STMicroelectronics introduces compact and high performance microcontrollers


Friday, December 19, 2014: The latest STM32F446 microcontrollers from STMicroelectronics introduce new choices for designers by combining enhanced ARM Cortex-M4 processing performance, compact 256Kbyte or 512KByte on-chip Flash options all with128Kbyte RAM, efficient memory-extension interfaces, and extended connectivity and communication capabilities.

Leveraging ST’s proprietary ART Accelerator[1], 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. As a result, the STM32F446 CPU delivers category-leading performance of 225 DMIPS and 608 CoreMark[2] at 180MHz executing from embedded Flash.

In addition, advanced new peripherals, as well as microcontroller 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 simplifies 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 50µA in STOP mode with all SRAM content retained.

Choosing the STM32F446 also connects designers with the extensive STM32 development ecosystem and the vast selection of over 600pin- and software-compatible microcontrollers, including the recently announced 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 popular development environments such as IAR EWARM, Keil MDK-ARM, GCC-based IDEs, or online mbed™[3].

The STM32F446 is sampling now to lead customers. Volume production is scheduled for Q12015 in packages from a tiny WLCSP81 measuring just 3.728mm x 3.85mm to a 20mm x 20mm LQFP144, and with 256Kbyte or 512Kbyte Flash, all with 128Kbyte SRAM. Budgetary pricing is from $3.75 for the STM32F446RC in 64-pin LQFP64 package with 256Kbyte Flash and 128Kbyte SRAM for orders of 10,000 pieces.

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