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ARM Cortex MCUs aimed at car radios, industrial control apps

Posted: 25 Nov 2014     Print Version  Bookmark and Share

Keywords:STMicroelectronics  MCU  car radio  USART  ARM Cortex 

STMicroelectronics has unveiled its latest STM32F091 ARM Cortex-M0 MCU line-up that promises to address the resource constraints faced by similar devices aimed at cost-sensitive applications by offering large on-chip memories. The company said the devices also boast up to eight USARTs that save multiplexing communication ports in applications that include in-car audio or three-phase power metering.

With up to 256KB of Flash on-chip and a 32KB SRAM, enough to implement a Java stack, the STM32F091 can host applications that deliver user experiences normally associated with larger or more expensive devices. All variants, including those in economical 48-pin packages, have at least six USARTs. Three of the USARTs are able to support smartcard, LIN, IrDA and Modbus modes, stated ST.

The device has a flexible power architecture that allows analogue circuitry including the 12bit 1us ADC and two-channel 12bit DAC, to be operated at up to 3.6V for maximum dynamic range, while digital circuits run at lower voltage to cut power consumption. Moreover device I/Os can be powered independently, allowing direct connection to a low-voltage companion device such as an application processor without using level shifters.

With built-in CAN2.0A/B support, the STM32F091 can address consumer in-car applications connected to the vehicle network such as car radio and industrial-control applications. In addition, designers can take advantage of an integrated touch-sensing controller, as well as a SysTick timer and a real-time clock that aid real-time performance and deliver time-of-day or calendar functions.

The STM32F091 is available in different packages including 48-pin and 64-pin styles, as well as a salt-atmosphere-compatible QFP100 suitable for smart utility meters in China. Prices start from $1.59 for the STM32F091CBT6 with a 128KB Flash in the QFP48 package, for orders of 10,000 pieces.

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