EFM32 Leopard Gecko Family

EFM32LG Data Sheet

The EFM32 Leopard Gecko MCUs are the world’s most energy-

friendly microcontrollers.

The EFM32LG offers unmatched performance and ultra-low power consumption in both

active and sleep modes. EFM32LG devices consume as little as 0.65 μA in Stop mode

and 211 μA/MHz in Run mode. It also features autonomous peripherals, high overall chip

and analog integration, and the performance of the industry standard 32-bit ARM Cortex-

M3 processor, making it perfect for battery-powered systems and systems with high-per-

formance, low-energy requirements.

EFM32LG applications include the following:

KEY FEATURES

• ARM Cortex-M3 at 48 MHz

• Ultra-low power operation

• 0.65 μA current in Stop (EM3), with

brown-out detection and RAM retention

• 63 μA/MHz in EM1

• 211 μA/MHz in Run mode (EM0)

• Fast wake-up time of 2 µs

• Hardware cryptography (AES)

• Up to 256 kB of flash and 32 kB of RAM

• Energy, gas, water and smart metering

• Health and fitness applications

• Smart accessories

• Alarm and security systems

• Industrial and home automation

32-bit bus

Lowest power mode with peripheral operational:

EM2 – Deep Sleep

EM1 - Sleep EM4 - Shutoff

EM0 - Active

EM3 - Stop

Core / Memory

Flash Program

Memory

RAM Memory

ARM Cortex

M3 processor

Debug w/ ETM

DMA Controller

Memory

Protection Unit

Security

Hardware AES

Energy Management

Power-on

Reset

Voltage

Regulator

Voltage

Comparator

Brown-out

Detector

Clock Management

High Frequency

RC Oscillator

Low Freq.

RC Oscillator

Low Frequency

Crystal Oscillator

Ultra Low Freq.

RC Oscillator

Auxiliary High

Freq. RC Osc.

High Frequency

Crystal Oscillator

Analog Interfaces

LCD ControllerADC

DAC

Operational

Amplifier

Peripheral Reflex System

Serial Interfaces

UART

I/O Ports Timers and Triggers

Timer/Counter

Low Energy Timer

Real Time Counter

External

Interrupts

General

Purpose I/O

External Bus

Interface

TFT Driver

LESENSE

Pulse Counter

USART

Low Energy

UART

Back-up Power

Domain

USB

Pin Reset Pin Wakeup

Back-up RTC

Watchdog Timer

Analog

Comparator

1. Feature List

• ARM Cortex-M3 CPU platform

• High Performance 32-bit processor @ up to 48 MHz

• Memory Protection Unit

• Wake-up Interrupt Controller

• SysTick System Timer

• Flexible Energy Management System

• 20 nA @ 3 V Shutoff Mode

• 0.4 µA @ 3 V Shutoff Mode with RTC

• 0.65 µA @ 3 V Stop Mode, including Power-on Reset, Brown-out Detector, RAM and CPU retention

• 0.95 µA @ 3 V Deep Sleep Mode, including RTC with 32.768 kHz oscillator, Power-on Reset, Brown-out Detector, RAM and

CPU retention

• 63 µA/MHz @ 3 V Sleep Mode

• 211 µA/MHz @ 3 V Run Mode, with code executed from flash

• 256/128/64 kB flash

• 32 kB RAM

• Up to 93 General Purpose I/O pins

• Configurable push-pull, open-drain, pull-up/down, input filter, drive strength

• Configurable peripheral I/O locations

• 16 asynchronous external interrupts

• Output state retention and wake-up from Shutoff Mode

• 12 Channel DMA Controller

• 12 Channel Peripheral Reflex System (PRS) for autonomous inter-peripheral signaling

• Hardware AES with 128/256-bit keys in 54/75 cycles

• Timers/Counters

• 4× 16-bit Timer/Counter

• 4×3 Compare/Capture/PWM channels

• Dead-Time Insertion on TIMER0

• 16-bit Low Energy Timer

• 1× 24-bit Real-Time Counter and 1× 32-bit Real-Time Counter

• 3× 16/8-bit Pulse Counter

• Watchdog Timer with dedicated RC oscillator @ 50 nA

• Integrated LCD Controller for up to 8×36 segments

• Voltage boost, adjustable contrast, and autonomous animation

• Backup Power Domain

• RTC and retention registers in a separate power domain, available in all energy modes

• Operation from backup battery when main power drains out

• External Bus Interface for up to 4x256 MB of external memory mapped space

• TFT Controller with Direct Drive

• Communication interfaces

• Up to 3× Universal Synchronous/Asynchronous Receiver/Transmitter

• UART/SPI/SmartCard (ISO 7816)/IrDA/I2S

• 2× Universal Asynchronous Receiver/Transmitter

• 2× Low Energy UART

• Autonomous operation with DMA in Deep Sleep Mode

•

2× I

C Interface with SMBus support

• Address recognition in Stop Mode

• Universal Serial Bus (USB) with Host & OTG support

• Fully USB 2.0 compliant

• On-chip PHY and embedded 5 to 3.3 V regulator

EFM32LG Data Sheet

Feature List

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