User manual

...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 5
www.energymicro.com
3 System Overview
3.1 Introduction
The EFM32 MCUs are the world’s most energy friendly microcontrollers. With a unique combination of
the powerful 32-bit ARM Cortex-M3, innovative low energy techniques, short wake-up time from energy
saving modes, and a wide selection of peripherals, the EFM32GG microcontroller is well suited for
any battery operated application as well as other systems requiring high performance and low-energy
consumption, see Figure 3.1 (p. 7) .
3.2 Features
• ARM Cortex-M3 CPU platform
• High Performance 32-bit processor @ up to 48 MHz
• Memory Protection Unit
• Wake-up Interrupt Controller
• Flexible Energy Management System
• 20 nA @ 3 V Shutoff Mode
• 0.4µA @ 3 V Shutoff Mode with RTC
• 0.9 µA @ 3 V Stop Mode, including Power-on Reset, Brown-out Detector, RAM and CPU
retention
• 1.2 µA @ 3 V Deep Sleep Mode, including Real Time Clock with 32.768 kHz oscillator,
Power-on Reset, Brown-out Detector, RAM and CPU retention
• 50 µA/MHz @ 3 V Sleep Mode
• 200 µA/MHz @ 3 V Run Mode, with code executed from flash
• 1024/512 KB Flash
• Read-while-write support for 1024/512 KB parts
• 128 KB RAM
• Up to 90 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 wakeup from Shutoff Mode
• 12 Channel DMA Controller
• Alternate/primary descriptors with scatter-gather/ping-pong operation
• 12 Channel Peripheral Reflex System for autonomous inter-peripheral signaling
• External Bus Interface for up to 256 MB of external memory mapped space
• TFT Controller supporting Direct Drive
• Universal Serial Bus (USB) with Host and OTG support
• Fully USB 2.0 compliant
• On-chip PHY and embedded 5V to 3.3V regulator
• Integrated LCD Controller for up to 8×36 segments
• Voltage boost, adjustable contrast adjustment and autonomous animation feature
• Hardware AES with 128/256-bit keys in 54/75 cycles
• Communication interfaces
• 3× Universal Synchronous/Asynchronous Receiver/Transmitter
• UART/SPI/SmartCard (ISO 7816)/IrDA (USART0)/I2S (USART1+USART2)
• Triple buffered full/half-duplex operation
• 4-16 data bits
• 2× Universal Asynchronous Receiver/Transmitter
• Triple buffered full/half-duplex operation
• 8-9 data bits