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ST rolls out MCU portfolio in compact packages

Posted: 15 Dec 2014 ?? ?Print Version ?Bookmark and Share

Keywords:STMicroelectronics? MCU? ARM Cortex-M4? Internet of Things?

The recently introduced STM32F446 MCUs from STMicroelectronics bring additional options for designers by integrating enhanced ARM Cortex-M4 processing performance, compact 256KB or 512KB on-chip Flash all with 128KB RAM, efficient memory-extension interfaces, and extended connectivity and communication features.

Using ST's proprietary ART Accelerator, smart architecture and advanced 90nm Flash technology boosts the performance of the standard ARM Cortex-M4 core with its floating-point unit and DSP enhancements, stated the company. As a result, the STM32F446 CPU boasts 225 DMIPS and 608 CoreMark at 180MHz executing from embedded Flash.


In addition, advanced peripherals, as well as MCU features supporting efficient simultaneous communication via multiple interfaces, enable smarter and more interactive industrial, scientific, medical and Internet of Things (IoT) applications. The peripherals include a camera interface, seven I2S audio interfaces, a consumer electronics controller (CEC) for managing multiple HDMI devices, a SPDIF digital audio connection and a display parallel interface. There is also a USB block with dedicated power rails that enable continuous operation throughout the full core power-supply range down to 1.7V.

To allow seamless system expansion using off-chip memory, the STM32F446 includes a flexible memory controller (FMC) and dual Quad-SPI (QSPI) interface. The 90MHz FMC eases control of external SRAM, SDRAM, Flash NOR/NAND, or LCDs with embedded controllers, and supports memory-remap mode for enhanced performance. The dual QSPI can work independently from the FMC, and allows direct or memory-mapped connection to up to two external SPI NOR-Flash memories at single or dual data rate.

Developers on a tight power budget will appreciate the power-saving features inherent in the STM32F446, from its advanced 90nm process technology with dynamic voltage scaling to extensive clock gating and flexible sleep modes that reduce current to 50uA in STOP mode with all SRAM content retained, added ST.

Choosing the STM32F446 also connects designers with the extensive STM32 development ecosystem and the vast selection of over 600pin- and software-compatible MCUs including the STM32F7 series, across the spectrum of ARM Cortex-M cores. The development ecosystem comprises the open and easy-to-use STM32Cube software platform, STM32 Nucleo expandable prototype boards and STM32 Discovery boards, which can be used with development environments such as IAR EWARM, Keil MDK-ARM, GCC-based IDEs or online mbed.

The STM32F446 is sampling to lead customers. Volume production is scheduled for 1Q15 in packages from a tiny WLCSP81 measuring just 3.728 x 3.85mm to a 20 x 20mm LQFP144. Budgetary pricing is from $3.75 for the STM32F446RC in 64-pin LQFP64 package with 256KB Flash and 128KB SRAM for orders of 10,000 pieces.

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