfers
— Synchronous serial interface allows half-duplex,
bidirectional data transfer to and from ASICs
— Pseudo static RAM (PSRAM) controller includes
auto refresh capability
— Reset configuration register
Familiar 80C186/80L186 peripherals
— Two independent DMA channels
— Programmable interrupt controller with six
external interrupts
— Three programmable 16-bit timers—timer 1 can
be used as a watchdog interrupt timer
— Programmable memory and peripheral
chip-select logic
— Programmable wait state generator
— Power-save clock divider
Software-compatible with the 80C186/80C188
and 80L186 /80L188 microcontrollers
Widely available native development tools,
applications, and system software
Available in the following packages:
— 100-pin, thin quad flat pack (TQFP)
— 100-pin, plastic quad flat pack (PQFP)
GENERAL DESCRIPTION
The Am186TMEM/EMLV and Am188TMEM/EMLV microcontrollers are the ideal upgrade for 80C186/188 and
80L186/188 microcontroller designs requiring 80C186/
188 and 80L186/188 microcontroller compatibility, increased performance, serial communications, and a direct bus interface. The Am186EM/EMLV and
Am188EM/EMLV microcontrollers increase the performance of existing 80C186/188 and 80L186/188 systems while decreasing their cost.
The Am186EM/EMLV and Am188EM/EMLV microcontrollers are part of the AMD E86 family of embedded microcontrollers and microprocessors based on the x86
architecture. The E86 family includes the 16- and 32-bit microcontrollers and microprocessors described on page 8
The Am186EM/EMLV and Am188EM/EMLV microcontrollers integrate the functions of the CPU, nonmultiplexed address bus, timers, chip selects, interrupt
controller, DMA controller, PSRAM controller, asynchronous serial port, synchronous serial interface, and programmable I/O (PIO) pins on one chip. Compared to the
80C186/188 and 80L186/188 microcontrollers, the
Am186EM/EMLV and Am188EM/EMLV microcontrollers enable designers to reduce the size, power consumption, and cost of embedded systems, while
increasing functionality and performance.
The Am186EM/EMLV and Am188EM/EMLV microcontrollers have been designed to meet the most common
requirements of embedded products developed for the
office automation, mass storage, communications, and
general embedded markets. Specific applications include disk drives, hand-held terminals and desktop terminals, fax machines, printers, photocopiers, feature
phones, cellular phones, PBXs, multiplexers, modems,
and industrial controls.
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# 19168 Rev: E Amendment/0
Issue Date: February 1997
