Energivenlige USB microcontrollere

Silicon Labs er nu klar med den såkaldte 'Happy Gecko' famile, som firmaet betegner som industriens hidtil mest energivenlige familie af USB microcontrollere (in english).

Based on the ARM Cortex-M0+ core and low-energy peripherals, the Happy Gecko family simplifies USB connectivity for a wide range of IoT applications including smart metering, home and building automation, alarm and security systems, smart accessories and wearable devices.

A leading supplier of USB bridge chips and smart interface ICs, Silicon Labs developed the Happy Gecko family to address the rising demand for cost-effective, low-power USB connectivity solutions.

With more than three billion USB-enabled devices shipping each year, USB is the fastest growing interface for consumer applications and is also gaining significant traction in industrial automation. In today’s IoT world, developers have discovered that adding USB interfaces to portable, battery-powered connected devices can double the application current consumption. Silicon Labs’ Happy Gecko MCUs provide an ideal energy-friendly USB connectivity solution for these power-sensitive IoT applications.

Happy Gecko USB MCUs feature an advanced energy management system with five energy modes enabling applications to remain in an energy-optimal state by spending as little time as possible in active mode. In deep-sleep mode, Happy Gecko MCUs have an industry-leading 0.9 μA standby current consumption (with a 32.768 kHz RTC, RAM/CPU state retention, brown-out detector and power-on-reset circuitry active). Active-mode power consumption drops down to 130 µA/MHz at 24 MHz with real-world code (prime number algorithm). The USB MCUs further reduce power consumption with a 2-microsecond wakeup time from standby mode.

Like all EFM32 MCUs, the Happy Gecko family includes the Peripheral Reflex System (PRS) feature, which greatly enhances overall energy efficiency. The six-channel PRS monitors complex system-level events and allows different MCU peripherals to communicate autonomously with each other without CPU intervention. The PRS watches for specific events to occur before waking the CPU, thereby keeping the Cortex-M0+ core in an energy-saving standby mode as long as possible, reducing system power consumption and extending battery life.

Happy Gecko MCUs feature many of the same low-energy precision analog peripherals included in other popular EFM32 devices. These low-energy peripherals include an analog comparator, supply voltage comparator, on-chip temperature sensor, programmable current digital-to-analog converter (IDAC), and a 12-bit analog-to-digital converter (ADC) with 350 μA current consumption at a 1 MHz sample rate. On-chip AES encryption enables the secure deployment of wireless connectivity for IoT applications such as smart meters and wireless sensor networks.

The Happy Gecko family’s single-die integration enables developers to reduce component count and bill-of-materials (BOM) cost. While typical USB connectivity alternatives require external components such as crystals and regulators, the highly integrated Happy Gecko MCUs eliminate nearly all of these discretes with a crystal-less architecture featuring a full-speed USB PHY, an on-chip regulator and resistors. Happy Gecko MCUs are available in a choice of space-saving QFN, QFP and chip-scale package (CSP) options small enough for use in USB connectors and thin-form-factor wearable designs.

- Happy Gecko MCUs bring the benefits of Silicon Labs’ energy-friendly EFM32 architecture to developers seeking an economical, plug-and-play solution for adding USB connectivity to their battery-powered IoT applications, says Daniel Cooley, vice president and general manager of Silicon Labs’ MCU and wireless products.

- The combination of Happy Gecko USB MCUs and our Simplicity Studio development environment enables system designers to connect their 32-bit applications to virtually anything with the lowest energy consumption and BOM cost.

http://www.silabs.com/Happy-Gecko