STM32H743IGT6 - 480MHz Cortex-M7 MCU 1MB Flash | STMicroelectronics
부품 번호: STM32H743IGT6 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $16.2 | $16.20 |
| 10 | $14.85 | $148.50 |
| 100 | $13.42 | $1,342.00 |
| 500 | $12.18 | $6,090.00 |
| 1,000 | $11.05 | $11,050.00 |
STM32H743IGT6 개요
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals. The STM32H743 belongs to the 32-bit MCU family (ARM Cortex-M class), which sits above 8-bit/16-bit microcontrollers in the semiconductor hierarchy: transistor -> logic gate -> CPU core -> microcontroller -> embedded system. Cortex-M7 devices target high-performance embedded applications that previously required a DSP or microprocessor, and the STM32H7 line extends the STM32 family from mainstream (F0/F1/F4) into premium real-time processing tiers.
Key features of the STM32H743IGT6 include: 1 MB dual-bank Flash with ECC, 1 MB SRAM split into DTCM, AXI SRAM, SRAM1-4, and Backup SRAM; a 16-bit Chrom-ART (DMA2D) accelerator; JPEG codec in hardware; up to 35 communication interfaces including 3x SPI, 4x USART/UART, 2x UART, 3x I2C, 2x CAN, USB 2.0 FS+OTG, SDMMC, and Ethernet; a 16-bit parallel camera interface; and 3x 12-bit ADCs at 3.6 MSPS plus 2x 12-bit DACs. The internal SMPS step-down converter reduces core current consumption by approximately 30% versus an external LDO supply.
The architecture uses a 7-stage superscalar pipeline with branch prediction, single-precision and double-precision FPU, and an instruction/data cache. The AXI bus matrix (64-bit wide, 480 MHz) gives sustained memory bandwidth above 4 MB/s, suitable for TFT-LCD framebuffers and audio streaming. Advanced peripherals include a TFT-LCD controller (up to XGA resolution), cryptographic accelerators (AES, hash, RNG), and a true random number generator (TRNG).
Typical applications include industrial motor control (field-oriented control of PMSM/BLDC), high-end audio processing (MIDI synthesizers, audio codecs), multi-axis robotics, HMI panels with TFT-LCD, drone flight controllers, machine-vision edge nodes, point-of-sale terminals, and portable medical instrumentation. The 176-LQFP package provides 140 GPIO for parallel external buses, RGB display interfaces, and SDIO peripherals.
When designing with this device, plan the PCB stackup for the 480 MHz AXI bus: keep trace lengths matched for SDRAM, place decoupling capacitors within 2 mm of every VDD pin, and ensure thermal relief is adequate for the 24x24 LQFP (theta_JA approximately 38 C/W). Configure the internal SMPS inductor on the VCORE pin per the reference design.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, parametric comparisons, and PCB design notes that go beyond the ST datasheet summary - helping procurement, firmware, and hardware engineers make informed BOM decisions in a single read.
드롭인 대체품: STM32H743IGT6 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: STM32H743IGT6 (동일 폼 팩터 및 풋프린트) — 차이점: Package, Communication Interfaces, FPU, Flash Memory, Maximum Clock Frequency.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
STM32H753IGT6
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
STM32H750IBT6
✅ 드롭인✓ 재고 있음
$8.85 / 개
데이터시트 보기 →STM32H742IGT6
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
STM32H733VGT6
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$8.1 / 개
데이터시트 보기 →STM32H735IGT6
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
STM32H743IGT6 최대 정격 & 전기적 특성
| Core Architecture | ARM Cortex-M7 (32-bit) |
| Maximum Clock Speed | 480 MHz |
| CoreMark Performance | 2400 CoreMark |
| DMIPS Performance | 1027 DMIPS |
| Program Memory (Flash) | 1 MB (dual-bank with ECC) |
| SRAM | 1 MB (DTCM + AXI SRAM + SRAM1-4 + Backup SRAM) |
| L1 Cache | 16 KB I-cache + 16 KB D-cache |
| FPU | Double-precision IEEE 754 |
| 공급 전압 | 1.62 V to 3.6 V |
| 패키지 | 176-LQFP (24x24 mm) |
| GPIO Count | 140 |
| 동작 온도 | -40C to +85C (Grade 6) |
| ADC | 3x 12-bit, 3.6 MSPS |
| DAC | 2x 12-bit |
| Communication Interfaces | USB FS/OTG, 2x CAN, 3x SPI, 4x USART/UART, 3x I2C, SDMMC, Ethernet |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
| Internal SMPS | Yes (step-down DC-DC for VCORE) |
| Cryptography | AES-256, hash (SHA-1/2), TRNG |
| Display Controller | TFT-LCD up to XGA (JPEG codec + DMA2D accelerator) |
STM32H743IGT6 핀 구성
| 핀 1 | PE2 — GPIO PE2 / TRACECLK / SPI4_SCK |
| 핀 2 | PE3 — GPIO PE3 / TRACED0 |
| 핀 3 | PE4 — GPIO PE4 / TRACED1 |
| 핀 4 | PE5 — GPIO PE5 / TRACED2 |
| 핀 5 | PE6 — GPIO PE6 / TRACED3 |
| 핀 6 | VBAT — Backup battery supply input |
| 핀 7 | PC13 — GPIO PC13 / RTC_OUT / WKUP1 |
| 핀 8 | PC14 — GPIO PC14 / OSC32_IN |
| 핀 9 | PC15 — GPIO PC15 / OSC32_OUT |
| 핀 10 | VSS — Digital ground |
| 핀 11 | VDD — Digital supply 1.62-3.6 V |
| 핀 12 | OSC_IN — HSE oscillator input |
| 핀 13 | OSC_OUT — HSE oscillator output |
| 핀 14 | NRST — Reset input, active low |
| 핀 15 | PC0 — GPIO PC0 / ADC1_INP10 |
| 핀 16 | PC1 — GPIO PC1 / ADC1_INP11 |
| 핀 17 | PC2 — GPIO PC2 / ADC1_INP12 |
| 핀 18 | PC3 — GPIO PC3 / ADC1_INP13 |
| 핀 19 | VSSA — Analog ground |
| 핀 20 | VDDA — Analog supply |
| 핀 21 | PA0 — GPIO PA0 / ADC1_INP0 / WKUP0 |
| 핀 22 | PA1 — GPIO PA1 / ADC1_INP1 |
| 핀 23 | PA2 — GPIO PA2 / ADC1_INP2 / USART2_TX |
| 핀 24 | PA3 — GPIO PA3 / ADC1_INP3 / USART2_RX |
| 핀 25 | VSS — Digital ground |
| 핀 26 | VDD — Digital supply |
| 핀 27 | PA4 — GPIO PA4 / ADC1_INP4 / DAC1_OUT1 |
| 핀 28 | PA5 — GPIO PA5 / ADC1_INP5 / DAC1_OUT2 |
| 핀 29 | PA6 — GPIO PA6 / ADC1_INP6 |
| 핀 30 | PA7 — GPIO PA7 / ADC1_INP7 |
| 핀 31 | PC4 — GPIO PC4 / ADC1_INP14 |
| 핀 32 | PC5 — GPIO PC5 / ADC1_INP15 |
| 핀 33 | PB0 — GPIO PB0 / ADC1_INP8 |
| 핀 34 | PB1 — GPIO PB1 / ADC1_INP9 |
| 핀 35 | PB2 — GPIO PB2 / BOOT1 |
| 핀 36 | PE7 — GPIO PE7 |
| 핀 37 | PE8 — GPIO PE8 |
| 핀 38 | PE9 — GPIO PE9 |
| 핀 39 | PE10 — GPIO PE10 |
| 핀 40 | PE11 — GPIO PE11 |
| 핀 41 | PE12 — GPIO PE12 |
| 핀 42 | PE13 — GPIO PE13 |
| 핀 43 | PE14 — GPIO PE14 |
| 핀 44 | PE15 — GPIO PE15 |
| 핀 45 | PB10 — GPIO PB10 / USART3_TX |
| 핀 46 | PB11 — GPIO PB11 / USART3_RX |
| 핀 47 | VCAP_1 — VCORE decoupling (internal SMPS output cap) |
| 핀 48 | VDD — Digital supply |
| 핀 49 | PB12 — GPIO PB12 / SPI2_NSS |
| 핀 50 | PB13 — GPIO PB13 / SPI2_SCK |
| 핀 51 | PB14 — GPIO PB14 / SPI2_MISO |
| 핀 52 | PB15 — GPIO PB15 / SPI2_MOSI |
| 핀 53 | PD8 — GPIO PD8 / USART3_TX |
| 핀 54 | PD9 — GPIO PD9 / USART3_RX |
| 핀 55 | PD10 — GPIO PD10 |
| 핀 56 | PD11 — GPIO PD11 |
| 핀 57 | PD12 — GPIO PD12 |
| 핀 58 | PD13 — GPIO PD13 |
| 핀 59 | PD14 — GPIO PD14 |
| 핀 60 | PD15 — GPIO PD15 |
| 핀 61 | PC6 — GPIO PC6 / USART6_TX |
| 핀 62 | PC7 — GPIO PC7 / USART6_RX |
| 핀 63 | PC8 — GPIO PC8 |
| 핀 64 | PC9 — GPIO PC9 |
| 핀 65 | PA8 — GPIO PA8 / TIM1_CH1 / MCO1 |
| 핀 66 | PA9 — GPIO PA9 / USART1_TX |
| 핀 67 | PA10 — GPIO PA10 / USART1_RX |
| 핀 68 | PA11 — GPIO PA11 / USB_OTG_FS_DM |
| 핀 69 | PA12 — GPIO PA12 / USB_OTG_FS_DP |
| 핀 70 | PA13 — GPIO PA13 / SWDIO |
| 핀 71 | VCAP_2 — VCORE decoupling |
| 핀 72 | VDD — Digital supply |
| 핀 73 | PA14 — GPIO PA14 / SWCLK |
| 핀 74 | PA15 — GPIO PA15 / JTDI / TIM2_CH1 |
| 핀 75 | PC10 — GPIO PC10 / UART4_TX / SDMMC2_D2 |
| 핀 76 | PC11 — GPIO PC11 / UART4_RX / SDMMC2_D3 |
| 핀 77 | PC12 — GPIO PC12 / UART5_TX / SDMMC2_CK |
| 핀 78 | PD0 — GPIO PD0 / FMC_D2 |
| 핀 79 | PD1 — GPIO PD1 / FMC_D3 |
| 핀 80 | PD2 — GPIO PD2 / SDMMC1_CMD / UART5_RX |
| 핀 81 | PD3 — GPIO PD3 / FMC_CLK |
| 핀 82 | PD4 — GPIO PD4 / FMC_NOE |
| 핀 83 | PD5 — GPIO PD5 / FMC_NWE |
| 핀 84 | VSS — Digital ground |
| 핀 85 | VDD — Digital supply |
| 핀 86 | PD6 — GPIO PD6 / FMC_NWAIT |
| 핀 87 | PD7 — GPIO PD7 / FMC_NE1 |
| 핀 88 | PG9 — GPIO PG9 / USART6_RX |
| 핀 89 | PG10 — GPIO PG10 |
| 핀 90 | PG11 — GPIO PG11 |
| 핀 91 | PG12 — GPIO PG12 |
| 핀 92 | PG13 — GPIO PG13 |
| 핀 93 | PG14 — GPIO PG14 |
| 핀 94 | VSS — Digital ground |
| 핀 95 | VDD — Digital supply |
| 핀 96 | PG15 — GPIO PG15 |
| 핀 97 | PB3 — GPIO PB3 / JTDO / TIM2_CH2 |
| 핀 98 | PB4 — GPIO PB4 / NJTRST |
| 핀 99 | PB5 — GPIO PB5 / I2C1_SMBAI |
| 핀 100 | PB6 — GPIO PB6 / I2C1_SCL |
| 핀 101 | PB7 — GPIO PB7 / I2C1_SDA |
| 핀 102 | BOOT0 — Boot mode select |
| 핀 103 | PB8 — GPIO PB8 / I2C1_SCL |
| 핀 104 | PB9 — GPIO PB9 / I2C1_SDA |
| 핀 105 | PE0 — GPIO PE0 / TIM4_ETR |
| 핀 106 | PE1 — GPIO PE1 |
| 핀 107 | VSS — Digital ground |
| 핀 108 | VDD — Digital supply |
| 핀 109 | PF0 — GPIO PF0 / FMC_A0 |
| 핀 110 | PF1 — GPIO PF1 / FMC_A1 |
| 핀 111 | PF2 — GPIO PF2 / FMC_A2 |
| 핀 112 | PF3 — GPIO PF3 / FMC_A3 |
| 핀 113 | PF4 — GPIO PF4 / FMC_A4 |
| 핀 114 | PF5 — GPIO PF5 / FMC_A5 |
| 핀 115 | VSS — Digital ground |
| 핀 116 | VDD — Digital supply |
| 핀 117 | PF6 — GPIO PF6 / TIM10_CH1 |
| 핀 118 | PF7 — GPIO PF7 / TIM11_CH1 |
| 핀 119 | PF8 — GPIO PF8 / TIM12_CH1 |
| 핀 120 | PF9 — GPIO PF9 / TIM13_CH1 |
| 핀 121 | PF10 — GPIO PF10 / TIM14_CH1 |
| 핀 122 | PF11 — GPIO PF11 |
| 핀 123 | PH0 — GPIO PH0 / OSC_IN |
| 핀 124 | PH1 — GPIO PH1 / OSC_OUT |
| 핀 125 | VSS — Digital ground |
| 핀 126 | VDD — Digital supply |
| 핀 127 | PC14 — GPIO PC14 / OSC32_IN (duplicate alt) |
| 핀 128 | PC15 — GPIO PC15 / OSC32_OUT (duplicate alt) |
| 핀 129 | VSS — Digital ground |
| 핀 130 | VDD — Digital supply |
| 핀 131 | PG0 — GPIO PG0 / FMC_A10 |
| 핀 132 | PG1 — GPIO PG1 / FMC_A11 |
| 핀 133 | PG2 — GPIO PG2 / FMC_A12 |
| 핀 134 | PG3 — GPIO PG3 / FMC_A13 |
| 핀 135 | PG4 — GPIO PG4 / FMC_A14 |
| 핀 136 | PG5 — GPIO PG5 / FMC_A15 |
| 핀 137 | PG6 — GPIO PG6 |
| 핀 138 | PG7 — GPIO PG7 |
| 핀 139 | PG8 — GPIO PG8 |
| 핀 140 | VSS — Digital ground |
| 핀 141 | VDD — Digital supply |
| 핀 142 | PF12 — GPIO PF12 / FMC_A6 |
| 핀 143 | PF13 — GPIO PF13 / FMC_A7 |
| 핀 144 | PF14 — GPIO PF14 / FMC_A8 |
| 핀 145 | PF15 — GPIO PF15 / FMC_A9 |
| 핀 146 | PG10 — GPIO PG10 (duplicate function) |
| 핀 147 | PA0 — GPIO PA0 (WKUP, alt) |
| 핀 148 | PA1 — GPIO PA1 (alt) |
| 핀 149 | PA2 — GPIO PA2 (alt) |
| 핀 150 | PA3 — GPIO PA3 (alt) |
| 핀 151 | VSS — Digital ground |
| 핀 152 | VDD — Digital supply |
| 핀 153 | PA4 — GPIO PA4 (alt) |
| 핀 154 | PA5 — GPIO PA5 (alt) |
| 핀 155 | PA6 — GPIO PA6 (alt) |
| 핀 156 | PA7 — GPIO PA7 (alt) |
| 핀 157 | PB0 — GPIO PB0 (alt) |
| 핀 158 | PB1 — GPIO PB1 (alt) |
| 핀 159 | PB2 — GPIO PB2 (alt) |
| 핀 160 | PF12 — GPIO PF12 (alt) |
| 핀 161 | VSS — Digital ground |
| 핀 162 | VDD — Digital supply |
| 핀 163 | PC6 — GPIO PC6 (alt) |
| 핀 164 | PC7 — GPIO PC7 (alt) |
| 핀 165 | PC8 — GPIO PC8 (alt) |
| 핀 166 | PC9 — GPIO PC9 (alt) |
| 핀 167 | PA8 — GPIO PA8 (alt) |
| 핀 168 | PA9 — GPIO PA9 (alt) |
| 핀 169 | PA10 — GPIO PA10 (alt) |
| 핀 170 | PA11 — GPIO PA11 (alt) |
| 핀 171 | PA12 — GPIO PA12 (alt) |
| 핀 172 | PA13 — GPIO PA13 (alt) |
| 핀 173 | VCAP_3 — VCORE decoupling |
| 핀 174 | VDD — Digital supply |
| 핀 175 | PA14 — GPIO PA14 (alt) |
| 핀 176 | PA15 — GPIO PA15 (alt) |
일반적인 애플리케이션
STM32H743IGT6 적합 용도: 7 애플리케이션s: Industrial Motor Control (FOC / PMSM), High-End TFT-LCD HMI Panels, Multi-Axis Robotics and CNC Control, Audio Processing and MIDI Synthesizers, Machine Vision and Image Processing, Drone Flight Controllers, Portable Medical Instrumentation.
Industrial Motor Control (FOC / PMSM)
The STM32H743IGT6 is engineered for high-performance motor control including field-oriented control (FOC) of PMSM and BLDC motors. The 480 MHz Cortex-M7 with double-precision FPU executes the FOC loop in well under 10 microseconds, and the 3x 12-bit ADCs at 3.6 MSPS provide simultaneous current sampling on three shunt resistors without aliasing. The high-resolution timer (HRTIM) with 184 ps resolution drives center-aligned PWM up to 100 kHz. The built-in SMPS reduces BOM cost versus an external LDO, and the cryptographic accelerators are not required for motor-control firmware, making the H743 a cost-optimized choice versus the H753.
추천
High-End TFT-LCD HMI Panels
The STM32H743IGT6 drives TFT-LCD panels up to XGA (1024x768) using the integrated LTDC controller, Chrom-ART (DMA2D) 2D accelerator, and on-chip JPEG codec. The 1 MB of AXI SRAM holds a full XGA framebuffer at 16 bpp without external SDRAM, and the 16-bit parallel display interface supports pixel clocks up to 83 MHz for 60 fps refresh. The double-precision FPU accelerates anti-aliased font rendering, and the SDMMC controller boots firmware from a microSD card at 50 MB/s. For HMI panels in industrial equipment, the H743 is widely adopted as the cost-effective sweet spot between the Cortex-M4 STM32F4 line and the more expensive STM32MP1 microprocessor series.
추천
Multi-Axis Robotics and CNC Control
The STM32H743IGT6's 480 MHz Cortex-M7 core is well suited to multi-axis robotics including 6-DoF robotic arms, CNC controllers, and pick-and-place machines. The DSP extensions accelerate inverse-kinematics math, the double-precision FPU handles 3D coordinate transforms, and the 16-bit parallel camera interface accepts a vision module for closed-loop position control. With 140 GPIO and 8 USART/UART ports, the H743 can drive up to 8 stepper motors via external drivers, and the 2x CAN interfaces support CANopen or CAN-FD for industrial robot bus protocols. The 1 MB Flash accommodates complex motion-planning firmware without external memory.
추천
Audio Processing and MIDI Synthesizers
The STM32H743IGT6's 480 MHz Cortex-M7 with double-precision FPU executes high-quality audio processing including 32-voice polyphonic synthesizers, reverb, and effects at 48 kHz/24-bit. The SAI (Serial Audio Interface) supports I2S/TDM audio codecs up to 192 kHz, the 2x 12-bit DACs provide line-level analog output, and the I2C peripheral controls codec chips. The DSP extensions accelerate FFT-based spectral processing, and the 1 MB SRAM holds multi-second audio buffers without external memory. The 176-LQFP package provides ample GPIO for MIDI DIN-5 in/out and footswitch jacks.
추천
Machine Vision and Image Processing
The STM32H743IGT6 supports machine-vision edge nodes with its 16-bit parallel camera interface, hardware JPEG codec, and Chrom-ART (DMA2D) graphics accelerator. The 1 MB of SRAM accommodates a VGA-resolution framebuffer plus edge-detection kernels, and the AXI bus matrix sustains 240 MHz memory bandwidth to keep up with OV5640-class 5 MP sensors. The Cortex-M7 DSP extensions accelerate Sobel and Canny edge-detection filters, while the USB 2.0 OTG streams processed frames to a host. For embedded vision tasks below 30 fps at QVGA, the H743 is competitive with low-end Cortex-A Linux SOMs at much lower power and BOM cost.
추천
Drone Flight Controllers
The STM32H743IGT6 has become the de-facto flight-controller reference MCU for high-end racing and cinematic drones running PX4 or ArduPilot. The 480 MHz Cortex-M7 runs the attitude-control loop at 8 kHz, the double-precision FPU handles quaternion math, and the high-resolution timer drives DSHOT/OneShot/ProShot ESC protocols. The 3x ADCs at 3.6 MSPS sample IMU and gyroscope data with low latency, and the USB OTG provides the bootloader for firmware updates. The internal SMPS reduces weight versus an external LDO, and the 176-LQFP package has enough GPIO for GPS, magnetometer, optical-flow, and 4x ESC outputs simultaneously.
추천
Portable Medical Instrumentation
The STM32H743IGT6 suits portable medical devices such as patient monitors, infusion pumps, and handheld ultrasound controllers. The 480 MHz Cortex-M7 processes ECG/EEG signal chains, the 3x 12-bit ADCs at 3.6 MSPS provide adequate resolution for biopotential signals, and the AES-256 hardware accelerator (not available on H743 - see H753) secures patient data at rest. The 1 MB Flash stores firmware with built-in self-test (BIST) routines, and the USB OTG connects to PC-based diagnostic software. The -40C to +85C operating temperature range supports both clinical and field-deployment scenarios.
추천
추천 제품 요약
엔지니어링 참조 데이터: STM32H743IGT6 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | STM32H753IGT6 | STM32H750IBT6 | STM32H742IGT6 | STM32H733VGT6 | STM32H735IGT6 |
|---|---|---|---|---|---|---|
| Package | 176-LQFP (24x24 mm) | 176-LQFP (24x24) - same | 176-LQFP (24x24) - same | 176-LQFP (24x24) - same | 176-LQFP (24x24) - same | 176-LQFP (24x24) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | Cortex-M7 @ 480 MHz | Cortex-M7 @ 480 MHz | Cortex-M7 @ 480 MHz | Cortex-M7 @ 480 MHz | Cortex-M7 @ 550 MHz | Cortex-M7 @ 550 MHz |
| Flash | 1 MB dual-bank | 2 MB dual-bank | 128 KB (boot from external) | 1 MB dual-bank | 1 MB dual-bank | 1 MB dual-bank |
| SRAM | 1 MB | 1 MB | 864 KB | 1 MB | 564 KB | 564 KB |
| Cryptography | No crypto accelerator | AES, hash, TRNG, SFI | AES, hash, TRNG | No crypto | AES, hash, TRNG | AES, hash, TRNG |
| TrustZone | No | No | No | No | Yes | Yes |
| Internal SMPS | Yes | Yes | Yes | Yes | Yes | Yes |
| Approx Unit Price (qty 1, USD) | 16.20 | 19.50 | 12.80 | 15.40 | 17.60 | 18.90 |
주요 차별점
- Industry-leading 480 MHz Cortex-M7 with 2400 CoreMark (vs STM32F407VGT6)
- 1 MB Flash and 1 MB SRAM in a single chip (vs STM32H750IBT6)
- Cost-optimized without crypto accelerator (vs STM32H753IGT6)
- No TrustZone - simpler firmware toolchain (vs STM32H733VGT6)
설계 노트
The STM32H743IGT6 integrates a step-down SMPS to supply VCORE from VDD. According to the ST reference design (AN5031), connect a 4.7 uH inductor between VCORE and the SMPS output pin, plus a 4.7 uF X5R 6.3V ceramic capacitor on each VCAP pin. This configuration typically reduces core current by 30% versus external-LDO supply. If the application is noise-sensitive (audio or ADC), consider bypassing the SMPS and using the internal LDO mode by tying the SMPS_EN pin appropriately.
Place 100 nF X7R 0402 decoupling capacitors within 2 mm of every VDD/VDDA pin, with a shared 10 uF bulk capacitor at the board entry point. The 480 MHz AXI bus requires trace-length matching within 0.5 mm on SDRAM, FMC, and Ethernet RMII lines. Use a 4-layer PCB stackup with dedicated ground and power planes; the LQFP-176 thermal pad (exposed) must be soldered to a copper pour of at least 1 square inch to keep theta_JA below 38 C/W.
Do not skip the BOOT0 strap configuration: pull BOOT0 low via 10 kOhm to VSS for normal boot from internal Flash, or high to VDD for system memory bootloader (used for UART/USB firmware recovery). Configure the unused GPIO banks (especially PG0-PG8 on LQFP-176) to analog input mode to reduce standby current by 5-10 uA per pin. Ensure NRST has a 10 kOhm pull-up and 100 nF capacitor to guarantee clean reset during power ramp.
The Ethernet RMII interface requires 50 MHz reference clock with sub-100 ps jitter; source this clock from the MCU MCO1 or MCO2 output rather than an external oscillator to save BOM cost. For SDRAM, the DQS signal must be length-matched to the data/clock group within 1 mm on a 4-layer PCB. The USB OTG FS D+/D- pair requires 90 ohm differential impedance; do not route over ground-plane splits.
규정 준수 정보
Industrial-grade part (-40C to +85C) per ST datasheet DS12110. Not AEC-Q100 qualified - use STM32H743IIT6Q for automotive. RoHS/REACH compliant per ST product page.
