INTRODUCTION
The following Functional Description describes the base architecture of the M80C186XL. The M80C186XL is a very high integration 16-bit microprocessor. It combines 15–20 of the most common microprocessor system components onto one chip. The M80C186XL is object code compatible with the 8086/8088 microprocessors and adds 10 new instruction types to the 8086/8088 instruction set.

■ Low Power, Full Static Version of M80C186
■ Operation Modes:
    — Enhanced Mode
        — DRAM Refresh Control Unit
        — Power-Save Mode
        — Direct Interface to 80C187
    — Compatible Mode
        — NMOS 80186 Pin-for-Pin Replacement for Non-Numerics Applications
■ Integrated Feature Set
    — Static, Modular CPU
    — Clock Generator
    — 2 Independent DMA Channels
    — Programmable Interrupt Controller
    — 3 Programmable 16-Bit Timers
    — Dynamic RAM Refresh Control Unit
    — Programmable Memory and Peripheral Chip Select Logic
    — Programmable Wait State Generator
    — Local Bus Controller
    — Power-Save Mode
    — System-Level Testing Support (High Impedance Test Mode)
■ Completely Object Code Compatible with Existing 8086/8088 Software and Has 10 Additional Instructions over 8086/8088
■ Speed Versions Available
    — 20 MHz (M80C186XL20)
    — 16 MHz (M80C186XL16)
    — 12.5 MHz (M80C186XL12)
    — 10 MHz (M80C186XL)
■ Direct Addressing Capability to 1 MByte Memory and 64 Kbyte I/O
■ Complete System Development Support
    — All 8086 and 80C186 Software Development Tools Can Be Used for M80C186XL System Development
        — ASM 86 Assembler, PL/M-86, Pascal-86, Fortran-86, iC-86 and System Utilities
        — In-Circuit-Emulator (ICETM-186)
■ Available in 68-Pin:
    — Ceramic Pin Grid Array (PGA)
■ Military Temperature Range:
    — -55°C to +125°C (TC)