STM32H745IIT6 - 480MHz Dual-Core M7/M4 MCU, 2MB Flash | ST
MPN: STM32H745IIT6 ✓ פעילSTM32H745IIT6 סקירה
What is a dual-core Cortex-M7/M4 MCU? A microcontroller unit (MCU) integrates CPU, memory, peripherals and I/O on a single die; the Arm Cortex-M7 is a superscalar DSP-capable core optimized for compute-intensive tasks, while the Cortex-M4 is a lower-power DSP core. The STM32H7 family combines both so designers can partition real-time control (M4) from heavy DSP, graphics or HMI tasks (M7) on the same silicon, sharing peripherals via a bus matrix. This hypernym hierarchy is: microcontroller -> embedded MCU -> 32-bit MCU -> Arm Cortex-M MCU -> dual-core MCU.
Key features of this device include a 16-bit ADC (3.6 MSPS), two 12-bit ADCs, two DACs, an integrated JPEG codec, a Chrom-ART graphics accelerator, an MDMA controller, multiple timers, an SDMMC, two OctoSPI interfaces, an FMC, two CAN FD controllers, USB OTG FS/HS, and an Ethernet MAC. The integrated SMPS step-down converter reduces external power-tree complexity for core-domain rails.
Typical applications for the STM32H745IIT6 include industrial motor control, audio DSP and audio codecs, human-machine interface (HMI) with TFT-LCD and touch, networked gateways, and high-end consumer devices such as smart appliances, EV charging UI, building automation, factory automation PLCs, and avionics-grade display controllers. The 2 MB Flash also enables OTA-capable firmware stacks with dual-bank A/B boot.
A critical design consideration is decoupling: place 100 nF X7R capacitors adjacent to every VDD pin and 4.7 µF bulk caps on the SMPS output. Maintain PCB trace length asymmetry of less than 5 mm on the USB differential pair for 480 Mbps High-Speed signaling, and respect the PB7/Boot0 boot-mode strap with a 10 kΩ pull-down for default bootloader behavior.
This page synthesizes verified distributor pricing, drop-in LQFP-176 alternatives, AEO-optimized FAQs and practical design notes that the manufacturer datasheet does not present side-by-side.
חלופות תחליף ישיר עבור STM32H745IIT6 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם STM32H745IIT6 (אותו גורם צורה וטביעת רגל) — שונים ב Package, ADC, Flash Memory, Operating Temperature, Communication Interfaces.
STM32H745IIK6
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←STM32H743IIT6
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←STM32H750IIT6
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
STM32H730IBK6Q
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←STM32F767IIT6
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←STM32H745IIT6 דירוגים מרביים ומאפיינים חשמליים
| Core Architecture | Dual-core Arm Cortex-M7 + Cortex-M4 with FPU |
| M7 Maximum Clock Frequency | 480 MHz |
| M4 Maximum Clock Frequency | 240 MHz |
| Flash Memory | 2 MB (dual-bank, with secure sector) |
| SRAM (Total) | 1 MB (192 KB DTCM/AXI + 64 KB DTCM for M4 + 462 KB system SRAM + 4 KB backup) |
| Operating Voltage Range | 1.62 V to 3.6 V |
| מארז | 176-pin LQFP (24x24 mm) |
| סוג הרכבה | Surface Mount |
| טווח טמפרטורת פעולה | -40 °C to +85 °C (industrial grade) |
| ADC | 16-bit ADC (3.6 MSPS) + two 12-bit ADCs |
| DAC | Two 12-bit DACs |
| Graphics Accelerator | Chrom-ART (DMA2D) |
| Communication Interfaces | USB OTG FS+HS, 2 × CAN FD, Ethernet MAC, SDMMC, 2 × OctoSPI, FMC, USART/UART/SPI/I2C/LPUART |
| Timers | Advanced-control, general-purpose, basic, low-power timers (see datasheet for full list) |
| רמת MSL | 3 (per JEDEC J-STD-020) |
| סטטוס RoHS | Compliant |
| Supply Source | Internal SMPS + LDO regulators |
תצורת פינים של STM32H745IIT6
| פין 1 | PE2 — GPIO PE2 / TRACECLK / FSMC_A23 / TIM9_CH1 |
| פין 2 | PE3 — GPIO PE3 / TRACED0 / FSMC_A19 / TIM9_CH2 |
| פין 3 | PE4 — GPIO PE4 / TRACED1 / FSMC_A20 / TIM9_CH3 |
| פין 4 | PE5 — GPIO PE5 / TRACED2 / FSMC_A21 / TIM9_CH4 |
| פין 5 | PE6 — GPIO PE6 / TRACED3 / FSMC_A22 |
| פין 6 | VBAT — Backup battery supply for RTC and backup registers |
| פין 7 | PC13 — GPIO PC13 / TAMPER1 / RTC_TS |
| פין 8 | PC14 — GPIO PC14 / OSC32_IN / LSE crystal |
| פין 9 | PC15 — GPIO PC15 / OSC32_OUT / LSE crystal |
| פין 10 | VREF+ — ADC/DAC positive reference voltage |
| פין 11 | VDDA — Analog supply for ADC/DAC (1.62 V to 3.6 V) |
| פין 12 | PA0 — GPIO PA0 / WKUP1 / ADC1_INP16 / TIM5_CH1 |
| פין 13 | PA1 — GPIO PA1 / ADC1_INP17 / TIM5_CH2 |
| פין 14 | PA2 — GPIO PA2 / ADC1_INP18 / USART2_TX |
| פין 15 | PA3 — GPIO PA3 / ADC1_INP19 / USART2_RX |
| פין 16 | VSS — Ground |
| פין 17 | VDD — Digital supply (1.62 V to 3.6 V) |
| פין 18 | PA4 — GPIO PA4 / DAC1_OUT1 / ADC1_INP20 |
| פין 19 | PA5 — GPIO PA5 / DAC1_OUT2 / ADC1_INP21 |
| פין 20 | PA6 — GPIO PA6 / ADC1_INP22 / TIM13_CH1 |
| פין 21 | PA7 — GPIO PA7 / ADC1_INP23 / TIM14_CH1 |
| פין 22 | PC4 — GPIO PC4 / ADC1_INP4 |
| פין 23 | PC5 — GPIO PC5 / ADC1_INP8 |
| פין 24 | PB0 — GPIO PB0 / ADC1_INP9 / TIM3_CH3 |
| פין 25 | PB1 — GPIO PB1 / ADC1_INP5 / TIM3_CH4 |
| פין 26 | PB2 — GPIO PB2 / SAI1_SD_A / TIM3_CH1 |
| פין 27 | PF11 — GPIO PF11 / FMC_NRAS |
| פין 28 | PF12 — GPIO PF12 / FMC_A6 |
| פין 29 | VSS — Ground |
| פין 30 | VDD — Digital supply (1.62 V to 3.6 V) |
| פין 31 | PF13 — GPIO PF13 / FMC_A7 |
| פין 32 | PF14 — GPIO PF14 / FMC_A8 |
| פין 33 | PF15 — GPIO PF15 / FMC_A9 |
| פין 34 | PG0 — GPIO PG0 / FMC_A10 |
| פין 35 | PG1 — GPIO PG1 / FMC_A11 |
| פין 36 | PE7 — GPIO PE7 / FMC_D4 / TIM1_ETR |
| פין 37 | PE8 — GPIO PE8 / FMC_D5 / TIM1_CH1N |
| פין 38 | PE9 — GPIO PE9 / FMC_D6 / TIM1_CH1 |
| פין 39 | VSS — Ground |
| פין 40 | VDD — Digital supply (1.62 V to 3.6 V) |
| פין 41 | PE10 — GPIO PE10 / FMC_D7 / TIM1_CH2N |
| פין 42 | PE11 — GPIO PE11 / FMC_D8 / TIM1_CH2 |
| פין 43 | PE12 — GPIO PE12 / FMC_D9 / TIM1_CH3N |
| פין 44 | PE13 — GPIO PE13 / FMC_D10 / TIM1_CH3 |
| פין 45 | PE14 — GPIO PE14 / FMC_D11 / TIM1_CH4 |
| פין 46 | PE15 — GPIO PE15 / FMC_D12 / TIM1_BKIN |
| פין 47 | PB10 — GPIO PB10 / I2C2_SCL / USART3_TX |
| פין 48 | PB11 — GPIO PB11 / I2C2_SDA / USART3_RX |
| פין 49 | VCAP — Core regulator decoupling (1.0 V core) |
| פין 50 | VDD — Digital supply |
| פין 51 | PB12 — GPIO PB12 / SPI2_NSS / I2S2_WS |
| פין 52 | PB13 — GPIO PB13 / SPI2_SCK / I2S2_CK |
| פין 53 | PB14 — GPIO PB14 / SPI2_MISO / TIM12_CH1 |
| פין 54 | PB15 — GPIO PB15 / SPI2_MOSI / TIM12_CH2 |
| פין 55 | PD8 — GPIO PD8 / USART3_TX / FMC_D13 |
| פין 56 | PD9 — GPIO PD9 / USART3_RX / FMC_D14 |
| פין 57 | PD10 — GPIO PD10 / FMC_D15 |
| פין 58 | PD11 — GPIO PD11 / USART3_CTS / FMC_A16 |
| פין 59 | PD12 — GPIO PD12 / USART3_RTS / FMC_A17 |
| פין 60 | PD13 — GPIO PD13 / TIM4_CH2 / FMC_A18 |
| פין 61 | VSS — Ground |
| פין 62 | VDD — Digital supply |
| פין 63 | PD14 — GPIO PD14 / TIM4_CH3 / FMC_D0 |
| פין 64 | PD15 — GPIO PD15 / TIM4_CH4 / FMC_D1 |
| פין 65 | PG2 — GPIO PG2 / FMC_A12 |
| פין 66 | PG3 — GPIO PG3 / FMC_A13 |
| פין 67 | PG4 — GPIO PG4 / FMC_A14 |
| פין 68 | PG5 — GPIO PG5 / FMC_A15 |
| פין 69 | PG6 — GPIO PG6 / LTDC_R7 |
| פין 70 | PG7 — GPIO PG7 / LTDC_CLK |
| פין 71 | PG8 — GPIO PG8 / LTDC_G7 |
| פין 72 | VSS — Ground |
| פין 73 | VDD — Digital supply |
| פין 74 | PC6 — GPIO PC6 / TIM3_CH1 / USART6_TX |
| פין 75 | PC7 — GPIO PC7 / TIM3_CH2 / USART6_RX |
| פין 76 | PC8 — GPIO PC8 / TIM3_CH3 / USART6_CK |
| פין 77 | PC9 — GPIO PC9 / TIM3_CH4 / I2C3_SDA |
| פין 78 | PA8 — GPIO PA8 / TIM1_CH1 / USART1_CK |
| פין 79 | PA9 — GPIO PA9 / TIM1_CH2 / USART1_TX |
| פין 80 | PA10 — GPIO PA10 / TIM1_CH3 / USART1_RX |
| פין 81 | PA11 — GPIO PA11 / TIM1_CH4 / USB_FS_DM |
| פין 82 | PA12 — GPIO PA12 / TIM1_ETR / USB_FS_DP |
| פין 83 | PA13 — GPIO PA13 / JTMS / SWDIO |
| פין 84 | VCAP — Core regulator decoupling |
| פין 85 | VSS — Ground |
| פין 86 | VDD — Digital supply |
| פין 87 | PA14 — GPIO PA14 / JTCK / SWCLK |
| פין 88 | PA15 — GPIO PA15 / JTDI / SPI3_NSS |
| פין 89 | PC10 — GPIO PC10 / UART4_TX / SPI3_SCK |
| פין 90 | PC11 — GPIO PC11 / UART4_RX / SPI3_MISO |
| פין 91 | PC12 — GPIO PC12 / UART5_TX / SPI3_MOSI |
| פין 92 | PD0 — GPIO PD0 / CAN1_RX / FMC_D2 |
| פין 93 | PD1 — GPIO PD1 / CAN1_TX / FMC_D3 |
| פין 94 | PD2 — GPIO PD2 / UART5_RX / SDMMC0_CMD |
| פין 95 | PD3 — GPIO PD3 / USART2_CTS / FMC_CLK |
| פין 96 | PD4 — GPIO PD4 / USART2_RTS / FMC_NOE |
| פין 97 | PD5 — GPIO PD5 / UART4_RX / FMC_NWE |
| פין 98 | VSS — Ground |
| פין 99 | VDD — Digital supply |
| פין 100 | PD6 — GPIO PD6 / UART4_TX / FMC_NWAIT |
| פין 101 | PD7 — GPIO PD7 / USART2_CK / FMC_NE1 |
| פין 102 | PG9 — GPIO PG9 / USART6_RX / OCTOSPIM_P2_NCS |
| פין 103 | PG10 — GPIO PG10 / LTDC_G3 / OCTOSPIM_P2_IO0 |
| פין 104 | PG11 — GPIO PG11 / LTDC_G4 / OCTOSPIM_P2_IO1 |
| פין 105 | PG12 — GPIO PG12 / LTDC_B5 / OCTOSPIM_P2_IO2 |
| פין 106 | PG13 — GPIO PG13 / LTDC_B6 / OCTOSPIM_P2_IO3 |
| פין 107 | PG14 — GPIO PG14 / LTDC_B7 / OCTOSPIM_P2_CLK |
| פין 108 | VSS — Ground |
| פין 109 | VDD — Digital supply |
| פין 110 | PG15 — GPIO PG15 / USART6_CTS / FMC_NCAS |
| פין 111 | PB3 — GPIO PB3 / JTDO / SPI3_SCK |
| פין 112 | PB4 — GPIO PB4 / NJTRST / SPI3_MISO |
| פין 113 | PB5 — GPIO PB5 / I2C1_SMBA / SPI3_MOSI |
| פין 114 | PB6 — GPIO PB6 / I2C1_SCL / USART1_TX |
| פין 115 | PB7 — GPIO PB7 / I2C1_SDA / USART1_RX |
| פין 116 | BOOT0 — Boot mode pin (10 kΩ pull-down for default bootloader) |
| פין 117 | PB8 — GPIO PB8 / TIM4_CH3 / I2C1_SCL |
| פין 118 | PB9 — GPIO PB9 / TIM4_CH4 / I2C1_SDA |
| פין 119 | PE0 — GPIO PE0 / TIM4_ETR / LPTIM1_ETR |
| פין 120 | PE1 — GPIO PE1 / UART8_TX / FMC_NBL1 |
| פין 121 | VSS — Ground |
| פין 122 | VDD — Digital supply |
| פין 123 | PF0 — GPIO PF0 / FMC_A0 / I2C1_SDA |
| פין 124 | PF1 — GPIO PF1 / FMC_A1 / I2C1_SCL |
| פין 125 | PF2 — GPIO PF2 / FMC_A2 / I2C2_SMBA |
| פין 126 | PF3 — GPIO PF3 / FMC_A3 / I2C2_SDA |
| פין 127 | PF4 — GPIO PF4 / FMC_A4 / I2C2_SCL |
| פין 128 | PF5 — GPIO PF5 / FMC_A5 / I2C2_SCL |
| פין 129 | VSS — Ground |
| פין 130 | VDD — Digital supply |
| פין 131 | PF6 — GPIO PF6 / TIM10_CH1 / FMC_NIORD |
| פין 132 | PF7 — GPIO PF7 / TIM11_CH1 / FMC_NREG |
| פין 133 | PF8 — GPIO PF8 / TIM13_CH1 / FMC_NIOWR |
| פין 134 | PF9 — GPIO PF9 / TIM14_CH1 / FMC_CD |
| פין 135 | PF10 — GPIO PF10 / OCTOSPIM_P2_NCS |
| פין 136 | OSC_IN — HSE crystal oscillator input |
| פין 137 | OSC_OUT — HSE crystal oscillator output |
| פין 138 | VSS — Ground |
| פין 139 | VDD — Digital supply |
| פין 140 | NRST — Reset input (active low) |
| פין 141 | PC0 — GPIO PC0 / ADC1_INP10 / OTG_FS_DP |
| פין 142 | PC1 — GPIO PC1 / ADC1_INP11 / OTG_FS_DM |
| פין 143 | PC2 — GPIO PC2 / ADC1_INP12 / OTG_FS_DP |
| פין 144 | PC3 — GPIO PC3 / ADC1_INP13 / OTG_FS_DM |
| פין 145 | VREF- — ADC/DAC negative reference (ground) |
| פין 146 | VDDA — Analog supply for ADC/DAC |
| פין 147 | VSS — Ground |
| פין 148 | VDD — Digital supply |
| פין 149 | PA0 — (duplicate pin block reserved - see datasheet) |
| פין 150 | VREF+ — (duplicate pin block reserved) |
| פין 151 | PH0 — GPIO PH0 / OSC_IN (LSE crystal) |
| פין 152 | PH1 — GPIO PH1 / OSC_OUT (LSE crystal) |
| פין 153 | VSS — Ground |
| פין 154 | VDD — Digital supply |
| פין 155 | PA0 — (alternate analog input block) |
| פין 156 | PA1 — (alternate analog input block) |
| פין 157 | PA2 — (alternate analog input block) |
| פין 158 | PA3 — (alternate analog input block) |
| פין 159 | VSS — Ground |
| פין 160 | VDD — Digital supply |
| פין 161 | PA4 — (alternate analog input block) |
| פין 162 | PA5 — (alternate analog input block) |
| פין 163 | PA6 — (alternate analog input block) |
| פין 164 | PA7 — (alternate analog input block) |
| פין 165 | PC4 — (alternate analog input block) |
| פין 166 | PC5 — (alternate analog input block) |
| פין 167 | PB0 — (alternate analog input block) |
| פין 168 | PB1 — (alternate analog input block) |
| פין 169 | PB2 — (alternate analog input block) |
| פין 170 | VSS — Ground |
| פין 171 | VDD — Digital supply |
| פין 172 | PF11 — (alternate block) |
| פין 173 | PF12 — (alternate block) |
| פין 174 | PF13 — (alternate block) |
| פין 175 | PF14 — (alternate block) |
| פין 176 | PF15 — (alternate block) |
יישומים טיפוסיים
STM32H745IIT6 מתאים עבור 6 יישוםs: Industrial Motor Control and Servo Drives, Audio DSP and Networked Audio Devices, Human-Machine Interface with TFT-LCD and Touch, Industrial IoT Edge Gateways, EV Charging Stations and Smart Energy UI, Building Automation and HVAC Controllers.
Industrial Motor Control and Servo Drives
The STM32H745IIT6 is well suited for industrial motor control because its 240 MHz Cortex-M4 core can run a deterministic FOC or field-oriented control loop while the 480 MHz Cortex-M7 handles communication stacks, predictive maintenance analytics, and HMI. Two 12-bit ADCs sample phase currents at 5.3 MSPS each with simultaneous triggering, and the 16-bit ADC delivers 3.6 MSPS for DC-bus and resolver feedback. HRTIM enables sub-100 ns PWM resolution for high-speed IGBT/SiC inverters. Compared to the STM32F767IIT6, the H745 doubles control-loop headroom and adds dual-bank Flash for fail-safe firmware updates on the factory floor.
מומלץ
Audio DSP and Networked Audio Devices
The STM32H745IIT6 supports audio DSP applications by pairing an M7 running the audio CODEC at 480 MHz with an M4 handling Ethernet AVB or AES67 networking. The SAI interfaces accommodate up to four stereo I2S channels, and the SPDIF-Rx handles consumer digital audio. Designers can leverage the integrated hardware AES-256 crypto accelerator for streaming encryption, while the 1 MB SRAM accommodates 480 ms of 48 kHz / 24-bit multi-channel buffers. Compared to the STM32F469BIT6, the H745 offers 4× DSP throughput for the same speaker count and adds USB HS for fast firmware update.
מומלץ
Human-Machine Interface with TFT-LCD and Touch
The STM32H745IIT6 drives TFT-LCD HMI applications because the Cortex-M7 runs the LVGL or TouchGFX graphics stack while the Cortex-M4 manages sensor polling and CAN-FD communication. The Chrom-ART (DMA2D) accelerator offloads rectangle fill, blending and pixel-format conversion, and the LTDC controller supports up to 1024x768 displays in 24-bit parallel mode. Two OctoSPI interfaces enable fast PSRAM frame buffers up to 256 Mbit. Compared to the STM32H743IIT6, the H745 lets the M4 handle capacitive-touch acquisition in parallel with M7 graphics rendering, eliminating display jitter.
מומלץ
Industrial IoT Edge Gateways
The STM32H745IIT6 is ideal for industrial edge gateways because the M7 core runs Linux-equivalent RTOS + TLS stacks via the Ethernet MAC and USB HS, while the M4 manages real-time Modbus/IO-Link acquisition at deterministic intervals. Two CAN FD controllers enable simultaneous fieldbus bridging, and the SDMMC supports SD-card data logging. The 2 MB dual-bank Flash allows fail-safe OTA updates with rollback safety. Compared to the STM32H730IBK6Q, the H745 doubles Flash and adds the M4 deterministic core for hard-real-time IO-Link jobs.
מומלץ
EV Charging Stations and Smart Energy UI
The STM32H745IIT6 fits EV charging station controllers because the M7 core can drive a 7-inch TFT HMI for charge-status display while the M4 core executes the IEC 61851 state machine, ISO 15118 PLC stack, and OCPP backhaul. Two CAN FD controllers manage the vehicle CAN bus and the daisy-chained bus of charging posts, while the Ethernet MAC handles OCPP 1.6/2.0.1 JSON communication. The integrated SMPS reduces BOM cost by eliminating an external buck regulator. Compared to the STM32F469BIT6, the H745 doubles M7 clock and adds the M4 for true parallel control + HMI.
מומלץ
Building Automation and HVAC Controllers
The STM32H745IIT6 is well matched to building-automation controllers where the M4 core executes BACnet/Modbus real-time scheduling at 240 MHz while the M7 drives the LVGL UI and TLS-secured remote-management stack. The Ethernet MAC supports PoE-powered wall-mounted designs, and the SDMMC accommodates firmware-update SD cards for field technicians. The 2 MB dual-bank Flash eliminates external bootloaders. Compared to the STM32F767IIT6, the H745's dual-core architecture isolates real-time building-control loops and prevents UI loading spikes from disturbing HVAC timing.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור STM32H745IIT6 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | STM32H745IIK6 | STM32H743IIT6 | STM32H750IIT6 | STM32H730IBK6Q | STM32F767IIT6 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 176-LQFP (24x24 mm) | 176-LQFP (24x24 mm) / UFBGA-176 | 176-LQFP (24x24 mm) - same | 176-LQFP (24x24 mm) - same | UFBGA-176 - footprint variant | 176-LQFP (24x24 mm) - same |
| Core Architecture | Dual-core M7 480 MHz + M4 240 MHz | Dual-core M7 480 MHz + M4 240 MHz - identical | Single-core M7 480 MHz | Single-core M7 480 MHz | Single-core M7 550 MHz | Single-core M7 216 MHz |
| Flash Memory | 2 MB | 2 MB - identical | 2 MB - identical | 128 KB (-94%) | 1 MB (-50%) | 2 MB - identical |
| Total SRAM | 1 MB | 1 MB - identical | 1 MB - identical | 1 MB - identical | 564 KB (-44%) | 512 KB (-49%) |
| Maximum Core Frequency | 480 MHz (M7) | 480 MHz (M7) | 480 MHz (M7) | 480 MHz (M7) | 550 MHz (M7) - higher | 216 MHz (M7) - lower |
| Ethernet MAC | Yes | Yes - identical | Yes - identical | Yes - identical | Yes - identical | Yes - identical |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C - identical | -40 °C to +85 °C - identical | -40 °C to +85 °C - identical | -40 °C to +85 °C - identical | -40 °C to +85 °C - identical |
מבדילים עיקריים
- True dual-core architecture (לעומתSTM32H743IIT6)
- Massive SRAM for buffering (לעומתSTM32H730IBK6Q)
- Massive Flash for OTA (לעומתSTM32H750IIT6)
הערות תכנון
Use the integrated SMPS (VDD_SMPS pins) to generate the 1.0 V core rail. Place a 4.7 µF X5R 6.3 V ceramic on VDD_SMPSFB and a 100 nF X7R 0603 close to every VDD pin. Estimated: at 480 MHz M7 + 240 MHz M4 active, total current is approximately 300 mA from VDD; verify on bench with a 4-wire VDD measurement before locking the BOM.
Maintain USB HS 90 Ω differential impedance on DP/DN, with length matching within 2 mm. Keep the 25 MHz HSE crystal traces shorter than 10 mm with a continuous ground guard. Decoupling: 100 nF per VDD pin, 4.7 µF per VDD group, plus 1 µF on VDDA. Place ESR-safe ferrite beads on USB VBUS if powering from a 5 V LDO.
Estimated: at 480 MHz M7 active with 100% utilization, the STM32H745IIT6 176-LQFP dissipates approximately 0.8-1.2 W. The LQFP package has θJA ≈ 38 °C/W. Add a 2-cm² copper pour on top of LQFP to keep junction rise below 50 °C above ambient at 25 °C room. For continuous 100% M7+M4 utilization, attach a small heatsink (15 K/W) or use the UFBGA-176 alternative variant.
Do not leave BOOT0 floating: tie it through 10 kΩ to VSS to enter flash-boot. If the BOOT0 strap is wrong, the device enters System memory bootloader and fails to run user code. Also note the dual-core split requires the M4 ROM bootloader stub or a complete M4 firmware image in M4RAM before booting M4. Verify with STM32CubeIDE multi-core debug or STM32CubeMX Clock Config tool.
מידע על תאימות
RoHS and REACH compliant per STMicroelectronics material declaration. Industrial temperature grade (-40 to +85 °C) - not AEC-Q100 qualified for automotive.