GENERAL DESCRIPTION

The Am186TM EM/EMLV and Am188TM EM/EMLV microcontrollers are the ideal upgrade for 80C186/188 and 80L186/188 microcontroller designs requiring 80C186/188 and 80L186/188 microcontroller compatibility, in creased 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.

DISTINCTIVE CHARACTERISTICS

E86TM family 80C186- and 80C188-compatible microcontrollers with enhanced bus interface

— Lower system cost with higher performance

— 3.3-V ±.3-V operation (Am186EMLV and Am188EMLV microcontrollers)

High performance

— 20-, 25-, 33-, and 40-MHz operating frequencies

— Supports zero-wait-state operation at 25 MHz with 110-ns static memory (Am186TM EMLV and Am188TM EMLV microcontrollers) and 40 MHz with 70-ns static memory (Am186TM EM and Am188TM EM microcontrollers)

— 1-Mbyte memory address space

— 64-Kbyte I/O space

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

New integrated peripherals provide increased functionality while reducing system cost

— Thirty-two programmable I/O (PIO) pins

— 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)