November 23, 2016—Silicon Labs (also known as “core technologyâ€) announced two series of automotive-grade EFM8 microcontrollers (MCUs) designed to meet a wide range of in-vehicle touch interfaces and body electronics motor control application. The AEC-Q100-certified, ultra-low-power EFM8SB1 Sleepy Bee family offers advanced on-chip capacitive touch technology that makes it easy to replace physical buttons with touch controls. The EFM8BB1/BB2 Busy Bee family features high-performance analog and digital peripherals that make these devices a versatile choice for controlling power mirrors, headlights and seats.
All EFM8 MCUs released this time are based on the 8051 core and combine different functions and performances, including high-speed pipelined 8051 core, ultra-low power, precision simulation, enhanced communication peripherals, on-chip oscillator, small package And the patented Crossbar architecture, which provides flexible digital and analog peripheral pin multiplexing to simplify printed circuit board (PCB) design and I/O pin routing.
The EFM8SB Sleepy Bee MCU Series is Silicon Labs' most energy-efficient 8-bit MCU, delivering unparalleled touch performance, ultra-low sleep mode power consumption (only 50nA in memory content hold and brownout detection enabled) and fast 2μs wake-up time . The automotive grade EFM8SB1 device supports an ambient temperature range of -40°C to +85°C with a core speed of up to 25MHz and a flash memory capacity of up to 8KB. The family of MCUs integrates a 12-bit analog-to-digital converter (ADC), high-performance timers, temperature sensors, and enhanced SPI, I2C, and UART serial ports. The on-chip high-resolution capacitance-to-digital converter (CDC) provides ultra-low-power touch-wake capability (1μA) and 12 reliable capacitive touch-sensing channels that can replace physical keyswitches in many applications. The MCU is ideal for touch-based controls such as dome lights and overhead buttons. Capacitive touch control provides a more durable and moisture-proof user interface for today's electronically loaded vehicles, as well as a more stylish look.
Silicon Labs leverages the CapaciTIve Sense Library integrated into the SimplicityStudioTM development kit to support touch-sensitive interface design, providing all the logic needed to add capacitive sensing buttons to automotive applications. SimplicityStudio provides designers with firmware for immediate production, from scan buttons to noise filtering. By using the CapaciTIve Sense Profiler tool to visualize the noise levels of real-time data and capacitive touch buttons, developers can easily customize touch and non-touch thresholds and noise filtering configurations, greatly simplifying the need to add capacitive touch to the in-vehicle user interface. Difficulty.
The EFM8BB1/BB2 Busy Bee MCU series provides a good balance of performance, energy efficiency and price for cost-sensitive applications. In addition to up to 50MHz core speed and 2-64KB of flash memory, the MCUs offer a range of high-performance peripherals in packages as small as 3mm x 3mm, including high-resolution 12-bit ADCs and high-speed 12-bit modulo Converter (DAC), low power comparator, built-in reference power supply, throughput-enhanced communication peripherals, and internal oscillator. This extraordinary single-chip integrated design eliminates the need for discrete analog components while reducing system cost and board space.
With a wide temperature range of -40°C to +125°C, the EFM8BB1/BB2 devices are suitable for applications that must meet stringent automotive qualifications, operate over a wide temperature range, and provide high performance at all temperatures. The EFM8BB1 device offers the best price/performance for cost-sensitive designs, while the EFM8BB2 offers enhanced analog and digital peripheral performance. For analog-intensive automotive body control applications such as seat adjustment, fan control, window lift and fuel tank sensors, the EFM8BB1/BB2 MCU is a good choice.
Simplicity Studio's Configurator and Energy Profiler help developers accelerate the design process and optimize energy efficiency. EFM8 customers can download the Simplicity Studio tool for free from the official Silicon Labs website.
Price and availabilitySamples of the automotive grade EFM8SB1 and EFM8BB1/BB2 MCUs in a space-constrained QFN package are available now and are available in volume. At 10,000-piece quantities, the EFM8SB1 MCU is priced at $0.59 each, the EFM8BB1 MCU is priced at $0.47 each, and the EFM8BB2 MCU is priced at $0.71 each. The entry-level development kits for these automotive-grade MCUs are priced at $29 per set (manufacturer's suggested retail price). For more information on the new AEC-Q100 certified EFM8 MCUs, or to order product samples and starter kits, please visit the official website.
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