Silicon Lab’s latest high performance 8-bit MCUs target motor control

Silicon Labs has introduced an new highly integrated, feature-rich 8-bit microcontroller (MCUs) that has been optimised for cost-sensitive motor control applications. The C8051F85x/6x MCUs combine best-in-class analogue and communications peripherals, flash sizes ranging from 2 kB to 8 kB, high performance, small-footprint packaging and cost-effective pricing, making them suitable for brushless dc motor control applications used in remote-control helicopters and cars, PC and electric fans, electric tools and small appliances.

The F85/6x MCUs are seen as a good fit for other consumer and industrial applications such as power supplies, battery chargers, set-top boxes, projectors, lighting equipment and optical transceiver modules. These AEC-Q100-qualified MCUs can also be used in automotive body electronics applications such as window lifts and power seats.

Embedded developers are looking for economical mixed-signal MCU solutions that are able to provide high levels of integration and processing performance for analogue-intensive and computationally demanding applications such as motor control. The F85x/6x MCUs feature a high-speed 8051 core that is 50 percent faster than the closest in-class competitors and this level of performance enables finer pulse-width modulation (PWM), enhanced motor control efficiency and the ability to execute more complex algorithms for a broad range of motor speeds.

The F85x/6x MCUs also support three independent high-resolution PWM channels with a built-in overcurrent protection/fault detection capability specifically targeting motor control and power supply applications.

The F85x/6x MCUs have integrated advanced analogue and digital peripherals into a small package. They include a 12-bit multi-channel analogue-to-digital converter (ADC), two analogue comparators with programmable hysteresis and response time, and a precise internal voltage reference. The MCUs also feature an integrated precision 24.5 MHz low-power oscillator and a low-frequency 80 kHz oscillator, eliminating the need for an external clock or crystal. An on-chip temperature sensor simplifies system calibration without having to add a discrete sensor. Multiple communications peripherals (I2C, SPI and UART) also give developers the flexibility to choose their peripherals based on application requirements. The combination of all these on-chip features enables developers to minimize external components, resulting in lower system cost compared to competing MCUs.

The family features a patented crossbar architecture that enables developers to customiSe peripherals and pinout placement based on their application needs and layout constraints without worrying about pin conflicts. This architecture simplifies PCB routing, minimiSes PCB layers and ultimately reduces design time and system cost through optimal use of pins.

Silicon Labs is now offering complimentary Keil development tools for its entire portfolio of 8-bit MCUs and wireless MCUs including the new F85x/6x family. The PK51 Professional Developer”s Kit for Silicon Labs 8-bit MCUs supports new devices with extended memory and instruction sets.


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