Introduction
The C161RI is a new derivative of the Siemens C166 Family of 16-bit 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 C161RI derivative is especially suited for cost sensitive applications.

C166-Family of High-Performance CMOS 16-Bit Microcontrollers

Preliminary
C161RI 16-Bit Microcontroller

● 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 8 MBytes Linear Address Space for Code and Data
● 1 KByte On-Chip Internal RAM (IRAM)
● 2 KBytes On-Chip Extension RAM (XRAM)
● Programmable External Bus Characteristics for Different Address Ranges
● 8-Bit or 16-Bit External Data Bus
● Multiplexed or Demultiplexed External Address/Data Bus
● 5 Programmable Chip-Select Signals
● 1024 Bytes On-Chip Special Function Register Area
● 8-Channel Interrupt-Driven Single-Cycle Data Transfer Facilities via Peripheral Event
   Controller (PEC)
● 16-Priority-Level Interrupt System, 11 External Interrupts
● 4-Channel 8-bit A/D Converter, conversion time down to 7.625 µs
● 2 Multi-Functional General Purpose Timer Units with five 16-bit Timers
● Synchronous/Asynchronous Serial Channel (USART)
● High-Speed Synchronous Serial Channel
● I2C Bus Interface (10-bit Addressing, 400 KHz) with 2 Channels (multiplexed)
● Up to 76 General Purpose I/O Lines
● Programmable Watchdog Timer
● On-Chip Real Time Clock
● Idle and Power Down Modes with Flexible Power Management
● Ambient temperature range – 40 to 85 °C
● 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
● On-Chip Bootstraploader
● 100-Pin MQFP / TQFP Package