Ultra-Low-Power Device Continuum; Performance; Shared Peripherals; Common System Strategy - STMicroelectronics STM32L151RE Manual

Description
2.2

Ultra-low-power device continuum

The ultra-low-power family offers a large choice of cores and features. From proprietary 8-
bit to up to Cortex-M3, including the Cortex-M0+, the STM32Lx series are the best choice to
answer the user needs, in terms of ultra-low-power features. The STM32 ultra-low-power
series are the best fit, for instance, for gas/water meter, keyboard/mouse or fitness and
healthcare, wearable applications. Several built-in features like LCD drivers, dual-bank
memory, Low-power run mode, op-amp, AES 128-bit, DAC, USB crystal-less and many
others will clearly allow to build very cost-optimized applications by reducing BOM.
Note: STMicroelectronics as a reliable and long-term manufacturer ensures as much as possible
the pin-to-pin compatibility between any STM8Lxxxxx and STM32Lxxxxx devices and
between any of the STM32Lx and STM32Fx series. Thanks to this unprecedented
scalability, the old applications can be upgraded to respond to the latest market features and
efficiency demand.
2.2.1

Performance

All families incorporate highly energy-efficient cores with both Harvard architecture and
pipelined execution: advanced STM8 core for STM8L families and ARM Cortex-M3 core for
STM32L family. In addition specific care for the design architecture has been taken to
optimize the mA/DMIPS and mA/MHz ratios.
This allows the ultra-low-power performance to range from 5 up to 33.3 DMIPs.
2.2.2

Shared peripherals

STM8L15xxx, STM32L15xxx and STM32L162xx share identical peripherals which ensure a
very easy migration from one family to another:
• Analog peripherals: ADC, DAC and comparators
•
Digital peripherals: RTC and some communication interfaces
2.2.3

Common system strategy.

To offer flexibility and optimize performance, the STM8L15xxx, STM32L15xxx and
STM32L162xx family uses a common architecture:
•
Same power supply range from 1.65 V to 3.6 V
•
Architecture optimized to reach ultra-low consumption both in low-power modes and
Run mode
• Fast startup strategy from low-power modes
•
Flexible system clock
• Ultrasafe reset: same reset strategy including power-on reset, power-down reset,
brownout reset and programmable voltage detector
2.2.4

Features

ST ultra-low-power continuum also lies in feature compatibility:
•
More than 15 packages with pin count from 20 to 144 pins and size down to 3 x 3 mm
•
Memory density ranging from 2 to 512 Kbytes
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STM32L151xE STM32L152xE