STM32L081CZ MCU Datasheet

STM32L081CZ Datasheet, PDF, Equivalent


Part Number

STM32L081CZ

Description

Access line ultra-low-power 32-bit MCU

Manufacture

STMicroelectronics

Total Page 30 Pages
Datasheet
Download STM32L081CZ Datasheet


STM32L081CZ
STM32L081CB STM32L081CZ
STM32L081KZ
Access line ultra-low-power 32-bit MCU Arm®-based Cortex®-M0+,
up to 192KB Flash, 20KB SRAM, 6KB EEPROM, ADC, AES
Datasheet - production data
Features
Ultra-low-power platform
– 1.65 V to 3.6 V power supply
-40 to 125 °C temperature range
– 0.29 µA Standby mode (3 wakeup pins)
– 0.43 µA Stop mode (16 wakeup lines)
– 0.86 µA Stop mode + RTC + 20-Kbyte RAM
retention
– Down to 93 µA/MHz in Run mode
– 5 µs wakeup time (from Flash memory)
– 41 µA 12-bit ADC conversion at 10 ksps
Core: Arm® 32-bit Cortex®-M0+ with MPU
– From 32 kHz up to 32 MHz max.
– 0.95 DMIPS/MHz
Memories
– Up to 192-Kbyte Flash memory with ECC(2
banks with read-while-write capability)
– 20 -Kbyte RAM
– 6 Kbytes of data EEPROM with ECC
– 20-byte backup register
– Sector protection against R/W operation
Up to 40 fast I/Os (31 I/Os 5V tolerant)
Reset and supply management
– Ultra-safe, low-power BOR (brownout reset)
with 5 selectable thresholds
– Ultra-low-power POR/PDR
– Programmable voltage detector (PVD)
Clock sources
– 1 to 25 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 RC
– PLL for CPU clock
Pre-programmed bootloader
– USART, I2C, SPI supported
Development support
– Serial wire debug supported
LQFP32 7x7 mm
LQFP48 7x7 mm
UFQFxPN32
(5x5 mm)
UFQFPN48
(7x7 mm)
Rich Analog peripherals
– 12-bit ADC 1.14 Msps up to 16 channels (down
to 1.65 V)
– 2x ultra-low-power comparators (window mode
and wake up capability, down to 1.65 V)
7-channel DMA controller, supporting ADC, SPI,
I2C, USART, Timers, AES
Up to 10x peripheral communication interfaces
– 4x USART (2 with ISO 7816, IrDA), 1x UART
(low power)
– Up to 6x SPI 16 Mbits/s
– 3x I2C (2 with SMBus/PMBus)
11x timers: 2x 16-bit with up to 4 channels, 2x 16-bit
with up to 2 channels, 1x 16-bit ultra-low-power
timer, 1x SysTick, 1x RTC, 2x 16-bit basic, and 2x
watchdogs (independent/window)
CRC calculation unit, 96-bit unique ID
Hardware Encryption Engine AES 128-bit
All packages are ECOPACK2
November 2019
This is information on a product in full production.
DS10888 Rev 6
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www.st.com

STM32L081CZ
Contents
Contents
STM32L081xx
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Device overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.2 Ultra-low-power device continuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 Low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2 Interconnect matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3 Arm® Cortex®-M0+ core with MPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.4 Reset and supply management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4.1 Power supply schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4.2 Power supply supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4.3 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.5 Clock management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.6 Low-power real-time clock and backup registers . . . . . . . . . . . . . . . . . . . 24
3.7 General-purpose inputs/outputs (GPIOs) . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.8 Memories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.9 Boot modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.10 Direct memory access (DMA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.11 Analog-to-digital converter (ADC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.12 Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.12.1 Internal voltage reference (VREFINT) . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.13 Ultra-low-power comparators and reference voltage . . . . . . . . . . . . . . . . 27
3.14 AES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.15 Timers and watchdogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.15.1 General-purpose timers (TIM2, TIM3, TIM21 and TIM22) . . . . . . . . . . . 28
3.15.2 Low-power Timer (LPTIM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.15.3 Basic timer (TIM6, TIM7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.15.4 SysTick timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.15.5 Independent watchdog (IWDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.15.6 Window watchdog (WWDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
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DS10888 Rev 6


Features STM32L081CB STM32L081CZ STM32L081KZ Acce ss line ultra-low-power 32-bit MCU Arm -based Cortex®-M0+, up to 192KB Flash , 20KB SRAM, 6KB EEPROM, ADC, AES Datas heet - production data Features • Ul tra-low-power platform – 1.65 V to 3. 6 V power supply – -40 to 125 °C tem perature range – 0.29 µA Standby mod e (3 wakeup pins) – 0.43 µA Stop mod e (16 wakeup lines) – 0.86 µA Stop m ode + RTC + 20-Kbyte RAM retention – Down to 93 µA/MHz in Run mode – 5 µ s wakeup time (from Flash memory) – 4 1 µA 12-bit ADC conversion at 10 ksps • Core: Arm® 32-bit Cortex®-M0+ wit h MPU – From 32 kHz up to 32 MHz max. – 0.95 DMIPS/MHz • Memories – Up to 192-Kbyte Flash memory with ECC(2 b anks with read-while-write capability) – 20 -Kbyte RAM – 6 Kbytes of data EEPROM with ECC – 20-byte backup regi ster – Sector protection against R/W operation • Up to 40 fast I/Os (31 I/ Os 5V tolerant) • Reset and supply ma nagement – Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds – Ultra-low-power POR/PDR – Pro.
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