Ultra-low-power ARM Cortex-M3 MCU with 256 Kbytes Flash, 32 MHz CPU, USB, 2xOp-amp

The ultra-low-power STM32L151xC and STM32L152xC devices incorporate the connectivity power of the universal serial bus (USB) with the high-performance ARM®Cortex®-M3 32-bit RISC core operating at a frequency of 32 MHz (33.3 DMIPS), a memory protection unit (MPU), high-speed embedded memories (Flash memory up to 256 Kbytes and RAM up to 32 Kbytes) and an extensive range of enhanced I/Os and peripherals connected to two APB buses.

The STM32L151xC and STM32L152xC devices offer two operational amplifiers, one 12-bit ADC, two DACs, two ultra-low-power comparators, one general-purpose 32-bit timer, six general-purpose 16-bit timers and two basic timers, which can be used as time bases.

Moreover, the STM32L151xC and STM32L152xC devices contain standard and advanced communication interfaces: up to two I2Cs, three SPIs, two I2S, three USARTs and an USB. The STM32L151xC and STM32L152xC devices offer up to 23 capacitive sensing channels to simply add a touch sensing functionality to any application.

They also include a real-time clock and a set of backup registers that remain powered in Standby mode.

Finally, the integrated LCD controller (except STM32L151xC devices) has a built-in LCD voltage generator that allows to drive up to 8 multiplexed LCDs with the contrast independent of the supply voltage.

The ultra-low-power STM32L151xC and STM32L152xC devices operate from a 1.8 to 3.6 V power supply (down to 1.65 V at power down) with BOR and from a 1.65 to 3.6 V power supply without BOR option. They are available in the -40 to +85 °C and -40 to +105 °C temperature ranges. A comprehensive set of power-saving modes allows the design of low-power applications.

Key Features

  • Ultra-low-power platform
    • 1.65 V to 3.6 V power supply
    • -40 °C to 105 °C temperature range
    • 0.29μA Standby mode (3 wakeup pins)
    • 1.15 μA Standby mode + RTC
    • 0.44 μA Stop mode (16 wakeup lines)
    • 1.4 μA Stop mode + RTC
    • 8.6 μA Low-power run mode
    • 185 μA/MHz Run mode
    • 10 nA ultra-low I/O leakage
    • 8 μs wakeup time
  • Core: ARM® Cortex®-M3 32-bit CPU
    • From 32 kHz up to 32 MHz max
    • 1.25 DMIPS/MHz (Dhrystone 2.1)
    • Memory protection unit
  • Reset and supply management
    • Low-power, ultrasafe BOR (brownout reset) with 5 selectable thresholds
    • Ultra-low-power POR/PDR
    • Programmable voltage detector (PVD)
  • Clock sources
    • 1 to 24 MHz crystal oscillator
    • 32 kHz oscillator for RTC with calibration
    • High Speed Internal 16 MHz factory-trimmed RC (+/- 1%)
    • Internal Low-power 37 kHz RC
    • Internal multispeed low-power 65 kHz to 4.2 MHz PLL for CPU clock and USB (48 MHz)
  • Pre-programmed bootloader
    • USB and USART supported
  • Development support
    • Serial wire debug supported
    • JTAG and trace supported
  • Up to 83 fast I/Os (70 I/Os 5V tolerant), all mappable on 16 external interrupt vectors
  • Memories
    • 256 KB Flash memory with ECC
    • 32 KB RAM
    • 8 KB of true EEPROM with ECC
    • 128-byte backup register
  • LCD Driver (except STM32L151xC devices) up to 8x40 segments, contrast adjustment, blinking mode, step-up converter
  • Rich analog peripherals (down to 1.8 V)
    • 2x operational amplifiers
    • 12-bit ADC 1Msps up to 25 channels
    • 12-bit DAC 2 channels with output buffers
    • 2x ultra-low-power-comparators(window mode and wake up capability)
  • DMA controller 12x channels
  • 9x peripheral communication interfaces
    • 1x USB 2.0 (internal 48 MHz PLL)
    • 3x USARTs
    • Up to 8x SPIs (2x I2S, 3x 16 Mbit/s)
    • 2x I2Cs (SMBus/PMBus)
  • 11x timers: 1x 32-bit, 6x 16-bit with up to 4 IC/OC/PWM channels, 2x 16-bit basic timers, 2x watchdog timers (independent and window)
  • Up to 23 capacitive sensing channels
  • CRC calculation unit, 96-bit unique ID

Circuit Diagram

bd_stm32l1xxxxc_256k.jpg

Design

Technical Documentation

Product Specifications
Description Version Size
DS8890 DS8890: Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 256KB Flash, 32KB SRAM, 8KB EEPROM, LCD, USB, ADC, DAC 12.0 1 MB
Application Notes
Description Version Size
AN3126 AN3126: Audio and waveform generation using the DAC in STM32 microcontrollers 2.0 829 KB
AN4775 AN4775: Basics and low-cost solution proposals to move from legacy USB2.0 connector to USB Type-C™ connector with STM32 devices 1.0 443 KB
AN1709 AN1709: EMC design guide for ST microcontrollers 2.0 843 KB
AN3960 AN3960: ESD considerations for touch sensing applications on MCUs 2.0 353 KB
AN1181 AN1181: Electrostatic discharge sensitivity measurement 1.6 49 KB
AN4566 AN4566: Extending the DAC performance of STM32 microcontrollers 2.0 365 KB
AN4776 AN4776: General-purpose timer cookbook 1.0 1 MB
AN3216 AN3216: Getting started with STM32L1xxx hardware development 7.2 674 KB
AN4312 AN4312: Guidelines for designing touch sensing applications with surface sensors 1.1 972 KB
AN3236 AN3236: Guidelines to increase the number of touch sensing touchkeys 4.0 300 KB
AN4750 AN4750: Handling of soft errors in STM32 applications 2.1 410 KB
AN4803 AN4803: High-speed SI simulations using IBIS and board-level simulations using HyperLynx SI on STM32 32-bit ARM® Cortex® MCUs 1.1 2 MB
AN4718 AN4718: How to design a VBAT system based on STM32L0/L1 series (with external components) 1.0 293 KB
AN2834 AN2834: How to get the best ADC accuracy in STM32Fx Series and STM32L1 Series devices 2.1 845 KB
AN4229 AN4229: How to implement a vocoder solution using STM32 microcontrollers 1.0 466 KB
AN4221 AN4221: I2C protocol used in the STM32 bootloader 3.0 683 KB
AN4777 AN4777: Implications of memory interface configurations on STM32L1 and STM32L0 Series microcontrollers 1.0 359 KB
AN4838 AN4838: Managing memory protection unit (MPU) in STM32 MCUs 1.0 284 KB
AN4654 AN4654: Migrating between STM32L1 and STM32L0 series microcontrollers 1.0 639 KB
AN4612 AN4612: Migrating from STM32L1 Series to STM32L4 Series microcontrollers 3.0 724 KB
AN3364 AN3364: Migration and compatibility guidelines for STM32 microcontroller applications 3.1 127 KB
AN3422 AN3422: Migration of microcontroller applications from STM32F1 to STM32L1 series 2.1 312 KB
AN2867 AN2867: Oscillator design guide for STM8S, STM8A and STM32 microcontrollers 10.0 2 MB
AN3998 AN3998: PDM audio software decoding on STM32 microcontrollers 1.3 90 KB
AN4246 AN4246: Proprietary Code Read Out Protection on STM32L1 microcontrollers 1.1 284 KB
AN4013 AN4013: STM32 cross-series timer overview 6.0 555 KB
AN2606 AN2606: STM32 microcontroller system memory boot mode 27.0 3 MB
AN4706 AN4706: STM32Cube firmware examples for STM32L1 Series 2.0 468 KB
AN3193 AN3193: STM32L1xx ultralow power features overview 2.0 234 KB
AN4310 AN4310: Sampling capacitor selection guide for MCU based touch sensing applications 3.0 208 KB
AN4316 AN4316: Tuning a STMTouch-based application 3.0 783 KB
AN3155 AN3155: USART protocol used in the STM32 bootloader 6.1 1 MB
AN3156 AN3156: USB DFU protocol used in the STM32 bootloader 4.0 394 KB
AN4879 AN4879: USB hardware and PCB guidelines using STM32 MCUs 1.0 369 KB
AN3248 AN3248: Using STM32L1 analog comparators in application cases 3.1 317 KB
AN3371 AN3371: Using the hardware real-time clock (RTC) in STM32 F0, F2, F3, F4 and L1 series of MCUs 5.1 421 KB
AN4655 AN4655: Virtually increasing the number of serial communication peripherals in STM32 applications 1.1 338 KB
Technical Notes & Articles
Description Version Size
TA0342 TA0342: Accurate power consumption estimation for STM32L1 series of ultra-low-power microcontrollers 2.1 343 KB
TN1163 TN1163: Description of WLCSP for microcontrollers and recommendations for its use 4.0 1 MB
TN0830 TN0830: How to use EWARM 6.2x with projects built with EWARM 6.1 and previous versions 1.2 97 KB
TA0340 TA0340: STM32L Cortex-M3 microcontroller for usage in low-power healthcare applications 1.2 357 KB
TN1204 TN1204: Tape and reel shipping media for STM32 microcontrollers in BGA packages 2.1 745 KB
TN1205 TN1205: Tape and reel shipping media for STM8 and STM32 microcontrollers in FPN packages 3.0 753 KB
TN1206 TN1206: Tape and reel shipping media for STM8 and STM32 microcontrollers in QFP packages 3.0 830 KB
TN1207 TN1207: Tape and reel shipping media for STM8 and STM32 microcontrollers in SO packages 1.0 755 KB
TN1208 TN1208: Tape and reel shipping media for STM8 and STM32 microcontrollers in TSSOP and SSOP packages 1.0 743 KB
Reference Manuals
Description Version Size
RM0038 RM0038: STM32L100xx, STM32L151xx, STM32L152xx and STM32L162xx advanced ARM®-based 32-bit MCUs 13.0 13 MB
Programming Manuals
Description Version Size
PM0056 PM0056: STM32F10xxx/20xxx/21xxx/L1xxxx Cortex-M3 programming manual 5.1 4 MB
Errata Sheets
Description Version Size
ES0238 ES0238: STM32L100RC and STM32L15xxC ultra-low-power device limitations 5.0 424 KB

HW Model & CAD Libraries

HW Model & CAD Libraries
Description Version Size
STM32L1 Boundary Scan Description Language (BSDL) files 1.1 131 KB
STM32L1 IBIS models 1.0 45 MB

Presentations & Training Material

Presentations
Description Version Size
Fire alarms and smoke detectors - Application guide 1.0 335 KB
STM32 - 32-bit ARM Cortex-M MCUs 3.0 1 MB
STM32 Embedded Software overview 2.3.0 777 KB
STM32 and STM8 Functional Safety Packages 2.0 1 MB
STM32 and STM8 embedded software solutions 2.0 2 MB
STM8L and STM32 L1 series - Ultra-low-power platform 2.0 789 KB

Publications and Collaterals

Flyers
Description Version Size
Get ready for the largest IoT development ecosystem 16.08 721 KB
STM32 Nucleo boards 16.07 1 MB
STM32 for makers Releasing your creativity 15.10 1 MB
Brochures
Description Version Size
STM32 32-bit MCU family - Leading supplier of ARM® Cortex®-M microcontrollers 16.02 1 MB
STM32L series - Ultra-low-power 32-bit MCUs 16.03 2 MB
White Papers
Description Version Size
STM32 More Than a Core - Circuit Cellar, Tom Cantrell 1.0 355 KB

Tools and Software

Development Tools
Embedded Software
Evaluation Tools
Hardware Development Tools
Software Development Tools
Evaluation Tool Software
MCUs Embedded Software
Product Evaluation Tools

Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STM32L151CCU6TR UFQFPN 48 7x7x0.55 Tape And Reel -40 85 Active 2.45 10000 NEC 3A991A2 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
STM32L151CCT6TR LQFP 48 7x7x1.4 Tape And Reel -40 85 Active 2.45 10000 NEC 3A991A2 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
STM32L151CCU6 UFQFPN 48 7x7x0.55 Tray -40 85 Active 2.45 10000 NEC 3A991A2 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
STM32L151CCT6 LQFP 48 7x7x1.4 Tray -40 85 Active 2.45 10000 NEC 3A991A2 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
STM32L151CCT6J LQFP 48 7x7x1.4 Tray -40 85 Active 2.94 10000 NEC 3A991A2 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STM32L151CCU6TR ActiveUFQFPN 48 7x7x0.55IndustrialEcopack2 0 0
STM32L151CCT6TR ActiveLQFP 48 7x7x1.4IndustrialEcopack2 0 0
STM32L151CCU6 ActiveUFQFPN 48 7x7x0.55IndustrialEcopack2 0 0
STM32L151CCT6 ActiveLQFP 48 7x7x1.4IndustrialEcopack2 0 0
STM32L151CCT6J ActiveLQFP 48 7x7x1.4IndustrialEcopack2
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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