MCUs (8-Bit) conserve power in portable device batteries.
Press Release Summary:
Comprised of 26 devices in 3 lines, STM8L series delivers scalable performance and features with less than 400 nA static power and 150 µA/MHz dynamic current. Each is built on 130 nm process and offers full CPU performance up to max operating frequency throughout 1.65-3.6 V supply voltage (Vdd) range. Use of on-chip regulator makes power consumption independent of Vdd, and multiple power management modes are also offered.
Original Press Release:
STMicroelectronics Unveils 8-bit Microcontrollers; First Implementation of Ultra-Low-Power Technology Platform
26 compatible devices deliver scalable performance and features with less than 400nA static power and industry-leading 150µA/MHz dynamic current
Geneva, September 14,2009 - STMicroelectronics (NYSE: STM), a world leader in microcontrollers, has begun volume production of the first microcontrollers to combine its high-performance 8-bit architecture with the company's recently announced ultra-low-power innovations to save power in active modes as well as when idle. The STM8L product family comprises 26 devices in three lines spanning a broad spectrum of performance and function.
The new devices will enable engineers to increase the performance and capability of their end products while satisfying market-driven requirements such as end-user demands for 'greener' products and longer battery life in portable devices and a variety of medical, industrial, e-metering, sensing or security equipment. Designers will also choose these ultra-low-power microcontrollers to comply with low-power product-design guidelines such as Energy Star, the IEA 1-Watt Plan, or the EU's EuP directive.
"The ultra-low-power platform underpinning the new STM8L product line represents a significant investment from ST and underlines our commitment to satisfying designers' needs in this growing technology area," said Jim Nicholas, General Manager of ST's Microcontrollers Division. "Combined with the performance advantages of the STM8 architecture, this delivers an unbeatable value proposition that will enable technically advanced and cost-competitive end products."
The three STM8L lines are built on ST's ultra-low-power technology platform using a dedicated, proprietary 130nm process optimized for ultra-low leakage. Unique advantages include full CPU performance up to the maximum operating frequency throughout the entire supply voltage (Vdd) range, from 1.65V to 3.6V. Moreover, using an on-chip regulator, power consumption is independent of Vdd, thereby providing extra flexibility and simplifying design.
Other innovations include low-power embedded non-volatile memory and multiple power-management modes including a 5.4µA Low-Power Run mode, 3.3µA Low-Power Wait mode, 1µA Active Halt with full RTC, and 350nA Halt mode. The device can wake from Halt within 4µs, enabling frequent use of the lowest-power mode. Low-power peripherals including the sub-1µA RTC and Automatic Wake-Up (AWU) unlock further savings. Overall, this platform enables dynamic current consumption as low as 150µA/MHz.
Another feature of the low-power platform is to ensure the integrated analog circuitry remains functional down to 1.8V operating voltage, which maximizes the MCU's functionality over the complete Vdd range.
Developers will also appreciate pin and software compatibility between all devices, as well as the added flexibility and scalability that come from the homogenous peripheral set shared with ST's 32-bit STM32 product lines.
The STM8L101 line is the entry point of the STM8L ultra-low-power 8-bit portfolio. This family delivers a high level of integration in an ultra-small footprint, with Flash density up to 8Kbyte and 20-, 28- and 32-pin package options.
Of the two other product lines making up the product range, the STM8L15x lines are now sampling to major customers, and add extra features including up to 32Kbytes on-chip Flash and up to 2Kbytes SRAM, external crystal/clock capability, enhanced reset features, and support for Direct Memory Access (DMA). There are also additional peripherals including a motor-control timer, increased analog capabilities, real-time clock, and fast ADC and DAC functions. On-chip EEPROM with true Read While Write (RWW) capability saves complex and expensive emulation in Flash.
The third line, the STM8L152, also features an integrated LCD controller. The STM8L151 and STM8L152 lines are scheduled for production availability in early 2010.
Family pricing starts with the STM8L101 4Kbyte Flash version in QFN20 3x3mm low-profile package: 10,000-units resale price is $0.68.
About STMicroelectronics
STMicroelectronics is a global leader serving customers across the spectrum of electronics applications with innovative semiconductor solutions. ST aims to be the undisputed leader in multimedia convergence and power applications leveraging its vast array of technologies, design expertise and combination of intellectual property portfolio, strategic partnerships and manufacturing strength. In 2008, the Company's net revenues were $9.84 billion. Further information on ST can be found at www.st.com.
Information last updated Jun 2009
Further Technical Information
ST's ultra-low-power technology platform is developed for 8-bit and 32-bit MCUs, and was revealed in June 2009. It is based on a proprietary 130nm process optimized for low leakage, and also incorporates innovative low-power embedded memory and analog circuitry in addition to established power-saving MCU design techniques. Unique advantages such as the support for operation up to the maximum operating frequency throughout the entire supply voltage (Vdd) range, with power consumption independent of Vdd, enhance flexibility for developers and simplify design.
In addition, provision of multiple low-power modes allows STM8L MCUs to fulfil a wide variety of applications with operating requirements from complete switch off to continuous monitoring at ultra-low frequency. Clock gating for peripherals further reduces overall run- and wait-mode current consumption.
The ultra-low-power platform also implements an advanced and flexible clock system supporting multiple internal and external clock sources. This allows developers to optimize frequencies and clock sources on the fly to satisfy the needs of the application at the lowest possible power consumption.
Features such as the RTC and Automatic Wake-Up (AWU) unit drawing less than 1µA, and the sub-4µs wake-up when in lowest-power mode, allow power-efficient operation when regular or frequent system wake-up is required. Integrated system safety and security features are also optimized for ultra-low-power consumption, and include Power-On Reset (POR/PDR) as well as an optional Activation Brown-Out Reset (BOR).
The on-board DMA feature of the STM8L151 and STM8L152 families allows peripherals to function independently from the core. This enables significant extra power savings by switching off Flash memory and the CPU while maintaining required peripherals in an active state.
All STM8L devices also benefit from ST's advanced 8-bit STM8 MCU architecture, which achieves outstanding performance through features such as 16-bit index registers, 16Mbyte linear address space, and high cycles-per-instruction efficiency enabling 16 CISC MIPS processing at 16MHz.
All devices operate from -40°C to +85°C. High-temperature versions specified for operation up to +125°C are also available.
