Introduction
The C161 is a new derivative of the Siemens SAB 80C166 family of single-chip CMOS microcontrollers. It combines high CPU performance (up to 8 million instructions per second) with high peripheral functionality and enhanced IO-capabilities. The C161 derivatives are especially suited for cost sensitive applications.

● High Performance 16-bit CPU with 4-Stage Pipeline
● 125 ns Instruction Cycle Time at 16-MHz CPU Clock
● 625 ns Multiplication (16 × 16 bits), 1,25 µs Division (32 / 16 bit)
● Enhanced Boolean Bit Manipulation Facilities
● Additional Instructions to Support HLL and Operating Systems
● Register-Based Design with Multiple Variable Register Banks
● Single-Cycle Context Switching Support
● Clock Generation via Prescaler or via Direct Clock Input
● Up to 4 MBytes Linear Address Space for Code and Data
● 1 KByte On-Chip RAM on C161V and C161K, 2 KBytes On-Chip RAM on C161O
● Programmable External Bus Characteristics for Different Address Ranges
● 8-Bit or 16-Bit External Data Bus
● Multiplexed or Demultiplexed External Address/Data Buses (MUX Bus only on C161V)
● Programmable Chip-Select Signals (not on C161V)
● 1024 Bytes On-Chip Special Function Register Area
● Idle and Power Down Modes (not on C161V)
● 8-Channel Interrupt-Driven Single-Cycle Data Transfer Facilities via Peripheral Event
   Controller (PEC)
● 16-Priority-Level Interrupt System with 14 Sources on C161V, 20 Sources on C161K, C161O
● Multi-Functional General Purpose Timer Unit(s)
● Synchronous/Asynchronous Serial Channel
● High-Speed-Synchronous Serial Channel
● Programmable Watchdog Timer
● Up to 63 General Purpose I/O Lines
● Supported by a Large Range of Development Tools like C-Compilers, Macro-Assembler
   Packages, Emulators, Evaluation Boards, HLL-Debuggers, Simulators, Logic Analyzer
   Disassemblers, Programming Boards
● Ambient Temperature Range 0 to 70 ˚C
● 80-Pin MQFP Package (0.65 mm pitch)