General Description
The Innovasic Semiconductor IA186XL and IA188XL microcontrollers have a set of base peripherals beneficial to many embedded applications and include a standard numeric interface, an interrupt control unit, a chip-select unit/Ready Generation Logic, a DRAM refresh control unit, a Power-Save Control unit, DMA and three 16-bit timer/counters. The IA186XL and IA188XL microcontrollers operate at 5.0 volts ± 10%. The following functional description describes the base architecture of the 80C186XL. The 80C186XL is a very high integration 16-bit microprocessor. It combines some of the most common microprocessor system components onto one chip. The 80C186XL is object-code compatible with the 8086/8088 microprocessors and adds ten new instruction types to the 8086/8088 instruction set.

FEATUREs
The primary features of the IA186XL and IA188XL microcontrollers are as follows:
● Form, fit, and function compatible version of the low power Intel 80C186XL/80C188XL
● Operation modes:
   – Enhanced mode
      o DRAM refresh control unit
      o Power-save mode
      o Direct interface to 80C187 (IA186XL only)
   – Compatible mode
      o Pin-for-pin replacement for NMOS 80186/80188 non-numeric applications
● Integrated feature set
   – Static, modular CPU
   – Clock generator
   – Two independent DMA channels
   – Programmable interrupt controller
   – Three 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 ten additional instructions over 8086/8088
● Crystal supports internal 20–25 MHz operation
● Direct addressing capability to 1 MByte memory and 64 Kbyte I/O
● Available in 68-Lead:
   – Plastic Leaded Chip Carrier (PLCC)
● Available in 80-Lead:
   – Plastic Quad Flat Pack (PQFP)
   – Low Profile Quad Flat Pack (LQFP)
● Extended Temperature Range (-40°C to +85°C)