EFM32WG-MCP3850 Silicon Labs

EFM32WG Reference Manual The EFM32 Wonder Gecko MCUs are the worlds most energy- KEY FEATURES friendly microcontrollers. ARM Cortex-M4 at 48 MHz The EFM32WG offers unmatched performance and ultra low power consumption in both Ultra low power operation active and sleep modes. EFM32WG devices consume as little as 0.65 A in Stop mode 0.65 A current in Stop (EM3), with and 225 A/MHz in Run mode. It also features autonomous peripherals, high overall chip CRYOTIMER and RAM retention and analog integration, and the performance of the industry standard 32-bit ARM Cortex- 63 A/MHz in EM1 M4 processor, making it perfect for battery-powered systems and systems with high-per- formance, low-energy requirements. 225 A/MHz in Run mode (EM0) Fast wake-up time of 2 us EFM32WG applications include the following: Hardware cryptography (AES) Industrial and home automation Smart metering Up to 256 kB of Flash and 32 kB of RAM Alarm and security systems Water metering Health and fitness applications Gas metering Core / Memory Clock Management Energy Management Other TM ARM Cortex High Frequency High Frequency Voltage Voltage Hardware AES M4 processor Memory Crystal Oscillator RC Oscillator Regulator Comparator with FPU and Protection Unit MPU Auxiliary High Ultra Low Freq. Brown-Out Power-On Reset RC Oscillator Freq. RC Osc. Detector Flash Program Debug Interface Memory with ETM Low Frequency Low Frequency Backup Domain RAM Memory DMA Controller Crystal Oscillator RC Oscillator 32-bit bus Peripheral Reflex System Serial Interfaces I/O Ports Timers and Triggers Analog Interfaces External Bus Timer/Counter LESENSE USART UART TFT Driver ADC LCD Controller Interface Low Energy Timer Real Time Counter Low Energy External General Operational USB DAC TM UART Purpose I/O Amplifier Interrupts Pulse Counter Watchdog Timer Analog 2 I C Pin Reset Pin Wakeup Back-Up RTC Comparator Lowest power mode with peripheral operational: EM0 - Active EM1 - Sleep EM2 Deep Sleep EM3 - Stop EM4S - Shutoff silabs.com Building a more connected world. Rev. 1.1 Table of Contents 1. Energy Friendly Microcontrollers....................... 24 1.1 Typical Applications............................24 1.2 EFM32WG Development..........................24 2. About This Document ........................... 25 2.1 Conventions ..............................25 2.2 Related Documentation ..........................26 3. System Overview............................. 27 3.1 Introduction...............................27 3.2 Features................................28 3.3 Block Diagram..............................30 3.4 Energy Modes..............................30 3.5 Product Overview ............................32 3.6 Device Revision .............................35 4. System Processor ............................ 36 4.1 Introduction...............................36 4.2 Features................................37 4.3 Functional Description...........................37 4.3.1 Interrupt Operation ..........................38 5. Memory and Bus System.......................... 40 5.1 Introduction...............................41 5.2 Functional Description...........................42 5.2.1 Bit-Banding.............................43 5.2.2 Peripherals.............................45 5.2.3 Bus Matrix.............................47 5.2.4 Access to Low Energy Peripherals (Asynchronous Registers)............48 5.2.5 Flash...............................50 5.2.6 SRAM ..............................51 5.2.7 Device Information (DI) Page.......................52 6. DBG - Debug Interface........................... 54 6.1 Introduction...............................54 6.2 Features................................54 6.3 Functional Description...........................54 6.3.1 Debug Pins.............................55 6.3.2 Embedded Trace Macrocell v3.5 (ETM) ...................55 6.3.3 Debug and EM2/EM3 .........................55 6.3.4 Debug Lock and Device Erase ......................56 6.4 Register Map..............................57 6.5 Register Description............................58 silabs.com Building a more connected world. Rev. 1.1 2