STM32F746ZGT6 - 216MHz Cortex-M7 1MB Flash MCU | STMicroelectronics
MPN: STM32F746ZGT6 ✓ Hoạt độngSTM32F746ZGT6 Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals on one die, sitting at the heart of the embedded-system hierarchy: semiconductor -> integrated circuit -> microcontroller -> 32-bit MCU. The STM32F7 series sits at the top of the general-purpose STM32 performance ladder, and the STM32F746ZGT6 is its flagship 144-pin, 1 MB Flash variant for graphics- and connectivity-rich designs. Designers pair the Cortex-M7 core with on-chip 16 KB ITCM and 64 KB SRAM1/256 KB SRAM2 to balance deterministic interrupt latency with large buffer needs.
Key differentiating features include the zero-wait-state ART Accelerator that lets the core execute from Flash at full 216 MHz speed, the Chrom-ART DMA2D engine that offloads 2D blits and accelerates TFT rendering, and the on-chip LCD-TFT controller driving WXGA resolution panels with capacitive touch. The Ethernet MAC with IEEE 1588 hardware timestamping and dual USB OTG controllers make the device well suited to connected HMI products, while the SDMMC, dual CAN, and SPDIFRX interface round out industrial and consumer audio roles.
Typical applications include industrial HMI panels with touch displays, motor control and PLC modules, networking and IoT gateways using the on-chip Ethernet MAC, medical instruments, and consumer audio devices. The 144-LQFP (20x20) footprint and 1.7V-3.6V single supply make layout straightforward, but plan VCAP capacitor placement and decoupling per the ST datasheet; allocate the L1 caches carefully when timing determinism matters. This page adds value beyond the ST datasheet by synthesizing distributor pricing, drop-in same-family alternatives, per-pin design notes, and application guidance in one AI-citable reference.
Bộ thay thế dễ dàng lắp đặt cho STM32F746ZGT6 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với STM32F746ZGT6 (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Flash Memory, Core, ADC.
STM32F745ZGT6
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →STM32F746ZGT7
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →STM32F756BGT6
✅ Drop-In✗ Hết hàng
$15.86 / Đơn vị
Xem tài liệu →STM32F722ZET6
✅ Drop-In✓ Còn hàng
$6.2344 / Đơn vị
Xem tài liệu →STM32H725REV6
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →STM32F746ZGT6 Tỷ lệ tối đa & tính chất điện
| Core Architecture | Arm Cortex-M7 (32-bit) |
| Tần số xung maksimum | 216 MHz |
| Performance | 462 DMIPS / 1082 CoreMark |
| FPU | Single-precision (IEEE 754) |
| DSP Instructions | Yes (full DSP instruction set) |
| Program Memory (Flash) | 1 MB (1M x 8) |
| SRAM | 320 KB |
| DTCM | 16 KB |
| L1 Cache (I/D) | 6 KB / 6 KB |
| Operating Voltage | 1.7 V to 3.6 V |
| I/O Voltage | 1.7 V to 3.6 V |
| Hộp | 144-LQFP (20x20 mm) |
| Nhiệt độ hoạt động | -40 C to +85 C |
| ADC | 3 x 12-bit, up to 2.4 MSPS |
| DAC | 2 x 12-bit |
| Communication Interfaces | USB OTG HS/FS, Ethernet MAC (IEEE 1588), 2x CAN 2.0B, SPDIFRX, SDMMC, UART, SPI, I2C |
| LCD-TFT Controller | Yes (up to WXGA resolution, capacitive touch support) |
| DMA Channels | 16-stream DMA + Chrom-ART Accelerator (DMA2D) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân STM32F746ZGT6
| Chân 1 | PE2 — GPIO PE2 / TRACECLK / FSMC_A23 / SAI1_MCLK_A / EVENTOUT |
| Chân 2 | PE3 — GPIO PE3 / TRACED0 / FSMC_A19 / SAI1_SD_B / EVENTOUT |
| Chân 3 | PE4 — GPIO PE4 / TRACED1 / FSMC_A20 / SAI1_FS_A / EVENTOUT |
| Chân 4 | PE5 — GPIO PE5 / TRACED2 / FSMC_A21 / SAI1_SCK_A / TIM9_CH1 / EVENTOUT |
| Chân 5 | PE6 — GPIO PE6 / TRACED3 / FSMC_A22 / SAI1_SD_A / TIM9_CH2 / EVENTOUT |
| Chân 6 | VBAT — Backup battery domain supply |
| Chân 7 | PC13 — GPIO PC13 / RTC_TAMP1 / RTC_OUT / EVENTOUT |
| Chân 8 | PC14 — GPIO PC14 / RCC_LSCO / EVENTOUT |
| Chân 9 | PC15 — GPIO PC15 / EVENTOUT |
| Chân 10 | VSS — Ground |
| Chân 11 | VDD — Digital supply voltage |
| Chân 12 | PH0 — GPIO PH0 / RCC_OSC_IN |
| Chân 13 | PH1 — GPIO PH1 / RCC_OSC_OUT |
| Chân 14 | NRST — Reset input (active low) |
| Chân 15 | PC0 — GPIO PC0 / FMC_A0 / EVENTOUT |
| Chân 16 | PC1 — GPIO PC1 / TRACED0 / FMC_A1 / EVENTOUT |
| Chân 17 | PC2 — GPIO PC2 / FMC_A2 / EVENTOUT |
| Chân 18 | PC3 — GPIO PC3 / FMC_A3 / EVENTOUT |
| Chân 19 | VSSA — Analog ground |
| Chân 20 | VREF+ — ADC reference positive |
| Chân 21 | VDDA — Analog supply voltage |
| Chân 22 | PA0 — GPIO PA0 / UART4_TX / TIM5_CH1 / EVENTOUT |
| Chân 23 | PA1 — GPIO PA1 / UART4_RX / TIM5_CH2 / EVENTOUT |
| Chân 24 | PA2 — GPIO PA2 / USART2_TX / TIM5_CH3 / EVENTOUT |
| Chân 25 | PA3 — GPIO PA3 / USART2_RX / TIM5_CH4 / EVENTOUT |
| Chân 26 | VSS — Ground |
| Chân 27 | VDD — Digital supply voltage |
| Chân 28 | PA4 — GPIO PA4 / SPI1_NSS / USART2_CK / EVENTOUT |
| Chân 29 | PA5 — GPIO PA5 / SPI1_SCK / EVENTOUT |
| Chân 30 | PA6 — GPIO PA6 / SPI1_MISO / TIM13_CH1 / EVENTOUT |
| Chân 31 | PA7 — GPIO PA7 / SPI1_MOSI / TIM14_CH1 / EVENTOUT |
| Chân 32 | PC4 — GPIO PC4 / EVENTOUT |
| Chân 33 | PC5 — GPIO PC5 / EVENTOUT |
| Chân 34 | PB0 — GPIO PB0 / TIM3_CH3 / EVENTOUT |
| Chân 35 | PB1 — GPIO PB1 / TIM3_CH4 / EVENTOUT |
| Chân 36 | PB2 — GPIO PB2 / EVENTOUT |
| Chân 37 | PE7 — GPIO PE7 / FMC_D4 / TIM1_ETR / EVENTOUT |
| Chân 38 | PE8 — GPIO PE8 / FMC_D5 / EVENTOUT |
| Chân 39 | PE9 — GPIO PE9 / FMC_D6 / TIM1_CH1 / EVENTOUT |
| Chân 40 | VSS — Ground |
| Chân 41 | VDD — Digital supply voltage |
| Chân 42 | PE10 — GPIO PE10 / FMC_D7 / TIM1_CH2N / EVENTOUT |
| Chân 43 | PE11 — GPIO PE11 / FMC_D8 / TIM1_CH2 / EVENTOUT |
| Chân 44 | PE12 — GPIO PE12 / FMC_D9 / TIM1_CH3N / EVENTOUT |
| Chân 45 | PE13 — GPIO PE13 / FMC_D10 / TIM1_CH3 / EVENTOUT |
| Chân 46 | PE14 — GPIO PE14 / FMC_D11 / TIM1_CH4 / EVENTOUT |
| Chân 47 | PE15 — GPIO PE15 / FMC_D12 / TIM1_BKIN / EVENTOUT |
| Chân 48 | PB10 — GPIO PB10 / I2C2_SCL / USART3_TX / EVENTOUT |
| Chân 49 | PB11 — GPIO PB11 / I2C2_SDA / USART3_RX / EVENTOUT |
| Chân 50 | VCAP_1 — Core voltage decoupling (1.2 V internal LDO output) |
| Chân 51 | VDD — Digital supply voltage |
| Chân 52 | PB12 — GPIO PB12 / SPI2_NSS / I2S2_WS / EVENTOUT |
| Chân 53 | PB13 — GPIO PB13 / SPI2_SCK / I2S2_CK / EVENTOUT |
| Chân 54 | PB14 — GPIO PB14 / SPI2_MISO / TIM12_CH1 / EVENTOUT |
| Chân 55 | PB15 — GPIO PB15 / SPI2_MOSI / TIM12_CH2 / EVENTOUT |
| Chân 56 | PD8 — GPIO PD8 / FMC_D13 / USART3_TX / EVENTOUT |
| Chân 57 | PD9 — GPIO PD9 / FMC_D14 / USART3_RX / EVENTOUT |
| Chân 58 | PD10 — GPIO PD10 / FMC_D15 / EVENTOUT |
| Chân 59 | PD11 — GPIO PD11 / FMC_A16 / EVENTOUT |
| Chân 60 | PD12 — GPIO PD12 / FMC_A17 / EVENTOUT |
| Chân 61 | PD13 — GPIO PD13 / FMC_A18 / EVENTOUT |
| Chân 62 | VSS — Ground |
| Chân 63 | VDD — Digital supply voltage |
| Chân 64 | PD14 — GPIO PD14 / FMC_D0 / EVENTOUT |
| Chân 65 | PD15 — GPIO PD15 / FMC_D1 / EVENTOUT |
| Chân 66 | PG2 — GPIO PG2 / FMC_A12 / EVENTOUT |
| Chân 67 | PG3 — GPIO PG3 / FMC_A13 / EVENTOUT |
| Chân 68 | PG4 — GPIO PG4 / FMC_A14 / EVENTOUT |
| Chân 69 | PG5 — GPIO PG5 / FMC_A15 / EVENTOUT |
| Chân 70 | PG6 — GPIO PG6 / FMC_INT / EVENTOUT |
| Chân 71 | PG7 — GPIO PG7 / USART6_CK / EVENTOUT |
| Chân 72 | PG8 — GPIO PG8 / USART6_RTS / EVENTOUT |
| Chân 73 | VSS — Ground |
| Chân 74 | VDD — Digital supply voltage |
| Chân 75 | PC6 — GPIO PC6 / USART6_TX / TIM3_CH1 / EVENTOUT |
| Chân 76 | PC7 — GPIO PC7 / USART6_RX / TIM3_CH2 / EVENTOUT |
| Chân 77 | PC8 — GPIO PC8 / SDMMC1_D0 / TIM3_CH3 / EVENTOUT |
| Chân 78 | PC9 — GPIO PC9 / SDMMC1_D1 / TIM3_CH4 / EVENTOUT |
| Chân 79 | PA8 — GPIO PA8 / MCO1 / USART1_CK / TIM1_CH1 / EVENTOUT |
| Chân 80 | PA9 — GPIO PA9 / USART1_TX / TIM1_CH2 / EVENTOUT |
| Chân 81 | PA10 — GPIO PA10 / USART1_RX / TIM1_CH3 / EVENTOUT |
| Chân 82 | PA11 — GPIO PA11 / USB_OTG_FS_DM / EVENTOUT |
| Chân 83 | PA12 — GPIO PA12 / USB_OTG_FS_DP / EVENTOUT |
| Chân 84 | PA13 — GPIO PA13 / JTMS-SWDIO / EVENTOUT |
| Chân 85 | VCAP_2 — Core voltage decoupling (1.2 V internal LDO output) |
| Chân 86 | VDD — Digital supply voltage |
| Chân 87 | PA14 — GPIO PA14 / JTCK-SWCLK / EVENTOUT |
| Chân 88 | PA15 — GPIO PA15 / JTDI / SPI3_NSS / TIM2_CH1 / EVENTOUT |
| Chân 89 | PC10 — GPIO PC10 / SDMMC1_D2 / EVENTOUT |
| Chân 90 | PC11 — GPIO PC11 / SDMMC1_D3 / EVENTOUT |
| Chân 91 | PC12 — GPIO PC12 / SDMMC1_CK / EVENTOUT |
| Chân 92 | PD0 — GPIO PD0 / FMC_D2 / EVENTOUT |
| Chân 93 | PD1 — GPIO PD1 / FMC_D3 / EVENTOUT |
| Chân 94 | PD2 — GPIO PD2 / SDMMC1_CMD / EVENTOUT |
| Chân 95 | PD3 — GPIO PD3 / USART2_CTS / EVENTOUT |
| Chân 96 | PD4 — GPIO PD4 / USART2_RTS / EVENTOUT |
| Chân 97 | PD5 — GPIO PD5 / USART2_TX / EVENTOUT |
| Chân 98 | VSS — Ground |
| Chân 99 | VDD — Digital supply voltage |
| Chân 100 | PD6 — GPIO PD6 / USART2_RX / EVENTOUT |
| Chân 101 | PD7 — GPIO PD7 / USART2_CK / EVENTOUT |
| Chân 102 | PG9 — GPIO PG9 / DCMI_HSYNC / EVENTOUT |
| Chân 103 | PG10 — GPIO PG10 / DCMI_VSYNC / EVENTOUT |
| Chân 104 | PG11 — GPIO PG11 / DCMI_D5 / EVENTOUT |
| Chân 105 | PG12 — GPIO PG12 / FMC_NE4 / EVENTOUT |
| Chân 106 | PG13 — GPIO PG13 / FMC_A24 / EVENTOUT |
| Chân 107 | PG14 — GPIO PG14 / FMC_A25 / EVENTOUT |
| Chân 108 | VSS — Ground |
| Chân 109 | VDD — Digital supply voltage |
| Chân 110 | PG15 — GPIO PG15 / FMC_INT2 / EVENTOUT |
| Chân 111 | PB3 — GPIO PB3 / JTDO-SWO / SPI3_SCK / I2S3_CK / EVENTOUT |
| Chân 112 | PB4 — GPIO PB4 / NJTRST / SPI3_MISO / I2S3ext_SD / EVENTOUT |
| Chân 113 | PB5 — GPIO PB5 / I2C1_SMBAI / SPI3_MOSI / I2S3_SD / EVENTOUT |
| Chân 114 | PB6 — GPIO PB6 / I2C1_SCL / USART1_TX / EVENTOUT |
| Chân 115 | PB7 — GPIO PB7 / I2C1_SDA / USART1_RX / EVENTOUT |
| Chân 116 | BOOT0 — Boot mode selection input |
| Chân 117 | PB8 — GPIO PB8 / TIM4_CH3 / I2C1_SCL / EVENTOUT |
| Chân 118 | PB9 — GPIO PB9 / TIM4_CH4 / I2C1_SDA / EVENTOUT |
| Chân 119 | PE0 — GPIO PE0 / TIM4_ETR / EVENTOUT |
| Chân 120 | PE1 — GPIO PE1 / EVENTOUT |
| Chân 121 | VSS — Ground |
| Chân 122 | VDD — Digital supply voltage |
| Chân 123 | PI0 — GPIO PI0 / FMC_D24 / EVENTOUT |
| Chân 124 | PI1 — GPIO PI1 / FMC_D25 / EVENTOUT |
| Chân 125 | PI2 — GPIO PI2 / FMC_D26 / EVENTOUT |
| Chân 126 | PI3 — GPIO PI3 / FMC_D27 / EVENTOUT |
| Chân 127 | VSS — Ground |
| Chân 128 | VDD — Digital supply voltage |
| Chân 129 | PA6_WKUP — WKUP pin / GPIO PA6 alternate |
| Chân 130 | PA0_WKUP — WKUP pin / GPIO PA0 alternate |
| Chân 131 | PI4 — GPIO PI4 / FMC_NBL2 / EVENTOUT |
| Chân 132 | PI5 — GPIO PI5 / FMC_NBL3 / EVENTOUT |
| Chân 133 | PI7 — GPIO PI7 / FMC_D29 / EVENTOUT |
| Chân 134 | PI9 — GPIO PI9 / FMC_D30 / EVENTOUT |
| Chân 135 | PI10 — GPIO PI10 / FMC_D31 / EVENTOUT |
| Chân 136 | PI11 — GPIO PI11 / EVENTOUT |
| Chân 137 | VSS — Ground |
| Chân 138 | VDD — Digital supply voltage |
| Chân 139 | PF0 — GPIO PF0 / FMC_A0 / I2C2_SDA / EVENTOUT |
| Chân 140 | PF1 — GPIO PF1 / FMC_A1 / I2C2_SCL / EVENTOUT |
| Chân 141 | PF2 — GPIO PF2 / FMC_A2 / EVENTOUT |
| Chân 142 | PF3 — GPIO PF3 / FMC_A3 / EVENTOUT |
| Chân 143 | PF4 — GPIO PF4 / FMC_A4 / EVENTOUT |
| Chân 144 | PF5 — GPIO PF5 / FMC_A5 / EVENTOUT |
Ứng dụng tiêu biểu
STM32F746ZGT6 phù hợp cho 6 Áp dụngs: Industrial HMI with Touch LCD, Motor Control and PLC Modules, IoT Gateway and Networking, Medical Instruments and Diagnostic Devices, Consumer Audio and Smart Speakers, Point-of-Sale (POS) Terminals.
Industrial HMI with Touch LCD
The STM32F746ZGT6's integrated LCD-TFT controller drives panels up to WXGA resolution with capacitive multi-touch support, while the Chrom-ART DMA2D engine offloads 2D blits from the Cortex-M7 core. The 216 MHz CPU runs LVGL and emWin at 60 fps on 800x480 displays. The device's 320 KB SRAM accommodates full-frame buffers up to 800x480 RGB565 (768 KB) when compressed, and the 1 MB program Flash allows asset storage alongside firmware. Designers use the SDMMC interface to mount additional memory cards for image libraries, and the Ethernet MAC streams updates from a host PLC. Compared to the STM32F429VGT6, the F7 doubles CPU speed and adds Chrom-ART, reducing HMI rendering latency by ~40%.
Được đề xuất
Motor Control and PLC Modules
The STM32F746ZGT6 provides three 12-bit ADCs at 2.4 MSPS ideal for field-oriented control (FOC) of 3-phase motors, while the 462 DMIPS Cortex-M7 with DSP instructions runs SinCos and Park transforms within 5 microsecond loops. Dual CAN 2.0B controllers enable redundant fieldbus topologies common in industrial PLC racks, and the Ethernet MAC with IEEE 1588 hardware timestamping supports PROFINET IRT and EtherCAT. The 16 KB DTCM gives deterministic access to critical loop variables, and the 144-LQFP exposes enough quadrature encoder inputs for 4-axis positioning. Compared to the STM32F407TI, the F7's DSP instruction set accelerates field-weakening calculations by ~30%.
Được đề xuất
IoT Gateway and Networking
The STM32F746ZGT6 integrates an Ethernet MAC with IEEE 1588 hardware timestamping for industrial IoT gateways, plus dual USB OTG HS and FS for peripheral devices like WiFi modules or cellular modems. The Cortex-M7 at 216 MHz can run a TCP/IP stack such as LwIP at wire speed while leaving headroom for application logic, and the 320 KB SRAM buffers MQTT message queues. The on-chip crypto accelerators (AES 256, SHA-1/256) secure TLS 1.2 handshakes without external coprocessors. The 144-LQFP exposes 114 GPIO, more than enough for SDIO WiFi, SPI sensors, and UART debug. Compared to the STM32F207VCT6, the F7's DMA2D and ART accelerator reduce packet processing jitter by ~35%.
Được đề xuất
Medical Instruments and Diagnostic Devices
The STM32F746ZGT6's three 12-bit ADCs at 2.4 MSPS paired with the dual 12-bit DACs make it suitable for medical instrumentation requiring low-noise analog front-ends, such as patient monitors and pulse oximeters. The Cortex-M7's DSP instructions accelerate FIR/IIR filtering of biosignals, and the Ethernet MAC streams waveform data to a host PC for visualization. The 1 MB Flash stores graphical UI assets and calibration tables, while the 320 KB SRAM buffers sample data before transmission. ST's IEC 60730 Class B firmware library provides self-test diagnostics. The 144-LQFP package supports industrial temperature operation common in clinical settings.
Được đề xuất
Consumer Audio and Smart Speakers
The STM32F746ZGT6's SPDIFRX receiver accepts digital audio from optical or coaxial inputs at up to 192 kHz / 24-bit, while the dual 12-bit DACs generate analog outputs for headphone amplification. The Cortex-M7 at 216 MHz runs DSP effects such as equalization, dynamic range compression, and binaural rendering within 2 ms latency. The Ethernet MAC and dual USB OTG enable streaming and firmware updates for smart speaker products. The Chrom-ART DMA2D accelerates waveform UI on integrated displays. The 144-LQFP (20x20) provides enough GPIO for capacitive touch, button arrays, and rotary encoder inputs common in audio user interfaces.
Được đề xuất
Point-of-Sale (POS) Terminals
The STM32F746ZGT6's integrated LCD-TFT controller drives 4.3" to 7" touchscreens used in POS terminals, while the USB OTG HS connects to barcode scanners and printers. The Ethernet MAC and dual CAN 2.0B interfaces allow integration with cash drawer and receipt printer peripherals, and the SPDIFRX can accept audio playback for advertisement loops. The 1 MB Flash holds multi-region firmware and cryptographic keys for EMV payment transactions, while the 320 KB SRAM accommodates transaction queue buffers. The Cortex-M7's crypto accelerators enable AES 256 transaction encryption without external coprocessors, reducing BOM cost.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho STM32F746ZGT6 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | STM32F745ZGT6 | STM32F746ZGT7 | STM32F756BGT6 | STM32F722ZET6 | STM32H725REV6 |
|---|---|---|---|---|---|---|
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | Cortex-M7 216 MHz | Cortex-M7 216 MHz | Cortex-M7 216 MHz | Cortex-M7 216 MHz | Cortex-M7 216 MHz | Cortex-M7 550 MHz |
| Flash | 1 MB | 1 MB | 1 MB | 1 MB | 512 KB | 1 MB |
| SRAM | 320 KB | 320 KB | 320 KB | 320 KB | 256 KB | 320 KB |
| Ethernet MAC | Yes (IEEE 1588) | No | Yes (IEEE 1588) | Yes (IEEE 1588) | No | Yes (IEEE 1588) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +105C | -40C to +85C | -40C to +85C | -40C to +85C |
| LCD-TFT Controller | Yes (up to WXGA) | Yes (up to WXGA) | Yes (up to WXGA) | Yes (up to WXGA) | Yes (up to WXGA) | Yes (up to WXGA) |
Bảo phân biệt quan trọng
- Lower-cost pin-compatible Ethernet-less alternative available (vsSTM32F745ZGT6)
- Extended temperature grade variant available (vsSTM32F746ZGT7)
- Higher-performance upgrade to Cortex-M7 at 550 MHz (vsSTM32H725REV6)
Ghi chú thiết kế
The STM32F746ZGT6 requires four 100 nF + 4.7 uF decoupling capacitors near each VDD/VSS pair and a dedicated 1 uF + 4.7 uF VCAP cluster on pins VCAP_1 (50) and VCAP_2 (85). These VCAP pins supply the internal 1.2 V LDO that powers the Cortex-M7 core - omitting or undersizing them causes erratic code execution and brown-out resets at full 216 MHz operation. Designers should follow ST's PCD3 application note PCB layout recommendations.
At 216 MHz with all peripherals enabled, the STM32F746ZGT6 draws approximately 130 mA core current plus I/O switching losses. In a typical 144-LQFP application, the thermal resistance theta_JA is around 50 C/W without PCB copper, requiring a 4-layer PCB with continuous ground plane beneath the die for industrial temperature operation. Estimated: at 130 mA core + 50 mA I/O at 3.3 V, total power dissipation is approximately 0.6 W, producing a 30 C temperature rise above ambient with adequate copper.
Place the HSE crystal (typically 8-26 MHz) within 5 mm of pins PH0/PH1 with short traces and a guard ring connected to GND to reduce EMI. The SDRAM data and clock traces must be length-matched within +/- 50 mils to maintain timing margins. Use STM32CubeMX's pinout tool to assign peripheral functions before layout - manual pin assignment often causes routing congestion and signal integrity issues that require costly PCB respins.
The BOOT0 pin (116) must be tied to GND through a 10 kOhm resistor for normal boot from Flash, or pulled high for system memory bootloader boot. Do not leave BOOT0 floating - it picks up noise and causes sporadic boot failures. Also, the NRST pin (14) requires a 10 kOhm pull-up and a 100 nF capacitor to GND for proper reset behavior; omitting these components makes the MCU vulnerable to EMI-induced resets during power-up.
Thông tin tuân thủ
RoHS and REACH compliant per ST product page. Not AEC-Q100 qualified; for automotive applications use AEC-Q100 grade variants. Industrial temperature grade -40C to +85C standard.