STMicroelectronics Shatters Performance Limitations for Ultra Low-Power Applications with New STM32L4 Microcontrollers
(Thomson Reuters ONE) -
New STM32 series with ARM(®) Cortex(®)-M4 core and innovative ultra-low-power
technologies sets industry's highest EEMBC(TM) ULPBench(®) efficiency score
Geneva, February 19, 2015 - STMicroelectronics (NYSE: STM), a global
semiconductor leader serving customers across the spectrum of electronics
applications, has combined its ultra low-power microcontroller technology with
ARM(®) Cortex(®)-M4 know-how to create the STM32L4 series for next-generation
energy-conscious consumer, industrial, medical, and metering applications.
The first two microcontrollers in the series, the STM32L476 and STM32L486,
feature the 80MHz ARM Cortex-M4 core with DSP and floating-point unit (FPU).
With the added advantage of the ST ART Accelerator(TM), which allows zero-wait
execution from Flash, the devices achieve up to 100 DMIPS at just 100µA/MHz
active power consumption. Up to 1MB of dual-bank Flash supports sophisticated
applications and read-while-write capability in addition to 128KB of SRAM.
STM32L4 microcontrollers leverage the full richness of ST's low-power
technologies, including dynamic voltage scaling to balance power consumption
with processing demand, smart architecture with FlexPowerControl, and seven
power-management modes with sub-mode options. These include Stop, Standby, and
Shutdown with current as low as 30nA. ST's Batch Acquisition Mode (BAM) allows
efficient data exchange with communication peripherals while in low-power mode.
The new devices have scored 123 in the standardized EEMBC(TM) ULPBench(®) tests
that compare the efficiency of ultra-low-power microcontrollers. "The STM32L4's
ULPBench score of 123 is the best in the industry today, and demonstrates that
designers can now get higher performance and larger memory without trading power
consumption," said Michel Buffa, General Manager, Microcontroller Division,
STMicroelectronics.
The overall low power consumption, high performance and DSP capability of the
Cortex-M4 core, smart analog features, and extensive digital connectivity of the
new STM32L4 series make these devices ideal for smart connected and Internet-of-
Things (IoT) applications, as well as a wide variety of industrial, medical, and
consumer products.
STM32L4 devices are sampling now to lead customers, and general release is
scheduled for Q2 2015. The STM32L476 is priced from $3.40 in the LQFP64 package,
for orders of 10,000 pieces.
Further Technical Information:
In addition to the combination of low-power technologies, the STM32L4 also
benefits from a smart architecture and peripherals to maximize efficiency and
performance while ensuring low power consumption. Digital peripherals include
USB OTG full speed with a dedicated supply that allows customers to maintain USB
communication even when the system is powered at 1.8V. There is also a Digital
Filter for Sigma-Delta Modulators (DFSDM) peripheral for connecting external
sigma-delta modulators or PDM (Pulse Density Modulation) microphones.
Analog peripherals include three 12-bit/5MSps ADCs featuring smart operation
that allows sample acquisition at low speed drawing only few tens of uA to limit
maximum current, or at maximum speed so as to return quickly to ultra-low-power
mode. The ADCs can provide up to 16-bit resolution with hardware oversampling.
There is also a voltage-reference buffer that provides a reference for ADCs,
DACs, or for external components through the VREF+ pin. In addition there are
two 12-bit DACs with sample and hold capability, which can operate during the
MCU's deep power-saving modes when overall current is reduced to a few hundred
nA. Other analog peripherals include two ultra low-power comparators that draw
as little as 300nA, as well as two op-amps with external or internal feedback
routing and Programmable Gain Amplifier (PGA) capability.
The STM32L4 smart architecture gives a further boost to performance and
efficiency by enabling concurrent transfers between the core, DMA controllers,
memories, and peripherals. FlexPowerControl is another aspect of the smart
architecture that assists power-saving design by retaining I/O levels when the
device is in low-power mode, keeping SRAM in standby, and managing independent
power supplies for specific peripherals and I/Os.
The STM32L486 integrates a hardware cryptographic co-processor (AES 256-bit).
Combined with other STM32L4 features such as an independent battery-backup
domain and tamper inputs, this provides a strong platform for security-oriented
applications such as smart meters.
For applications where heat dissipation is a challenge, such as when used in
confined environments or high ambient temperatures, high-temperature grade
devices specified up to 125°C are available.
About STMicroelectronics
ST is a global leader in the semiconductor market serving customers across the
spectrum of sense and power and automotive products and embedded processing
solutions. From energy management and savings to trust and data security, from
healthcare and wellness to smart consumer devices, in the home, car and office,
at work and at play, ST is found everywhere microelectronics make a positive and
innovative contribution to people's life. By getting more from technology to get
more from life, ST stands for life.augmented.
In 2014, the Company's net revenues were $7.40 billion. Further information on
ST can be found at www.st.com.
For Press Information Contact:
STMicroelectronics
Michael Markowitz
Director Technical Media Relations
+1 781 591 0354
michael.markowitz(at)st.com
STM32 L4 PR IMAGE:
http://hugin.info/152740/R/1895840/672458.jpg
STM32 L4 PR:
http://hugin.info/152740/R/1895840/672457.pdf
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Source: STMicroelectronics via GlobeNewswire
[HUG#1895840]
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Datum: 19.02.2015 - 15:00 Uhr
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News-ID 372845
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