| GENERAL DESCRIPTION The Am186TMER and Am188TMER microcontrollers are par t of the AMD E86™ family of embedded microcontrollers and microprocessors based on the x86 architecture. The Am186ER and Am188ER microcontrollers are the ideal upgrade for designs requiring 80C186/80C188 microcontroller compatibility, increased performance, serial communications, a direct bus interface, and integrated memory. DISTINCTIVE CHARACTERISTICS ■ E86TM family 80C186- and 80C188-compatible microcontrollers with enhanced bus interface — Lower system cost with high performance — 3.3-V ± 0.3-V operation with 5-V tolerant I/O ■ Memory integration — 32 Kbyte of internal SRAM — Internal SRAM provides same performance as zero-wait-state external memory ■ High performance — 25-, 33-, 40- and 50-MHz operating frequencies — Supports zero-wait-state operation at 50 MHz with 55-ns external memory — 1-Mbyte memory address space — 64-Kbyte I/O space ■ Enhanced features provide faster access to memory and various clock input modes — Nonmultiplexed address bus provides glueless interface to external RAM and ROM — Phase-locked loop (PLL) enables processor to operate at up to four times clock input frequency ■ Enhanced integrated peripherals — Thirty-two programmable I/O (PIO) pins — Asynchronous serial port allows full-duplex, 7-bit or 8-bit data transfers — DMA to and from asynchronous serial port — Synchronous serial interface allows half-duplex, bidirectional data transfer to and from ASICs — Reset configuration register — Additional external interrupts — Hardware watchdog timer can generate NMI or system reset — Pseudo static RAM (PSRAM) controller includes auto refresh capability ■ Familiar 80C186 peripherals with enhanced functionality — Two independent DMA channels — Programmable interrupt controller with six external interrupts — Three programmable 16-bit timers — Programmable memory and peripheral chip-select logic — Programmable wait state generator — Power-save clock mode ■ Software-compatible with the 80C186 and 80C188 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) |
