GENERAL DESCRIPTION

The Am186?ES/ESLV and Am188?ES/ESLV microcontrollers are an ideal upgrade for 80C186/188 and 80L186/188 microcontroller designs requiring 80C186/188 and 80L186/188 compatibility, increased performance, serial communications, and a direct bus interface.

DISTINCTIVE CHARACTERISTICS

■ E86? family 80C186-/188- and 80L186-/188- compatible microcontrollers with enhanced bus interface

— Lower system cost with higher performance

— 3.3-V ±0.3-V operation (Am186ESLV and Am188ESLV microcontrollers)

■ High performance

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

— Supports zero-wait-state operation at 25 MHz with 100-ns static memory (Am186ESLV and Am188ESLV microcontrollers) and 40 MHz with 70-ns static memory (Am186ES and Am188ES microcontrollers)

— 1-Mbyte memory address space

— 64-Kbyte I/O space

■ Enhanced features provide improved memory access and remove the requirement for a 2x clock input

— Nonmultiplexed address bus

— Processor operates at the clock input frequency

— On the Am186ES/ESLV microcontroller, 8-bit or 16-bit memory and I/O static bus option

■ Enhanced integrated peripherals provide increased functionality, while reducing system cost

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

— Two full-featured asynchronous serial ports allow full-duplex, 7-bit, 8-bit, or 9-bit data transfers

— Serial port hardware handshaking with CTS, RTS, ENRX, and RTR selectable for each port

— Multidrop 9-bit serial port protocol

— Independent serial port baud rate generators

— DMA to and from the serial ports

— Watchdog timer can generate NMI or reset

— A pulse-width demodulation option

— A data strobe, true asynchronous bus interface option included for DEN

— Pseudo static RAM (PSRAM) controller includes auto refresh capability

— Reset configuration register

■ Familiar 80C186/80L186 peripherals

— Two independent DMA channels

— Programmable interrupt controller with up to eight external and eight internal interrupts

— Three programmable 16-bit timers

— Programmable memory and peripheral chip-select logic

— Programmable wait state generator

— Power-save clock divider

■ Software-compatible with the 80C186/80L186 and 80C188/80L188 microcontrollers with widely available native development tools, applications, and system software

■ A compatible evolution of the Am186?EM and Am188?EM microcontrollers

■ Available in the following packages:

— 100-pin, thin quad flat pack (TQFP)

— 100-pin, plastic quad flat pack (PQFP)