Three starter kits for evaluation of the low-power 8-bit EFM8 Busy Bee microcontrollers. EFM8 Busy Bee microcontrollers offer low power consumption by combining innovative low-energy techniques with short wakeup times.

SLSTK2020A: 25MHz EFM8BB10F8G-A 8051-core microcontroller, 8KB Flash memory, 512B RAM (RS 865-2378)
SLSTK2021A: 50MHz EFM8BB22F16G-A 8051-core microcontroller, 16KB Flash memory, 2304B RAM (RS 865-2371)
SLSTK2022A: 50MHz EFM8BB31F64G-A 8051-core microcontroller, 64KB Flash memory, 4352B RAM (RS 914-0107)
Integrated debugger
Advanced Energy Monitor (AEM)
128 x 128 pixel memory LCD display, reflective monochrome
2 x user pushbuttons
Reset pushbutton
Thumb analogue joystick
Access to GPIO via breakout pads
User tri-colour LED
Powered from USB connector or CR2032 coin cell, selected by slide-switch
CR2032 coin cell holder
miniUSB power connector
20-pin Expansion header & Debug connectors

CR2032 battery, getting started card and USB cable.

The EFM8 8-bit microcontroller family has an unparalleled combination of features and capabilities including a high-speed pipelined 8051 core, ultra-low power, precision analogue and enhanced communication peripherals, integrated oscillators, small-footprint packages, and a crossbar architecture that enables flexible digital and analogue multiplexing to simplify PCB design and I/O signal routing. These next-generation 8-bit devices are aimed at the engineer developing products for the Internet-of-Things (IoT) which will be very small, perform complex processing and run off tiny batteries.