Introduction
The C164CI derivatives of the Infineon C166 Family of full featured single-chip CMOS microcontrollers are especially suited for cost sensitive applications. They combine high CPU performance (up to 12.5 million instructions per second) with high peripheral functionality and enhanced IO-capabilities. They also provide clock generation via PLL and various on-chip memory modules such as program ROM or OTP, internal RAM, and extension RAM.

16-Bit Single-Chip Microcontroller C164CI C166 Family
C164CI/SI, C164CL/SL
• High Performance 16-bit CPU with 4-Stage Pipeline
   – 80 ns Instruction Cycle Time at 25 MHz CPU Clock
   – 400 ns Multiplication (16 × 16 bit), 800 ns 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
   – 16 MBytes Total Linear Address Space for Code and Data
   – 1024 Bytes On-Chip Special Function Register Area
• 16-Priority-Level Interrupt System with 32 Sources, Sample-Rate down to 40 ns
• 8-Channel Interrupt-Driven Single-Cycle Data Transfer Facilities via Peripheral Event Controller (PEC)
• Clock Generation via on-chip PLL (factors 1:1.5/2/2.5/3/4/5), via prescaler or via direct clock input
• On-Chip Memory Modules
   – 2 KBytes On-Chip Internal RAM (IRAM)
   – 2 KBytes On-Chip Extension RAM (XRAM)
   – up to 64 KBytes On-Chip Program Mask ROM or OTP Memory
• On-Chip Peripheral Modules
   – 8-Channel 10-bit A/D Converter with Programmable Conversion Time down to 7.8 µs
   – 8-Channel General Purpose Capture/Compare Unit (CAPCOM2)
   – Capture/Compare Unit for flexible PWM Signal Generation (CAPCOM6) (3/6 Capture/Compare Channels and 1 Compare Channel)
   – Multi-Functional General Purpose Timer Unit with 3 Timers
   – Two Serial Channels (Synchronous/Asynchronous and High-Speed-Synchronous)
   – On-Chip CAN Interface (Rev. 2.0B active) with 15 Message Objects (Full CAN/Basic CAN)
– On-Chip Real Time Clock
• Up to 4 MBytes External Address Space for Code and Data
   – Programmable External Bus Characteristics for Different Address Ranges
   – Multiplexed or Demultiplexed External Address/Data Buses with 8-Bit or 16-Bit Data Bus Width
   – Four Optional Programmable Chip-Select Signals
• Idle, Sleep, and Power Down Modes with Flexible Power Management
• Programmable Watchdog Timer and Oscillator Watchdog
• Up to 59 General Purpose I/O Lines, partly with Selectable Input Thresholds and Hysteresis
• 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 Bootstrap Loader
• 80-Pin MQFP Package, 0.65 mm pitch