| 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) |
