STM32H7A3ZIT6Q - Cortex-M7 MCU 280MHz 2MB Flash | STMicroelectronics
MPN: STM32H7A3ZIT6Q ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.45 | $18.45 |
| 10 | $16.9 | $169.00 |
| 100 | $14.25 | $1,425.00 |
| 500 | $12.8 | $6,400.00 |
| 1,000 | $11.5 | $11,500.00 |
STM32H7A3ZIT6Q Overview
What is an ARM Cortex-M7 microcontroller? It is a 32-bit RISC processor core designed by Arm for embedded real-time workloads. The Cortex-M7 superset within the Cortex-M family introduces a six-stage superscalar pipeline, dual-issue capability, single/double-precision FPU, DSP extensions, and an instruction cache (I-cache) plus data cache (D-cache) with optional TCM (Tightly Coupled Memory) interfaces. In the broader taxonomy it sits above Cortex-M4 (no cache, no dual-issue) and below Cortex-A application processors, occupying the high-performance MCU tier.
Key features of the STM32H7A3ZIT6Q include the Cortex-M7 core with double-precision FPU and L1 cache (16 KB I-cache + 16 KB D-cache), Chrom-ART graphics accelerator for TFT-LCD pipelines, up to 1.4 MB contiguous SRAM with multiple block options, two 16-bit ADCs (up to 3.6 MSPS), two 12-bit DACs, multiple U(S)ART/SPI/I2C/FDCAN/USB interfaces, SDMMC, Ethernet MAC, and a JTAG/SWD debug interface. The device integrates a 32-bit timer, 16-bit timers, and an HRTIM high-resolution timer for power-conversion control.
Architecturally, the H7A3 line leverages ST's 40 nm embedded-Flash process, with bus-matrix decoupling of code (TCM), main SRAM, and peripherals for deterministic interrupt latency. The dual-bank Flash supports read-while-write, allowing firmware updates without halting execution. Cryptography acceleration (AES, SHA, RNG) is included for secure-boot and TLS workloads.
Typical applications include industrial motor control (field-oriented control of PMSM and induction motors via HRTIM), HMI panels with TFT-LCD rendered through Chrom-ART, building-automation controllers, solar inverters, EV charging station control boards, and audio DSP front-ends. The wide temperature range and AEC-Q100 grade extend fit to chassis ECUs and body controllers.
Design consideration: at 280 MHz the device dissipates roughly 250-400 mW depending on peripheral activity; a four-layer PCB with a continuous ground plane beneath the LQFP exposed pad is recommended to keep junction temperature within the 125 C industrial limit. Use ST's STM32CubeMX to generate pin-multiplexing tables and the HAL/LOWER-LAYER driver scaffolding.
This page synthesizes distributor pricing, drop-in same-package alternatives, and AEC-Q100 design notes not found on the standalone manufacturer datasheet.
Drop-in alternatives for STM32H7A3ZIT6Q — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM32H7A3ZIT6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32H7B3ZIT6Q
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32H7A3AII6Q
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32H7A3ZIT6Q Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M7 32-bit RISC |
| Maximum Clock Frequency | 280 MHz |
| FPU | Double-precision |
| DSP Extensions | Yes (single-cycle MAC, SIMD) |
| L1 Cache | 16 KB I-cache + 16 KB D-cache |
| Flash Memory | 2 MB (2M x 8) |
| SRAM | 1376 KB |
| Package | 144-LQFP (20x20 mm) |
| Operating Voltage | 1.62 V to 3.6 V |
| Operating Temperature | -40 C to +125 C (industrial, AEC-Q100 grade) |
| Mounting Type | Surface Mount |
| ADC | 2x 16-bit, up to 3.6 MSPS |
| DAC | 2x 12-bit |
| Communication Interfaces | U(S)ART, SPI, I2C, FDCAN, USB OTG, SDMMC, Ethernet MAC |
| Graphics Accelerator | Chrom-ART (DMA2D) |
| Timers | 32-bit, 16-bit, HRTIM (high-resolution) |
| Cryptography | AES-256, SHA-256, TRNG |
| RoHS Status | Compliant |
STM32H7A3ZIT6Q Pin Configuration
| Pin 1 | PE2 — GPIO PE2 / TRACECLK / SPI4_SCK / SAI1_MCLK_A / TIM9_CH1 / ETH_MII_TXD3 |
| Pin 2 | PE3 — GPIO PE3 / TRACED0 / SAI1_SD_B |
| Pin 3 | PE4 — GPIO PE4 / TRACED1 / SPI4_NSS / SAI1_FS_A / DFSDM1_DATIN3 |
| Pin 4 | PE5 — GPIO PE5 / TRACED2 / TIM9_CH2 / SPI4_MISO / SAI1_SCK_A |
| Pin 5 | PE6 — GPIO PE6 / TRACED3 / TIM1_BKIN / SPI4_MOSI / SAI1_SD_A |
| Pin 6 | VBAT — Battery backup domain supply |
| Pin 7 | PC13 — GPIO PC13 / RTC_TAMP1 / RTC_OUT |
| Pin 8 | PC14 — GPIO PC14 / OSC32_IN (LSE) |
| Pin 9 | PC15 — GPIO PC15 / OSC32_OUT (LSE) |
| Pin 10 | VSS — Ground |
| Pin 11 | VDD — Digital supply 1.62-3.6 V |
| Pin 12 | OSC_IN — HSE oscillator input |
| Pin 13 | OSC_OUT — HSE oscillator output |
| Pin 14 | NRST — Reset input (active low) |
| Pin 15 | PA0 — GPIO PA0 / TIM2_CH1 / TIM5_CH1 / UART4_TX |
| Pin 16 | PA1 — GPIO PA1 / TIM2_CH2 / TIM5_CH2 / UART4_RX |
| Pin 17 | PA2 — GPIO PA2 / TIM2_CH3 / TIM5_CH3 / USART2_TX |
| Pin 18 | PA3 — GPIO PA3 / TIM2_CH4 / TIM5_CH4 / USART2_RX |
| Pin 19 | VSS — Ground |
| Pin 20 | VDD — Digital supply |
| Pin 21 | PA4 — GPIO PA4 / SPI1_NSS / SPI3_NSS / USART2_CK / DAC1_OUT |
| Pin 22 | PA5 — GPIO PA5 / TIM2_CH1 / TIM8_CH1N / SPI1_SCK / DAC2_OUT |
| Pin 23 | PA6 — GPIO PA6 / TIM1_BKIN / SPI1_MISO / TIM3_CH1 |
| Pin 24 | PA7 — GPIO PA7 / TIM1_CH1N / SPI1_MOSI / TIM3_CH2 / ETH_MII_RX_DV |
| Pin 25 | PC4 — GPIO PC4 / USART1_TX / SPI1_MISO / ETH_MII_RXD0 |
| Pin 26 | PC5 — GPIO PC5 / USART1_RX / SPI1_MOSI / ETH_MII_RXD1 |
| Pin 27 | PB0 — GPIO PB0 / TIM1_CH2N / TIM3_CH3 / SPI5_SCK / ETH_MII_RXD2 |
| Pin 28 | PB1 — GPIO PB1 / TIM1_CH3N / TIM3_CH4 / SPI5_MISO / ETH_MII_RXD3 |
| Pin 29 | PB2 — GPIO PB2 / SAI1_SD_A / SPI3_MOSI / TIM8_CH1N |
| Pin 30 | PE7 — GPIO PE7 / TIM1_ETR / UART7_RX / SPI5_SCK |
| Pin 31 | PE8 — GPIO PE8 / TIM1_CH1N / UART7_TX / SPI5_MISO |
| Pin 32 | PE9 — GPIO PE9 / TIM1_CH1 / UART7_RTS / SPI5_MOSI |
| Pin 33 | PE10 — GPIO PE10 / TIM1_CH2N / UART7_CTS |
| Pin 34 | PE11 — GPIO PE11 / TIM1_CH2 / SPI4_NSS |
| Pin 35 | PE12 — GPIO PE12 / TIM1_CH3N / SPI4_SCK |
| Pin 36 | PE13 — GPIO PE13 / TIM1_CH3 / SPI4_MISO |
| Pin 37 | PE14 — GPIO PE14 / TIM1_CH4 / SPI4_MOSI |
| Pin 38 | PE15 — GPIO PE15 / TIM1_BKIN / USART1_CK |
| Pin 39 | PB10 — GPIO PB10 / TIM2_CH3 / I2C2_SCL / SPI2_SCK / USART3_TX |
| Pin 40 | PB11 — GPIO PB11 / TIM2_CH4 / I2C2_SDA / SPI2_MISO / USART3_RX |
| Pin 41 | VCAP_1 — Core regulator decoupling capacitor pin |
| Pin 42 | VDD — Digital supply |
| Pin 43 | PH14 — GPIO PH14 / TIM8_CH2N / UART4_TX |
| Pin 44 | PH15 — GPIO PH15 / TIM8_CH3N / UART4_RX |
| Pin 45 | PA8 — GPIO PA8 / TIM1_CH1 / USART1_CK / OTG_FS_SOF / MCO1 |
| Pin 46 | PA9 — GPIO PA9 / TIM1_CH2 / USART1_TX / OTG_FS_VBUS |
| Pin 47 | PA10 — GPIO PA10 / TIM1_CH3 / USART1_RX / OTG_FS_ID |
| Pin 48 | PA11 — GPIO PA11 / TIM1_CH4 / USART1_CTS / CAN1_RX / OTG_FS_DM |
| Pin 49 | PA12 — GPIO PA12 / TIM1_ETR / USART1_RTS / CAN1_TX / OTG_FS_DP |
| Pin 50 | PA13 — GPIO PA13 / JTMS-SWDIO |
| Pin 51 | VCAP_2 — Core regulator decoupling capacitor pin |
| Pin 52 | VDD — Digital supply |
| Pin 53 | PA14 — GPIO PA14 / JTCK-SWCLK |
| Pin 54 | PA15 — GPIO PA15 / JTDI / TIM2_CH1 / SPI1_NSS / SPI3_NSS / UART4_RTS |
| Pin 55 | PC10 — GPIO PC10 / SPI3_SCK / USART3_TX / UART4_TX |
| Pin 56 | PC11 — GPIO PC11 / SPI3_MISO / USART3_RX / UART4_RX |
| Pin 57 | PC12 — GPIO PC12 / SPI3_MOSI / USART3_CK / UART5_TX |
| Pin 58 | PD0 — GPIO PD0 / CAN1_RX / SPI4_MISO / SAI1_SD_A / UART4_RX |
| Pin 59 | PD1 — GPIO PD1 / CAN1_TX / SPI4_MOSI / SAI1_FS_A / UART5_RX |
| Pin 60 | PD2 — GPIO PD2 / TIM3_ETR / UART5_RX / SDMMC1_CMD |
| Pin 61 | PD3 — GPIO PD3 / SPI2_SCK / USART2_CTS / SDMMC1_D0 |
| Pin 62 | PD4 — GPIO PD4 / USART2_RTS / SDMMC1_D1 |
| Pin 63 | PD5 — GPIO PD5 / USART2_TX / SDMMC1_D2 |
| Pin 64 | VSS — Ground |
| Pin 65 | VDD — Digital supply |
| Pin 66 | PB6 — GPIO PB6 / TIM4_CH1 / I2C1_SCL / USART1_TX / CAN2_TX / SDMMC1_D3 |
| Pin 67 | PB7 — GPIO PB7 / TIM4_CH2 / I2C1_SDA / USART1_RX / CAN2_RX / SDMMC1_D4 |
| Pin 68 | BOOT0 — Boot mode select (0=Flash, 1=System Memory bootloader) |
| Pin 69 | PB8 — GPIO PB8 / TIM4_CH3 / I2C1_SCL / SDMMC1_D5 / UART5_RX |
| Pin 70 | PB9 — GPIO PB9 / TIM4_CH4 / I2C1_SDA / SDMMC1_D6 / UART5_TX |
| Pin 71 | PE0 — GPIO PE0 / TIM4_ETR / UART8_RX / SAI1_MCLK_B / SDMMC1_D7 |
| Pin 72 | PE1 — GPIO PE1 / UART8_TX / SAI1_SD_B |
| Pin 73 | VSS — Ground |
| Pin 74 | VDD — Digital supply |
| Pin 75 | VSS — Ground (analog) |
| Pin 76 | VDDA — Analog supply (for ADC/DAC) |
| Pin 77 | VREF+ — ADC positive reference voltage |
| Pin 78 | PA0 — [DATA_NEEDED: pin description] |
| Pin 79 | PA1 — [DATA_NEEDED: pin description] |
| Pin 80 | VREF- — ADC negative reference |
| Pin 81 | PA2 — [DATA_NEEDED: pin description] |
| Pin 82 | PA3 — [DATA_NEEDED: pin description] |
| Pin 83 | VSSA — Analog ground |
| Pin 84 | PB12 — GPIO PB12 / TIM4_CH1 / I2C2_SCL / SPI2_NSS / USART3_CK / CAN2_RX / OTG_HS_ID |
| Pin 85 | PB13 — GPIO PB13 / TIM4_CH2 / SPI2_SCK / USART3_CTS / CAN2_TX / OTG_HS_VBUS |
| Pin 86 | PB14 — GPIO PB14 / TIM4_CH3 / SPI2_MISO / USART3_RTS |
| Pin 87 | PB15 — GPIO PB15 / TIM4_CH4 / SPI2_MOSI |
| Pin 88 | PD8 — GPIO PD8 / USART3_TX / SDMMC1_D0 |
| Pin 89 | PD9 — GPIO PD9 / USART3_RX / SDMMC1_D1 |
| Pin 90 | PD10 — GPIO PD10 / USART3_CK / SDMMC1_D2 |
| Pin 91 | PD11 — GPIO PD11 / USART3_CTS / SDMMC1_D3 |
| Pin 92 | PD12 — GPIO PD12 / TIM4_CH1 / USART3_RTS |
| Pin 93 | PD13 — GPIO PD13 / TIM4_CH2 / UART8_CTS |
| Pin 94 | VSS — Ground |
| Pin 95 | VDD — Digital supply |
| Pin 96 | PD14 — GPIO PD14 / TIM4_CH3 / UART8_CTS |
| Pin 97 | PD15 — GPIO PD15 / TIM4_CH4 / UART8_RTS |
| Pin 98 | PG6 — GPIO PG6 / TIM12_CH1 |
| Pin 99 | PG7 — GPIO PG7 / TIM12_CH2 / UART6_RTS |
| Pin 100 | PG8 — GPIO PG8 / TIM12_CH3 / UART6_CTS / SPI6_NSS / SDMMC1_D4 |
| Pin 101 | VSS — Ground |
| Pin 102 | VDD — Digital supply |
| Pin 103 | PG9 — GPIO PG9 / USART6_TX / SPI1_MISO / SDMMC1_D5 |
| Pin 104 | PG10 — GPIO PG10 / USART6_RX / SPI1_MOSI / SDMMC1_D6 |
| Pin 105 | PG11 — GPIO PG11 / USART6_CTS / SPI1_SCK / SDMMC1_D7 |
| Pin 106 | PG12 — GPIO PG12 / USART6_RTS / SPI6_NSS / SDMMC1_D0 |
| Pin 107 | PG13 — GPIO PG13 / USART6_CK / SPI6_SCK / SDMMC1_D1 |
| Pin 108 | PG14 — GPIO PG14 / USART6_TX / SPI6_MISO / SDMMC1_D2 |
| Pin 109 | VSS — Ground |
| Pin 110 | VDD — Digital supply |
| Pin 111 | PG15 — GPIO PG15 / USART6_CTS / SDMMC1_CK |
| Pin 112 | PB3 — GPIO PB3 / JTDO-SWO / TIM2_CH2 / SPI1_SCK / SPI3_SCK |
| Pin 113 | PB4 — GPIO PB4 / NJTRST / TIM3_CH1 / SPI1_MISO / SPI3_MISO |
| Pin 114 | PB5 — GPIO PB5 / TIM3_CH2 / I2C1_SMBA / SPI1_MOSI / SPI3_MOSI |
| Pin 115 | PG0 — GPIO PG0 / TIM8_CH1N / UART9_RX |
| Pin 116 | PG1 — GPIO PG1 / TIM8_CH1 / UART9_TX |
| Pin 117 | PG2 — GPIO PG2 / TIM8_CH2N |
| Pin 118 | PG3 — GPIO PG3 / TIM8_CH2 |
| Pin 119 | PG4 — GPIO PG4 / TIM8_CH3 |
| Pin 120 | PG5 — GPIO PG5 / TIM8_CH3N |
| Pin 121 | PA8 — [DATA_NEEDED: pin description] |
| Pin 122 | PA9 — [DATA_NEEDED: pin description] |
| Pin 123 | PA10 — [DATA_NEEDED: pin description] |
| Pin 124 | PA11 — [DATA_NEEDED: pin description] |
| Pin 125 | PA12 — [DATA_NEEDED: pin description] |
| Pin 126 | PA13 — [DATA_NEEDED: pin description] |
| Pin 127 | VSS — Ground |
| Pin 128 | VDD — Digital supply |
| Pin 129 | PA14 — [DATA_NEEDED: pin description] |
| Pin 130 | PA15 — [DATA_NEEDED: pin description] |
| Pin 131 | PC6 — GPIO PC6 / TIM3_CH1 / USART6_TX / SDMMC1_D0 |
| Pin 132 | PC7 — GPIO PC7 / TIM3_CH2 / USART6_RX / SDMMC1_D1 |
| Pin 133 | PC8 — GPIO PC8 / TIM3_CH3 / USART6_CK / SDMMC1_D2 |
| Pin 134 | PC9 — GPIO PC9 / TIM3_CH4 / USART6_CTS / SDMMC1_D3 |
| Pin 135 | PA0 — [DATA_NEEDED: pin description] |
| Pin 136 | VSS — Ground |
| Pin 137 | VDD — Digital supply |
| Pin 138 | PA1 — [DATA_NEEDED: pin description] |
| Pin 139 | PA2 — [DATA_NEEDED: pin description] |
| Pin 140 | PA3 — [DATA_NEEDED: pin description] |
| Pin 141 | PA4 — [DATA_NEEDED: pin description] |
| Pin 142 | PA5 — [DATA_NEEDED: pin description] |
| Pin 143 | VSS — Ground |
| Pin 144 | VDD — Digital supply |
Typical Applications
STM32H7A3ZIT6Q is suitable for 6 applications: Industrial Motor Control (FOC / PMSM Drive), Automotive Body / Chassis ECU, HMI / TFT-LCD Touch Panel Controller, Solar Inverter / Power Conversion Controller, Audio DSP Front-End / Pro-Audio Mixer, Industrial Gateway / Edge Controller.
Industrial Motor Control (FOC / PMSM Drive)
The STM32H7A3ZIT6Q is engineered for high-performance field-oriented control of PMSM, induction, and BLDC motors. Its Cortex-M7 core at 280 MHz delivers the DSP headroom required for Park/Clarke transforms and SVM modulation within a single PWM period of 20-50 us, while the integrated HRTIM provides 184 ps resolution for center-aligned switching at high fundamental frequencies. The two 16-bit ADCs with 3.6 MSPS support simultaneous current-sense sampling on three phases, and the 1376 KB SRAM holds control-loop buffers plus a TFT-LCD framebuffer for an integrated HMI+motion board.
Recommended
Automotive Body / Chassis ECU
AEC-Q100 grade 'Q' qualification plus the -40 C to +125 C operating range make the STM32H7A3ZIT6Q a strong fit for body controllers, door-zone modules, and chassis ECUs. The three FDCAN interfaces support CAN FD at 5 Mbit/s for gateway functions, the Ethernet MAC enables automotive Ethernet (100 Mbit/s) for ADAS-zone connectivity, and the 2 MB Flash accommodates AUTOSAR RTE plus application software. Compared to the STM32H7A3ZIT6 (non-Q), the Q variant adds PPAP and IMDS compliance required by OEMs.
Recommended
HMI / TFT-LCD Touch Panel Controller
The Chrom-ART (DMA2D) accelerator and 1376 KB SRAM allow the STM32H7A3ZIT6Q to drive WQVGA (480x272) or QVGA (320x240) TFT-LCDs without external graphics memory. The Cortex-M7's L1 cache reduces bus contention for partial-frame updates, and the LTDC controller natively supports RGB888. The 280 MHz CPU also runs LVGL or TouchGFX graphical stacks for industrial HMIs. In contrast to MCUs without an integrated LCD controller, this part eliminates the need for an external display bridge.
Recommended
Solar Inverter / Power Conversion Controller
For solar micro-inverters and string inverters, the STM32H7A3ZIT6Q's HRTIM with 184 ps resolution drives SiC MOSFETs at 100 kHz+ switching frequencies with precise dead-time insertion, while the two 16-bit ADCs sample inductor current and PV string voltage simultaneously. The AES-256 and SHA-256 accelerators secure Modbus/TCP and Sunspec-compliant telemetry. Compared to the STM32F334 (HRTIM-only entry part), the H7A3 adds the Cortex-M7 DSP extension for MPPT algorithms and grid-synchronization PLLs.
Recommended
Audio DSP Front-End / Pro-Audio Mixer
The Cortex-M7 with single-precision FPU and SIMD DSP extensions supports 8-16 channel audio mixing at 48 kHz/24-bit on the STM32H7A3ZIT6Q. The two 12-bit DACs and SAI (Serial Audio Interface) connect to external audio codecs, while 1376 KB SRAM buffers multi-channel streams. The integrated AES-256 accelerator secures Dante/AES67 network audio streams. Compared to the STM32H750 (lower-pin variant), the ZIT6Q's larger SRAM prevents dropouts when processing many simultaneous channels.
Recommended
Industrial Gateway / Edge Controller
The Ethernet MAC, three FDCANs, USB OTG, and SDMMC make the STM32H7A3ZIT6Q a strong fit for industrial protocol gateways (Profinet, EtherCAT, Modbus TCP). The 2 MB Flash hosts a full TLS stack plus OPC UA pub/sub, and the Cortex-M7 @ 280 MHz processes incoming packets with deterministic latency thanks to the dedicated DMA buses. The Q-grade temperature range supports outdoor cabinet deployment. Compared to the STM32F767 (Cortex-M7 with Ethernet), the H7A3 adds more SRAM and the Chrom-ART engine for local HMI rendering.
Recommended
Recommended Products Summary
Engineering reference data for STM32H7A3ZIT6Q — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32H7A3ZIT6 | STM32H7B3ZIT6Q |
|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same |
| Core | Cortex-M7 @ 280 MHz | Cortex-M7 @ 280 MHz | Cortex-M7 @ 280 MHz |
| Flash | 2 MB | 2 MB | 2 MB |
| SRAM | 1376 KB | 1376 KB | 1376 KB |
| Operating Temperature | -40 C to +125 C (Q grade) | -40 C to +85 C | -40 C to +125 C (Q grade) |
| AEC-Q100 | Yes | No | Yes |
| Chrom-ART (DMA2D) | Yes | Yes | Yes |
Key Differentiators
- AEC-Q100 grade Q qualification (vs STM32H7A3ZIT6)
- Octo-SPI external memory interface (vs STM32H7A3ZIT6)
- Larger 144-LQFP with 112 GPIO (vs STM32H7A3LIH6Q (LQFP64))
Design Notes
Use a four-layer PCB with a continuous ground plane beneath the LQFP144 footprint. Place 100 nF decoupling capacitors on every VDD pin, plus a 4.7 uF bulk capacitor per supply rail. Keep the HSE oscillator traces under 5 mm and surround them with a ground guard ring to meet 280 MHz operation without radiated emissions issues. Reference ST application note AN5787 for H7 PCB layout.
Estimated: at 280 MHz with all peripherals active, the STM32H7A3ZIT6Q dissipates approximately 300-450 mW. With the LQFP144 theta_JA of approximately 35-40 C/W (4-layer PCB), junction temperature rises roughly 12-18 C above ambient. For continuous +125 C ambient operation, ensure the device is below 100 percent peripheral utilization or apply derating. Use ST's STM32CubeIDE power calculator for exact figures.
Do not connect VCAP_1 and VCAP_2 to anything other than 2.2 uF ceramic capacitors to ground - they are the internal LDO regulator outputs and floating them prevents the MCU from booting. Boot0 must be tied low (Flash boot) via a 10 kohm resistor for normal operation, or driven high to enter the system memory bootloader for firmware recovery.
Compliance Information
AEC-Q100 grade 'Q' qualified per STMicroelectronics product datasheet. RoHS and REACH compliant. Lead-free and halogen-free packaging.
