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ColdFire Microcontroller, Modular Architecture, Coldfire Family MC683xx Series Microcontrollers

The MC68331CEH20 is a 32-bit Modular Microcontroller that combines high-performance data manipulation capabilities with powerful peripheral subsystems. MCU is built up from standard modules that interface through a common inter-module bus. Standardization facilitates the rapid development of devices tailored for specific applications. The MCU incorporates a 32-bit CPU, a system integration module, a general-purpose timer, and a queued serial module. The MCU can either synthesize an internal clock signal from an external reference or use an external clock input directly. Operation with a 32.768kHz reference frequency is standard. The maximum system clock speed is 20.97MHz. Because MCU operation is fully static, register and memory contents are not affected by a loss of the clock. High-density complementary metal-oxide-semiconductor architecture makes the basic power consumption of the MCU low. The CPU32 instruction set includes a low-power stop command that efficiently implements this capability.

  • Modular architecture
  • Central processing unit (CPU32)
  • Upward object code compatible
  • Virtual memory implementation
  • Loop mode of instruction execution
  • Table lookup and interpolate instruction
  • Trace on change of flow
  • Hardware breakpoint signal, background mode
  • Fully static operation
  • External bus support
  • Programmable chip-select outputs
  • System protection logic
  • Watchdog timer, clock monitor, and bus monitor
  • Test/debug sub module for factory/user test and development
  • Queued serial peripheral interface - 80-byte RAM, up to 16 automatic transfers
  • Dual function I/O ports
  • General-purpose timer
  • Three input capture channels
  • Four output compare channels
  • 2 Pulse-width modulation outputs

Automation & Process Control, Industrial

Technical DocMC68331CEH20  Datasheet

Additional information

Manufacturer Part No.





213 available for 4 – 6 business days delivery



RoHS Compliant

Product Range

Coldfire Family MC683xx Series Microcontrollers

Pack Quantity




No. of Bits

Program Memory Size

RAM Memory Size

No. of Pins

MCU Case Style

No. of I/O's

Embedded Interface Type

Supply Voltage Min

Supply Voltage Max

MCU Family


RoHs Phthalates Compliant


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