Introduction
The SAB 80C166W/83C166W is a representative of the Siemens SAB 80C166 family of full featured single-chip CMOS microcontrollers. It combines high CPU performance (up to 10 million instructions per second) with high peripheral functionality and enhanced IO-capabilities. These devices derive the CPU clock signal (operating clock) directly from the on-chip oscillator without using a prescaler. This reduces the device’s EME.

SAB 80C166W/83C166W / 83C166W 16-Bit Microcontroller
● High Performance 16-bit CPU with 4-Stage Pipeline
● 100 ns Instruction Cycle Time at 20 MHz CPU Clock
● 500 ns Multiplication (16 × 16 bits), 1 µs Division (32 / 16 bit)
● Enhanced Boolean Bit Manipulation Facilities
● Register-Based Design with Multiple Variable Register Banks
● Single-Cycle Context Switching Support
● Up to 256 KBytes Linear Address Space for Code and Data
● 1 KByte On-Chip RAM
● 32 KBytes On-Chip ROM (SAB 83C166W only)
● Programmable External Bus Characteristics for Different Address Ranges
● 8-Bit or 16-Bit External Data Bus
● Multiplexed or Demultiplexed External Address/Data Buses
● Hold and Hold-Acknowledge Bus Arbitration Support
● 512 Bytes On-Chip Special Function Register Area
● Idle and Power Down Modes
● 8-Channel Interrupt-Driven Single-Cycle Data Transfer Facilities via Peripheral Event Controller (PEC)
● 16-Priority-Level Interrupt System
● 10-Channel 10-bit A/D Converter with 9.7 µs Conversion Time
● 16-Channel Capture/Compare Unit
● Two Multi-Functional General Purpose Timer Units with 5 Timers
● Two Serial Channels (USARTs)
● Programmable Watchdog Timer
● Up to 76 General Purpose I/O Lines
● Direct clock input without prescaler
● Supported by a Wealth of Development Tools like C-Compilers, Macro-Assembler Packages, Emulators, Evaluation Boards, HLL-Debuggers, Simulators, Logic Analyzer Disassemblers, Programming Boards
● On-Chip Bootstrap Loader
● 100-Pin Plastic MQFP Package (EIAJ)