The Busy Bee family of EFM8 Microcontrollers (MCUs) includes general purpose MCUs that operate at up to 50 MHz. These MCUs offer high-value by integrating advanced analog and communication peripherals into small packages, making them ideal for space constrained applications.


  • Pipelined 8-bit C8051 core with up to 50 MHz maximum operating frequency
  • Up to 22 multifunction, 5 V tolerant I/O pins
  • One 12-bit Analog to Digital converter (ADC) with up to 20 channels
  • Two low-current analog comparators
  • Integrated temperature sensor
  • 3-channel enhanced PWM / PCA
  • Up to five 16-bit timers
  • UART, SPI and SMBus/I2C
  • Priority crossbar for flexible pin mapping

Busy Bee Resources

Silicon Labs Busy Bee EFM8 Datasheet
Silicon Labs Busy Bee EFM8 Datasheet

Busy Bee Products

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