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EFM32G222F128-QFP48 Datasheet(PDF) 3 Page - Silicon Laboratories |
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EFM32G222F128-QFP48 Datasheet(HTML) 3 Page - Silicon Laboratories |
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3 / 68 page  ...the world's most energy friendly microcontrollers 2015-05-22 - EFM32G222FXX - d0033_Rev1.90 3 www.silabs.com 2 System Summary 2.1 System 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 EFM32G microcontroller is well suited for any battery operated application as well as other systems requiring high performance and low-energy con- sumption. This section gives a short introduction to each of the modules in general terms and also shows a summary of the configuration for the EFM32G222 devices. For a complete feature set and in-depth information on the modules, the reader is referred to the EFM32G Reference Manual. A block diagram of the EFM32G222 is shown in Figure 2.1 (p. 3) . Figure 2.1. Block Diagram Clock Managem ent Energy Managem ent Serial Interfaces I/O Ports Core and Memory Timers and Triggers Analog Interfaces Security 32-bit bus Peripheral Reflex Syst em ARM Cortex™- M3 processor Flash Memory [KB] Peripheral Reflex Sys tem Timer/ Counter Low Energy Timer™ Pulse Counter Real Time Counter Voltage Regulator Watchdog Timer RAM Memory [KB] Voltage Comparator Power-on Reset Brown-out Detector Analog Comparator General Purpose I/ O Low Energy UART™ Memory Protection Unit ADC DAC DMA Controller Debug Interface Ex ternal Interrupts Pin Reset USA RT I2C AES 32/ 64/ 128 8/ 16/ 16 2x 2x 37 pins 3x G222F32/ 64/ 128 3x Aux High Freq RC Oscillat or High Frequency RC Oscillator High Frequency Crystal Oscillator Lo w Frequency Crystal Oscillator Lo w Frequency RC Oscillator Watchdog Oscillator 2.1.1 ARM Cortex-M3 Core The ARM Cortex-M3 includes a 32-bit RISC processor which can achieve as much as 1.25 Dhrystone MIPS/MHz. A Memory Protection Unit with support for up to 8 memory segments is included, as well as a Wake-up Interrupt Controller handling interrupts triggered while the CPU is asleep. The EFM32 implementation of the Cortex-M3 is described in detail in EFM32G Cortex-M3 Reference Manual. 2.1.2 Debug Interface (DBG) This device includes hardware debug support through a 2-pin serial-wire debug interface . In addition there is also a 1-wire Serial Wire Viewer pin which can be used to output profiling information, data trace and software-generated messages. 2.1.3 Memory System Controller (MSC) The Memory System Controller (MSC) is the program memory unit of the EFM32G microcontroller. The flash memory is readable and writable from both the Cortex-M3 and DMA. The flash memory is divided |
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