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)