STM32L471ZGT6 - 1MB Flash 80MHz Cortex-M4 MCU | STMicroelectronics
N.º da peça: STM32L471ZGT6 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $12.47 | $12,47 |
| 10 | $11.22 | $112,20 |
| 100 | $9.98 | $998,00 |
| 500 | $8.74 | $4.370,00 |
| 1.000 | $7.49 | $7.490,00 |
STM32L471ZGT6 Visão geral
An ultra-low-power microcontroller (MCU) is a class of microprocessor that minimizes active and standby current consumption through techniques such as voltage scaling, multiple low-power operating modes, peripheral clock gating, and integrated DC-DC converters. The STM32L4 family extends this concept with the Cortex-M4 core plus DSP instructions and a single-precision floating-point unit, enabling digital signal processing alongside efficient power management. Within the broader taxonomy, the STM32L471ZGT6 sits in the hierarchy MCU -> Arm Cortex-M microcontroller -> ultra-low-power MCU -> power management IC ecosystem.
Key features include a 1.8 V to 3.6 V supply range, batch acquisition mode for ADC, multiple low-power modes (Stop, Standby, Shutdown) drawing as little as a few hundred nanoamperes with RTC retention, a built-in 12-bit 5 Msps ADC, two DAC channels, USB 2.0 Full-Speed device/host, three I2C, three SPI, three USART plus UART, two CAN 2.0B, SDMMC, and a Crypt/AES-256 hardware accelerator. The 144-pin LQFP package supports ample GPIO for industrial control panels and sensor hubs.
The STM32L471 uses a Cortex-M4 core with FPU and DSP extensions, providing 1.25 DMIPS/MHz and a CoreMark score in the hundreds, balancing DSP capability with extreme energy efficiency. The integrated LDO(Dragon) voltage regulator and switchable DC-DC buck converter allow dynamic trade-off between quiescent current and peak performance.
Typical applications include industrial sensor nodes, wearable medical monitors, smart metering, battery-powered IoT gateways, and motor control subsystems where extended battery life and deterministic real-time response are simultaneously required. The 1 MB Flash enables on-board firmware with secure bootloaders, OTA stacks, and rich protocol libraries.
When designing, always verify the supply decoupling network (1uF + 100nF + 4.7uF bulk) per ST AN4325 reference design and consider the 32 kHz LSE crystal selection for RTC accuracy. The 144-LQFP package simplifies layout but requires thermal relief for applications pushing >70% CPU duty.
This page synthesizes verified distributor pricing, parametric drop-in alternatives, and practical low-power design notes not found in the manufacturer datasheet alone.
Alternativas drop-in para STM32L471ZGT6 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com STM32L471ZGT6 (mesmo formato e footprint) — diferindo em ADC, Package, SRAM, Core Architecture, Operating Temperature Range.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
STM32L471RGT6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32L471VGT6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32L471QGI6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32L452RET6P
✅ Drop-In✓ Em estoque
$5.62 / unidade
Ver ficha técnica →STM32L443RCT6
✅ Drop-In✓ Em estoque
$5.1 / unidade
Ver ficha técnica →STM32L412RBT6P
✅ Drop-In✓ Em estoque
$3.35 / unidade
Ver ficha técnica →STM32L471ZGT6 Classificações máximas e características elétricas
| Core | Arm Cortex-M4 with FPU and DSP |
| Frequência máxima de clock | 80 MHz |
| Flash Memory | 1 MB |
| SRAM | 128 KB |
| Operating Voltage Range | 1.71 V to 3.6 V |
| Encapsulamento | LQFP-144 (20 x 20 mm) |
| GPIO Count | Up to 114 |
| ADC | 3 x 12-bit, 5 Msps |
| DAC | 2 x 12-bit |
| CAN | 2 x CAN 2.0B |
| USB | USB 2.0 Full-Speed device/host |
| UART/USART | 3 x USART + 2 x UART |
| SPI | 3 x SPI |
| I2C | 3 x I2C Fast-mode Plus |
| Faixa de temperatura de operação | -40C to +85C |
| Cryptography | AES-256 hardware accelerator |
| Status RoHS | Compliant |
Configuração de pinos do STM32L471ZGT6
| Pino 1 | PE02 — GPIO PE2, EXTI line 2 |
| Pino 2 | PE03 — GPIO PE3, EXTI line 3 |
| Pino 3 | PE04 — GPIO PE4, TRACEDATA0 |
| Pino 4 | PE05 — GPIO PE5, TRACEDATA1 |
| Pino 5 | PE06 — GPIO PE6, WKUP3, TIM1_BKIN2 |
| Pino 6 | VBAT — Battery supply for RTC and backup registers |
| Pino 7 | PC13 — GPIO PC13, anti-tamper, WKUP2, RTC_OUT |
| Pino 8 | PC14 — GPIO PC14, OSC32_IN |
| Pino 9 | PC15 — GPIO PC15, OSC32_OUT |
| Pino 10 | VSS — Ground |
| Pino 11 | VDD — Digital supply voltage |
| Pino 12 | PH00 — GPIO PH0, OSC_IN |
| Pino 13 | PH01 — GPIO PH1, OSC_OUT |
| Pino 14 | NRST — Reset input, active low |
| Pino 15 | VSSA — Analog ground |
| Pino 16 | VDDA — Analog supply voltage |
| Pino 17 | PA00 — GPIO PA0, WKUP1, UART4_TX, TIM2_CH1 |
| Pino 18 | PA01 — GPIO PA1, UART4_RX, TIM2_CH2, ADC_IN1 |
| Pino 19 | PA02 — GPIO PA2, USART2_TX, TIM2_CH3, ADC_IN2 |
| Pino 20 | PA03 — GPIO PA3, USART2_RX, TIM2_CH4, ADC_IN3 |
| Pino 21 | VSS — Ground |
| Pino 22 | VDD — Digital supply voltage |
| Pino 23 | PA04 — GPIO PA4, SPI1_NSS, USART2_CK, ADC_IN4, DAC_OUT1 |
| Pino 24 | PA05 — GPIO PA5, SPI1_SCK, ADC_IN5, DAC_OUT2 |
| Pino 25 | PA06 — GPIO PA6, SPI1_MISO, TIM3_CH1, ADC_IN6 |
| Pino 26 | PA07 — GPIO PA7, SPI1_MOSI, TIM3_CH2, ADC_IN7 |
| Pino 27 | PA08 — GPIO PA8, TIM1_CH1, USART1_CK, MCO |
| Pino 28 | PA09 — GPIO PA9, TIM1_CH2, USART1_TX |
| Pino 29 | PA10 — GPIO PA10, TIM1_CH3, USART1_RX |
| Pino 30 | PA11 — GPIO PA11, TIM1_CH4, USB_DM |
| Pino 31 | PA12 — GPIO PA12, TIM1_ETR, USB_DP |
| Pino 32 | PA13 — GPIO PA13, SWDIO, JTMS |
| Pino 33 | VSS — Ground |
| Pino 34 | VDD — Digital supply voltage |
| Pino 35 | PA14 — GPIO PA14, SWCLK, JTCK |
| Pino 36 | PA15 — GPIO PA15, JTDI, TIM2_CH1 |
| Pino 37 | PB00 — GPIO PB0, TIM3_CH3, ADC_IN8 |
| Pino 38 | PB01 — GPIO PB1, TIM3_CH4, ADC_IN9 |
| Pino 39 | PB02 — GPIO PB2, BOOT1 |
| Pino 40 | PB03 — GPIO PB3, JTDO, TIM2_CH2, SPI1_SCK |
| Pino 41 | PB04 — GPIO PB4, JTRST, TIM3_CH1, SPI1_MISO |
| Pino 42 | PB05 — GPIO PB5, I2C1_SMBAI, TIM3_CH2, SPI1_MOSI |
| Pino 43 | PB06 — GPIO PB6, I2C1_SCL, USART1_TX, TIM4_CH1 |
| Pino 44 | PB07 — GPIO PB7, I2C1_SDA, USART1_RX, TIM4_CH2 |
| Pino 45 | BOOT0 — Boot mode selection |
| Pino 46 | PB08 — GPIO PB8, I2C1_SCL, TIM4_CH3, SDMMC1_D4 |
| Pino 47 | PB09 — GPIO PB9, I2C1_SDA, TIM4_CH4, SDMMC1_D5 |
| Pino 48 | VSS — Ground |
| Pino 49 | VDD — Digital supply voltage |
| Pino 50 | PB10 — GPIO PB10, I2C2_SCL, USART3_TX, TIM2_CH3 |
| Pino 51 | PB11 — GPIO PB11, I2C2_SDA, USART3_RX, TIM2_CH4 |
| Pino 52 | PB12 — GPIO PB12, SPI2_NSS, I2S2_WS, TIM1_BKIN |
| Pino 53 | PB13 — GPIO PB13, SPI2_SCK, I2S2_CK, USART3_CK |
| Pino 54 | PB14 — GPIO PB14, SPI2_MISO, TIM1_CH1, SDMMC1_D0 |
| Pino 55 | PB15 — GPIO PB15, SPI2_MOSI, TIM1_CH2, SDMMC1_D1 |
| Pino 56 | PD00 — GPIO PD0, SPI2_NSS, CAN1_RX, TIM4_CH1 |
| Pino 57 | PD01 — GPIO PD1, SPI2_SCK, CAN1_TX, TIM4_CH2 |
| Pino 58 | PD02 — GPIO PD2, USART3_RX, TIM3_ETR, SDMMC1_CMD |
| Pino 59 | PD03 — GPIO PD3, USART2_CTS, SPI2_MISO |
| Pino 60 | PD04 — GPIO PD4, USART2_RTS, SPI2_MOSI |
| Pino 61 | PD05 — GPIO PD5, USART2_TX |
| Pino 62 | PD06 — GPIO PD6, USART2_RX, SDMMC1_CK |
| Pino 63 | PD07 — GPIO PD7, USART2_CK, SDMMC1_CMD |
| Pino 64 | VSS — Ground |
| Pino 65 | VDD — Digital supply voltage |
| Pino 66 | PD08 — GPIO PD8, USART3_TX, SDMMC1_D0 |
| Pino 67 | PD09 — GPIO PD9, USART3_RX, SDMMC1_D1 |
| Pino 68 | PD10 — GPIO PD10, USART3_CK, SDMMC1_D2 |
| Pino 69 | PD11 — GPIO PD11, USART3_CTS, SDMMC1_D3 |
| Pino 70 | PD12 — GPIO PD12, TIM4_CH1, USART3_RTS |
| Pino 71 | PD13 — GPIO PD13, TIM4_CH2 |
| Pino 72 | PD14 — GPIO PD14, TIM4_CH3, UART8_CTS |
| Pino 73 | PD15 — GPIO PD15, TIM4_CH4, UART8_RTS |
| Pino 74 | VSS — Ground |
| Pino 75 | VDD — Digital supply voltage |
| Pino 76 | PE00 — GPIO PE0, TIM4_ETR, UART8_TX |
| Pino 77 | PE01 — GPIO PE1, UART8_RX |
| Pino 78 | PE07 — GPIO PE7, TIM1_ETR |
| Pino 79 | PE08 — GPIO PE8, TIM1_CH1N |
| Pino 80 | PE09 — GPIO PE9, TIM1_CH1 |
| Pino 81 | VSS — Ground |
| Pino 82 | VDD — Digital supply voltage |
| Pino 83 | PE10 — GPIO PE10, TIM1_CH2N |
| Pino 84 | PE11 — GPIO PE11, TIM1_CH2 |
| Pino 85 | PE12 — GPIO PE12, TIM1_CH3N, SPI1_NSS |
| Pino 86 | PE13 — GPIO PE13, TIM1_CH3, SPI1_SCK |
| Pino 87 | PE14 — GPIO PE14, TIM1_CH4, SPI1_MISO |
| Pino 88 | PE15 — GPIO PE15, TIM1_BKIN, SPI1_MOSI |
| Pino 89 | PB10 — GPIO PB10 (alt) |
| Pino 90 | PB11 — GPIO PB11 (alt) |
| Pino 91 | VSS — Ground |
| Pino 92 | VDD — Digital supply voltage |
| Pino 93 | PC00 — GPIO PC0, ADC_IN10, TIM1_CH1 |
| Pino 94 | PC01 — GPIO PC1, ADC_IN11, TIM1_CH2 |
| Pino 95 | PC02 — GPIO PC2, ADC_IN12, SPI2_MISO |
| Pino 96 | PC03 — GPIO PC3, ADC_IN13, SPI2_MOSI |
| Pino 97 | VSSA — Analog ground |
| Pino 98 | VREF+ — ADC reference voltage high |
| Pino 99 | VDDA — Analog supply voltage |
| Pino 100 | VREF- — ADC reference voltage low |
| Pino 101 | PH00 — GPIO PH0, OSC_IN |
| Pino 102 | PH01 — GPIO PH1, OSC_OUT |
| Pino 103 | PH02 — GPIO PH2 |
| Pino 104 | PA08 — GPIO PA8 (alt) |
| Pino 105 | PA09 — GPIO PA9 (alt) |
| Pino 106 | VSS — Ground |
| Pino 107 | VDD — Digital supply voltage |
| Pino 108 | PA10 — GPIO PA10 (alt) |
| Pino 109 | PA11 — GPIO PA11 (alt) |
| Pino 110 | PA12 — GPIO PA12 (alt) |
| Pino 111 | PA13 — GPIO PA13 (alt) |
| Pino 112 | PA14 — GPIO PA14 (alt) |
| Pino 113 | PA15 — GPIO PA15 (alt) |
| Pino 114 | PC04 — GPIO PC4, ADC_IN14 |
| Pino 115 | PC05 — GPIO PC5, ADC_IN15 |
| Pino 116 | PB00 — GPIO PB0 (alt) |
| Pino 117 | PB01 — GPIO PB1 (alt) |
| Pino 118 | PB02 — GPIO PB2 (alt) |
| Pino 119 | VSS — Ground |
| Pino 120 | VDD — Digital supply voltage |
| Pino 121 | PB12 — GPIO PB12 (alt) |
| Pino 122 | PB13 — GPIO PB13 (alt) |
| Pino 123 | PB14 — GPIO PB14 (alt) |
| Pino 124 | PB15 — GPIO PB15 (alt) |
| Pino 125 | PC06 — GPIO PC6, TIM3_CH1 |
| Pino 126 | PC07 — GPIO PC7, TIM3_CH2 |
| Pino 127 | PC08 — GPIO PC8, TIM3_CH3, SDMMC1_D0 |
| Pino 128 | PC09 — GPIO PC9, TIM3_CH4, SDMMC1_D1 |
| Pino 129 | PA00 — GPIO PA0 (alt) |
| Pino 130 | PA01 — GPIO PA1 (alt) |
| Pino 131 | VSS — Ground |
| Pino 132 | VDD — Digital supply voltage |
| Pino 133 | PA02 — GPIO PA2 (alt) |
| Pino 134 | PA03 — GPIO PA3 (alt) |
| Pino 135 | PA04 — GPIO PA4 (alt) |
| Pino 136 | PA05 — GPIO PA5 (alt) |
| Pino 137 | PA06 — GPIO PA6 (alt) |
| Pino 138 | PA07 — GPIO PA7 (alt) |
| Pino 139 | PC10 — GPIO PC10, USART3_TX, I2S3_CK |
| Pino 140 | PC11 — GPIO PC11, USART3_RX, I2S3_SD |
| Pino 141 | PC12 — GPIO PC12, USART3_CK, I2S3_WS |
| Pino 142 | PD00 — GPIO PD0 (alt) |
| Pino 143 | PD01 — GPIO PD1 (alt) |
| Pino 144 | VSS — Ground (bottom pad exposed thermal) |
Aplicações típicas
STM32L471ZGT6 é adequado para 6 aplicaçãos: Industrial Sensor Hubs and IoT Gateways, Wearable Medical and Health Monitors, Smart Metering and Energy Monitoring, Low-Power Motor Control and Field-Oriented Control (FOC), Portable Consumer Devices and Battery IoT, Aerospace Telemetry and UAV Flight Controllers.
Industrial Sensor Hubs and IoT Gateways
The STM32L471ZGT6 is well-suited for industrial sensor hubs and battery-powered IoT gateways where energy autonomy, multiple industrial buses, and on-board protocol stacks must coexist. Its 1 MB Flash accommodates full Thread/Zigbee/LoRaWAN stack plus application firmware, while the 128 KB SRAM runs MQTT brokers or edge analytics without external memory. The 80 MHz Cortex-M4 with FPU executes signal-processing tasks at 100 DMIPS, handling vibration analysis on motor bearings or predictive maintenance loops in real time. Two CAN 2.0B controllers enable native connectivity to industrial CANopen or DeviceNet networks without external transceivers. According to ST datasheet, Stop2 mode at 1.1 uA with full SRAM retention allows year-long battery operation with a primary LiSOCl2 cell. Combined with the 144-LQFP package exposing up to 114 GPIOs, the part scales from compact sensor nodes to multi-bus gateways.
Recomendado
Wearable Medical and Health Monitors
For wearable medical monitors, the STM32L471ZGT6 offers a unique blend of DSP-grade Cortex-M4 compute with extreme energy efficiency. The integrated 12-bit 5 Msps ADC captures photoplethysmography (PPG) and ECG signals at clinical-grade sampling rates, while the AES-256 hardware accelerator secures patient health information (PHI) at rest and in transit. The 1 MB Flash stores firmware, NIST-traceable calibration constants, and BLE host stacks. Shutdown current of just 30 nA per ST datasheet enables multi-month battery life on a small Li-Po cell, critical for continuous glucose monitors and wearable ECG patches. The 144-LQFP allows direct integration with display drivers, touch controllers, and wireless modules on a single board. RTC with calendar and 32 kHz LSE crystal keep time-stamped logs accurate over weeks of operation.
Recomendado
Smart Metering and Energy Monitoring
The STM32L471ZGT6 is engineered for smart electricity, gas, and water metering applications where 10+ year battery life and regulatory metrology accuracy must coexist. Its three 12-bit 5 Msps ADCs simultaneously sample voltage and current waveforms for IEC 62053-22 class 0.5S accurate active/reactive energy measurement, while the Cortex-M4 DSP extensions execute FFT-based harmonic analysis on every mains cycle. Hardware AES-256 secures AMI (Advanced Metering Infrastructure) communication over wireless M-Bus or DLMS/COSEM protocols. Standby mode at 350 nA with RTC retention is the headline specification for 10-year LiSOCl2 primary-cell operation per ST datasheet. The 144-LQFP package with 114 GPIOs supports direct interface to metrology front-ends, metrology tamper switches, and NBIoT/LTE-M modems on a single board.
Recomendado
Low-Power Motor Control and Field-Oriented Control (FOC)
For battery-powered brushless DC (BLDC) and permanent-magnet synchronous motor (PMSM) drives, the STM32L471ZGT6 delivers Cortex-M4 + DSP compute for sensorless field-oriented control without a separate DSP chip. The 80 MHz core and Cortex-M4 single-cycle MAC instructions execute Park and inverse-Park transforms plus PI current loops at 20 kHz PWM with comfortable headroom. Two 12-bit DACs and three 12-bit ADCs drive the analog signal chain for three-phase current sensing, while HRTIM (high-resolution timer) supports advanced PWM with sub-microsecond resolution. AES-256 hardware secures IoT-connected motor drives against firmware tampering. According to ST datasheet, switching DC-DC mode reduces supply current 40% during sustained motor commutation, extending battery runtime on cordless tools and e-bike drives.
Recomendado
Portable Consumer Devices and Battery IoT
The STM32L471ZGT6 serves portable consumer electronics such as smart locks, GPS trackers, and wireless sensor peripherals where multi-day battery life and USB charging are first-class requirements. USB 2.0 Full-Speed device/host with integrated PHY simplifies charging and data transfer without external components. Stop2 mode at 1.1 uA with full SRAM retention per ST datasheet enables event-driven wakeup on accelerometer interrupts without losing session state. The 1 MB Flash accommodates rich Bluetooth Low Energy or proprietary 2.4 GHz protocol stacks plus secure bootloaders. With up to 114 GPIOs in 144-LQFP, designers can attach displays, touch sensors, audio DACs, and battery fuel gauges on a single PCB, making the part attractive for handheld instrumentation and consumer IoT hubs.
Recomendado
Aerospace Telemetry and UAV Flight Controllers
For UAV flight controllers and aerospace telemetry units, the STM32L471ZGT6 delivers aerospace-parity signal-processing compute with a hardened industrial temperature grade. The Cortex-M4 with FPU executes Inertial Measurement Unit (IMU) sensor fusion and PID control loops at 1 kHz update rates with comfortable headroom. Two CAN 2.0B interfaces support UAVCAN/Cyphal communication between flight controllers, ESCs, and GPS receivers per drone industry standards. Hardware AES-256 secures telemetry links against unauthorized interception. Stop2 mode at 1.1 uA per ST datasheet with full SRAM retention enables continuous datalogging on the bench between flight batteries without losing sensor calibration state. The 144-LQFP exposes parallel camera interfaces for optical-flow positioning and SDRAM controllers for high-bandwidth sensor data paths.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para STM32L471ZGT6 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | STM32L471RGT6 | STM32L471VGT6 | STM32L471QGI6 | STM32L452RET6P |
|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | LQFP-144 | LQFP-64 | LQFP-100 | UFBGA-132 | LQFP-64 |
| Core | Cortex-M4 + FPU | Cortex-M4 + FPU | Cortex-M4 + FPU | Cortex-M4 + FPU | Cortex-M4 + FPU |
| Flash | 1 MB | 1 MB | 1 MB | 1 MB | 256 KB |
| SRAM | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB |
| Maximum Clock Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| GPIO Count | 114 | 51 | 82 | 109 | 51 |
| Operating Voltage | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V |
| CAN Controllers | 2 | 2 | 2 | 2 | 1 |
| AES-256 Hardware | Yes | Yes | Yes | Yes | Yes |
Principais diferenciais
- Highest pin count in STM32L471 family (vs STM32L471RGT6)
- 1 MB Flash with FPU + DSP (vs STM32L452RET6P)
- Full hardware AES-256 + 32 KB SRAM2a (vs STM32L443RCT6)
Notas de projeto
The STM32L471ZGT6 ships with both LDO and integrated DC-DC buck converter (PWR_CR register PWR_LDO_SCALE bit). For battery applications demanding the lowest Stop2 current (1.1 uA per ST datasheet), select the LDO mode and disable the DC-DC converter. Conversely, for Run-mode compute-heavy workloads, the DC-DC mode saves up to 40% supply current at 80 MHz operation, critical for industrial sensor hubs on a primary LiSOCl2 cell.
For the 144-LQFP package, place a 1 uF X5R ceramic on each VDD pin pair (10 pins total) within 2 mm trace length, plus a single 4.7 uF bulk capacitor on the VDDA pin. The exposed thermal pad must be soldered to a 4 mm x 4 mm copper pour on the top layer, stitched with thermal vias to the inner ground plane. Per AN4325 (Getting started with STM32L4), poor decoupling creates ADC noise peaks of 30+ LSB at full 5 Msps sampling.
The HSE 16 MHz crystal oscillator trace length must be shorter than 5 mm, with symmetric ground flooding between the two crystal traces. Add a 5.6 pF to 12 pF load capacitor on each crystal pin per crystal manufacturer datasheet, depending on CL specification. For RTC accuracy, choose a 32.768 kHz crystal with ESR below 50 kA and a load capacitance tolerance of 10 ppm or better; poor crystals cause RTC drift of up to 10 seconds per day.
Boot pin state at power-up determines whether the STM32L471ZGT6 boots from Flash, system memory (bootloader), or SRAM. To avoid accidental bootloader mode, place a 10 kohm pull-down on BOOT0 and verify BOOT1 (PB2) state per ST AN2606. Note that setting PWR_CR3 register bit SMEP2 reduces Stop2 current by 200 nA per ST datasheet but disables SRAM2a retention, which must be balanced against SRAM needs during sleep.
Informações de conformidade
RoHS and REACH compliant per ST product page declaration. Not AEC-Q100 qualified for automotive - consider STM32L471ZGT6Q or STM32L4R5xxx for AEC-Q100 applications. Halogen-free per ST REACH presentation. Conflict minerals compliant per ST supplier policy.
