Features
  • 25 MHz ARM Cortex-M0+ CPU
  • Up to 64 kB flash
  • Up to 8 kB RAM
  • Up to 35 GPIOs
  • Low Energy USB
    • Full speed (12 MHz) USB 2.0 Device
  • Ultra low power precision and analog peripherals
    • 12-bit 1 Msps ADC
  • Autonomous sensor monitoring in deep sleep
  • Supports wide range of sensors, including LC sensors and capacitive buttons
  • Flexible energy management system with 5 different energy modes
    • 20 nA shutoff mode (0.5 µA with RTC)
    • 0.6 µA stop mode, including power-on-reset, brown-out detector, RAM and CPU retention
    • 0.9 µA deep sleep mode, including RTC with 32.768 kHz oscillator, power-on-reset, brown-out detector, RAM and CPU retention
    • 53 µA/MHz sleep mode
    • 131 µA/MHz run mode with code executed from flash
  • Cryptography: AES-128
  • Debug interface
  • 1.98–3.8 V supply voltage
  • Temperature range: –40 to +85 °C
  • Packages:
    • 48-pin QFP (7 mm x 7 mm)
    • 32-pin QFN (6 mm x 6 mm)
    • 24-pin QFN (5 mm x 5 mm)
    • 36-pin CSP (3 mm x 3 mm)
The Past, Present and Future of USB
Learn how to balance your power budget to achieve all of your goals using Silicon Labs’ low-power USB MCU solutions.
​​

Getting Started with EFM32™ Happy Gecko

Happy Gecko Starter Kit

The easiest way to begin development with the SLSTK3400A provides an excellent tool to get familiar with the EFM32™ Happy Gecko 32-bit microcontrollers (MCUs), the industry’s most energy-friendly MCU based on the ARM® Cortex®-M0+ processor.

Add to Cart

More Development Tools


Happy Gecko Product Matrix


Common Specifications
MCU Core: ARM Cortex-M0+
MHz: 25
Timers (16-bit): 3
Internal Osc.: ±2%
Temp Sensor: Yes
Comparators: 1
Debug Interface: MTB; SW
Cap Sense: Yes
I2C: 1
I2S: 1
SPI: 2
USART: 2
Devices
Part NumberData SheetDev KitMHzFlashRAM (kB)Dig I/O Pins5 Volt TolerantADC 1DACUSBCap SenseLCDTemp SensorTimers (16-bit)AES-128AES-256ECCSHA-1SHA-2RSA-2048UARTUSARTSPII2CI2SEMIFRTCComparatorsVdd (min)Vdd (max)Package TypePackage SizeInternal Osc.Debug InterfaceOtherCryptographyOrder Part NumberShort Description

SLSTK3400A
2532 kB417No0YesNoYes3NoNoNoNoNoNo322110Yes11.98 V3.8 VQFN245x5 mm±2%MTB; SWLow Power; RTCEFM32HG108F32G-A-QFN24

SLSTK3400A
2564 kB817No0YesNoYes3NoNoNoNoNoNo322110Yes11.98 V3.8 VQFN245x5 mm±2%MTB; SWLow Power; RTCEFM32HG108F64G-A-QFN24

SLSTK3400A
2532 kB417No12-bit, 2-ch., 1 Msps0YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFN245x5 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG110F32G-A-QFN24

SLSTK3400A
2564 kB817No12-bit, 2-ch., 1 Msps0YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFN245x5 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG110F64G-A-QFN24

SLSTK3400A
2532 kB424No12-bit, 4-ch., 1 Msps0YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFN326x6 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG210F32G-A-QFN32

SLSTK3400A
2564 kB824No12-bit, 4-ch., 1 Msps0YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFN326x6 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG210F64G-A-QFN32

SLSTK3400A
2532 kB437No12-bit, 4-ch., 1 Msps0YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFP487x7 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG222F32G-A-QFP48

SLSTK3400A
2564 kB837No12-bit, 4-ch., 1 Msps0YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFP487x7 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG222F64G-A-QFP48

SLSTK3400A
2532 kB815No1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFN245x5 mm±2%MTB; SWLow Power; RTCEFM32HG308F32G-A-QFN24

SLSTK3400A
2564 kB815No1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFN245x5 mm±2%MTB; SWLow Power; RTCEFM32HG308F64G-A-QFN24

SLSTK3400A
2532 kB815No12-bit, 2-ch., 1 Msps1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFN245x5 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG309F32G-A-QFN24

SLSTK3400A
2564 kB815No12-bit, 2-ch., 1 Msps1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFN245x5 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG309F64G-A-QFN24

SLSTK3400A
2532 kB822No12-bit, 4-ch., 1 Msps1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFN326x6 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG310F32G-A-QFN32

SLSTK3400A
2564 kB822No12-bit, 4-ch., 1 Msps1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFN326x6 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG310F64G-A-QFN32

SLSTK3400A
2532 kB835No12-bit, 4-ch., 1 Msps1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFP487x7 mm±2%MTB; SWLow Power; RTCEFM32HG321F32G-A-QFP48

SLSTK3400A
2564 kB835No12-bit, 4-ch., 1 Msps1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFP487x7 mm±2%MTB; SWLow Power; RTCEFM32HG321F64G-A-QFP48

SLSTK3400A
2532 kB835No12-bit, 4-ch., 1 Msps1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFP487x7 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG322F32G-A-QFP48

SLSTK3400A
2564 kB835No12-bit, 4-ch., 1 Msps1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VQFP487x7 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG322F64G-A-QFP48

SLSTK3400A
2532 kB822No12-bit, 4-ch., 1 Msps1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VCSP363x3 mm±2%MTB; SWAES; Low Power; RTCAES-256EFM32HG350F64G-A-CSP36

SLSTK3400A
2564 kB822No12-bit, 4-ch., 1 Msps1YesNoYes3YesNoNoNoNoNo322110Yes11.98 V3.8 VCSP363x3 mm±2%MTB; SWAES; Low Power; RTCAES-128EFM32HG350F64G-A-CSP36