GENERAL DESCRIPTION
The Am186^TM EM/EMLV and Am188^TM 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
E86^TM 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 (Am186^TM EMLV and Am188^TM EMLV microcontrollers) and 40 MHz with 70-ns static memory (Am186^TM EM and Am188^TM 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)