STM32F746ZGT7 - 216MHz Cortex-M7 1MB Flash MCU | STMicroelectronics
MPN: STM32F746ZGT7 ✓ Hoạt độngSTM32F746ZGT7 Tóm tắt
A microcontroller unit (MCU) is a self-contained computer on a single chip that combines a processor core, program memory (Flash), data memory (SRAM), and configurable peripherals such as timers, serial interfaces, and analog converters. MCUs sit at the heart of embedded systems, bridging the gap between sensors, actuators, and communication networks. The STM32F746ZGT7 belongs to the STM32F7 series, which itself is part of the broader STM32 ARM Cortex-M portfolio and the wider class of 32-bit embedded microcontrollers.
Key features include the 216 MHz Cortex-M7 core with 1082 CoreMark score, 1 MB Flash, 320 KB SRAM (including 64 KB DTCM and 16 KB ITCM), an LCD-TFT controller with Chrom-ART acceleration, Ethernet MAC with IEEE 1588, USB OTG HS/FS, dual CAN, and up to 168 GPIOs. The integrated FPU and DSP extensions allow efficient implementation of motor control, audio processing, and digital filtering algorithms without an external coprocessor.
The device is fabricated on ST's 90 nm embedded Flash process and operates from 1.7 V to 3.6 V, with a flexible power architecture supporting multiple low-power modes down to 1.7 V. The ART Accelerator and L1 cache deliver near-zero-wait-state execution from Flash at 216 MHz, achieving 1082 CoreMark and 462 DMIPS.
Typical applications include industrial HMI panels, embedded networking gateways, motor control drives, audio equipment, medical instrumentation, and IoT edge nodes. The combination of Ethernet, CAN, and USB makes it well suited to gateway and protocol-conversion designs.
When designing with this MCU, pay close attention to the VCAP decoupling capacitors, the 25 MHz HSE crystal layout, and the power sequencing of VDD, VDDA, and VBAT rails. The 144-pin LQFP package requires careful thermal and ground-plane planning for high-speed USB and Ethernet signals.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for selection, second-sourcing, and layout decisions.
Bộ thay thế dễ dàng lắp đặt cho STM32F746ZGT7 — 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 STM32F746ZGT7 (cùng hình factor và footprint) — khác nhau ở Package, Flash Memory, LCD-TFT Controller, Operating Temperature, DAC.
STM32F746ZGT6
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →STM32F745ZGT7
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →STM32F746ZET7
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
STM32F746ZGT7TR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
STM32F745ZET7
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
STM32F746ZGT7 Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M7 32-bit RISC with FPU |
| Maximum CPU Frequency | 216 MHz |
| Flash Memory | 1 MB (1M x 8) |
| SRAM | 320 KB total (including 64 KB DTCM, 16 KB ITCM) |
| CoreMark Score | 1082 CoreMark at 216 MHz |
| DMIPS | 462 DMIPS |
| Operating Voltage | 1.7 V to 3.6 V |
| Hộp | 144-LQFP (20x20 mm) |
| Số chân | 144 |
| GPIO Count | Up to 168 I/O ports with interrupt capability |
| Ethernet | 10/100 Ethernet MAC with IEEE 1588 |
| USB | USB OTG HS and FS |
| CAN | 2x CAN interfaces |
| LCD-TFT Controller | Yes, with Chrom-ART Accelerator |
| ADC | 3x 12-bit ADC |
| DAC | 2x 12-bit DAC |
| Nhiệt độ hoạt động | -40C to +105C |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân STM32F746ZGT7
| Chân 1 | PE2 — GPIO / TRACECLK / SAI1_MCLK_A / ETH_MII_TXD3 |
| Chân 2 | PE3 — GPIO / TRACED0 / SAI1_SD_B |
| Chân 3 | PE4 — GPIO / TRACED1 / SAI1_FS_A / DCMI_D4 |
| Chân 4 | PE5 — GPIO / TRACED2 / SAI1_SCK_A / DCMI_D6 |
| Chân 5 | PE6 — GPIO / TRACED3 / SAI1_SD_A / DCMI_D7 |
| Chân 6 | VBAT — Backup battery supply |
| Chân 7 | PC13 — GPIO / RTC_TAMP1 / RTC_TS / WKUP2 |
| Chân 8 | PC14-OSC32_IN — LSE oscillator input / GPIO |
| Chân 9 | PC15-OSC32_OUT — LSE oscillator output / GPIO |
| Chân 10 | VSS — Ground |
| Chân 11 | VDD — Digital power supply |
| Chân 12 | PH0-OSC_IN — HSE oscillator input / GPIO |
| Chân 13 | PH1-OSC_OUT — HSE oscillator output / GPIO |
| Chân 14 | NRST — Reset input (active low) |
| Chân 15 | PC0 — GPIO / ADC123_IN10 / SAI1_MCLK_B |
| Chân 16 | PC1 — GPIO / ADC123_IN11 / ETH_MDC |
| Chân 17 | PC2 — GPIO / ADC123_IN12 / ETH_MII_TXD2 |
| Chân 18 | PC3 — GPIO / ADC123_IN13 / ETH_MII_TX_CLK |
| Chân 19 | VDD — Digital power supply |
| Chân 20 | VSSA — Analog ground |
| Chân 21 | VREF+ — ADC/DAC reference voltage |
| Chân 22 | VDDA — Analog power supply |
| Chân 23 | PA0-WKUP — GPIO / ADC123_IN0 / TIM2_CH1 / WKUP1 |
| Chân 24 | PA1 — GPIO / ADC123_IN1 / TIM2_CH2 / ETH_RMII_REF_CLK |
| Chân 25 | PA2 — GPIO / ADC123_IN2 / TIM2_CH3 / ETH_MDIO |
| Chân 26 | PA3 — GPIO / ADC123_IN3 / TIM2_CH4 / ETH_MII_COL |
| Chân 27 | VSS — Ground |
| Chân 28 | VDD — Digital power supply |
| Chân 29 | PA4 — GPIO / ADC12_IN4 / DAC_OUT1 / SPI1_NSS |
| Chân 30 | PA5 — GPIO / ADC12_IN5 / DAC_OUT2 / SPI1_SCK |
| Chân 31 | PA6 — GPIO / ADC12_IN6 / TIM3_CH1 / SPI1_MISO |
| Chân 32 | PA7 — GPIO / ADC12_IN7 / TIM3_CH2 / SPI1_MOSI / ETH_RMII_CRS_DV |
| Chân 33 | PC4 — GPIO / ADC123_IN14 / ETH_RMII_RXD0 |
| Chân 34 | PC5 — GPIO / ADC123_IN15 / ETH_RMII_RXD1 |
| Chân 35 | PB0 — GPIO / ADC12_IN8 / TIM3_CH3 / ETH_MII_RXD2 |
| Chân 36 | PB1 — GPIO / ADC12_IN9 / TIM3_CH4 / ETH_MII_RXD3 |
| Chân 37 | PB2 — GPIO / RTC_ALARM_OUT / ETH_MII_TX_ER |
| Chân 38 | PE7 — GPIO / TIM1_ETR / FMC_D4 / DCMI_D2 |
| Chân 39 | PE8 — GPIO / TIM1_CH1N / FMC_D5 / DCMI_D3 |
| Chân 40 | PE9 — GPIO / TIM1_CH1 / FMC_D6 / DCMI_D0 |
| Chân 41 | PE10 — GPIO / TIM1_CH2N / FMC_D7 / DCMI_D1 |
| Chân 42 | PE11 — GPIO / TIM1_CH2 / FMC_D8 / SPI4_NSS |
| Chân 43 | PE12 — GPIO / TIM1_CH3N / FMC_D9 / SPI4_SCK |
| Chân 44 | PE13 — GPIO / TIM1_CH3 / FMC_D10 / SPI4_MISO |
| Chân 45 | PE14 — GPIO / TIM1_CH4 / FMC_D11 / SPI4_MOSI |
| Chân 46 | PE15 — GPIO / TIM1_BKIN / FMC_D12 |
| Chân 47 | PB10 — GPIO / TIM2_CH3 / I2C2_SCL / ETH_MII_RX_ER |
| Chân 48 | PB11 — GPIO / TIM2_CH4 / I2C2_SDA / ETH_RMII_TX_EN |
| Chân 49 | VCAP_1 — Core voltage regulator capacitor |
| Chân 50 | VDD — Digital power supply |
| Chân 51 | PB12 — GPIO / TIM1_BKIN / I2C2_SMBA / SPI2_NSS / CAN2_RX |
| Chân 52 | PB13 — GPIO / TIM1_CH1N / SPI2_SCK / CAN2_TX |
| Chân 53 | PB14 — GPIO / TIM1_CH2N / SPI2_MISO / USART3_TX |
| Chân 54 | PB15 — GPIO / TIM1_CH3N / SPI2_MOSI / USART3_RX |
| Chân 55 | PD8 — GPIO / USART3_TX / FMC_D13 |
| Chân 56 | PD9 — GPIO / USART3_RX / FMC_D14 |
| Chân 57 | PD10 — GPIO / USART3_CK / FMC_D15 |
| Chân 58 | PD11 — GPIO / USART3_CTS / FMC_A16 / FMC_CLE |
| Chân 59 | PD12 — GPIO / TIM4_CH1 / FMC_A17 / FMC_ALE |
| Chân 60 | PD13 — GPIO / TIM4_CH2 / FMC_A18 |
| Chân 61 | PD14 — GPIO / TIM4_CH3 / FMC_D0 |
| Chân 62 | PD15 — GPIO / TIM4_CH4 / FMC_D1 |
| Chân 63 | PC6 — GPIO / TIM3_CH1 / USART6_TX / DCMI_D0 / SDMMC1_D0 |
| Chân 64 | PC7 — GPIO / TIM3_CH2 / USART6_RX / DCMI_D1 / SDMMC1_D1 |
| Chân 65 | PC8 — GPIO / TIM3_CH3 / USART6_CK / DCMI_D2 / SDMMC1_D2 |
| Chân 66 | PC9 — GPIO / TIM3_CH4 / I2C3_SDA / DCMI_D3 / SDMMC1_D3 |
| Chân 67 | PA8 — GPIO / TIM1_CH1 / I2C3_SCL / USART1_CK / MCO1 |
| Chân 68 | PA9 — GPIO / TIM1_CH2 / USART1_TX / USB_OTG_FS_ID |
| Chân 69 | PA10 — GPIO / TIM1_CH3 / USART1_RX / USB_OTG_FS_DM |
| Chân 70 | PA11 — GPIO / TIM1_CH4 / USART1_CTS / USB_OTG_FS_DP / CAN1_RX |
| Chân 71 | PA12 — GPIO / TIM1_ETR / USART1_RTS / USB_OTG_FS_DP / CAN1_TX |
| Chân 72 | PA13 — GPIO / JTMS-SWDIO |
| Chân 73 | VCAP_2 — Core voltage regulator capacitor |
| Chân 74 | VSS — Ground |
| Chân 75 | VDD — Digital power supply |
| Chân 76 | PA14 — GPIO / JTCK-SWCLK |
| Chân 77 | PA15 — GPIO / JTDI / TIM2_CH1 / SPI1_NSS |
| Chân 78 | PC10 — GPIO / USART3_TX / SPI3_SCK / SDMMC1_D2 / DCMI_D8 |
| Chân 79 | PC11 — GPIO / USART3_RX / SPI3_MISO / SDMMC1_D3 / DCMI_D4 |
| Chân 80 | PC12 — GPIO / USART3_CK / SPI3_MOSI / SDMMC1_CK / DCMI_D9 |
| Chân 81 | PD0 — GPIO / CAN1_RX / FMC_D2 |
| Chân 82 | PD1 — GPIO / CAN1_TX / FMC_D3 |
| Chân 83 | PD2 — GPIO / TIM3_ETR / SDMMC1_CMD / DCMI_D11 |
| Chân 84 | PD3 — GPIO / USART2_CTS / FMC_CLK / DCMI_D5 |
| Chân 85 | PD4 — GPIO / USART2_RTS / FMC_NOE |
| Chân 86 | PD5 — GPIO / USART2_TX / FMC_NWE |
| Chân 87 | PD6 — GPIO / USART2_RX / FMC_NWAIT / DCMI_D10 |
| Chân 88 | PD7 — GPIO / USART2_CK / FMC_NE1 |
| Chân 89 | PG9 — GPIO / USART6_RX / FMC_NE2 / DCMI_VSYNC |
| Chân 90 | PG10 — GPIO / FMC_NE3 / DCMI_D2 / LCD_G3 |
| Chân 91 | PG11 — GPIO / ETH_MII_TX_EN / DCMI_D3 / LCD_B3 |
| Chân 92 | PG12 — GPIO / USART6_RTS / FMC_NE4 / LCD_B4 |
| Chân 93 | PG13 — GPIO / USART6_CTS / ETH_MII_TXD0 / FMC_A24 |
| Chân 94 | PG14 — GPIO / USART6_TX / ETH_MII_TXD1 / FMC_A25 |
| Chân 95 | VSS — Ground |
| Chân 96 | VDD — Digital power supply |
| Chân 97 | PG15 — GPIO / USART6_CTS / DCMI_D13 |
| Chân 98 | PB3 — GPIO / JTDO / TIM2_CH2 / SPI1_SCK / ETH_MII_TX_CLK |
| Chân 99 | PB4 — GPIO / NJTRST / TIM3_CH1 / SPI1_MISO |
| Chân 100 | PB5 — GPIO / TIM3_CH2 / SPI1_MOSI / CAN2_RX / ETH_PPS_OUT |
| Chân 101 | PB6 — GPIO / TIM4_CH1 / I2C1_SCL / USART1_TX / CAN2_TX |
| Chân 102 | PB7 — GPIO / TIM4_CH2 / I2C1_SDA / USART1_RX / FMC_NL |
| Chân 103 | BOOT0 — Boot mode selection |
| Chân 104 | PB8 — GPIO / TIM4_CH3 / I2C1_SCL / CAN1_RX / SDMMC1_D4 |
| Chân 105 | PB9 — GPIO / TIM4_CH4 / I2C1_SDA / CAN1_TX / SDMMC1_D5 |
| Chân 106 | PE0 — GPIO / TIM4_ETR / FMC_NBL0 / DCMI_D2 |
| Chân 107 | PE1 — GPIO / FMC_NBL1 / DCMI_D3 |
| Chân 108 | VSS — Ground |
| Chân 109 | VDD — Digital power supply |
| Chân 110 | PF0 — GPIO / I2C2_SDA / FMC_A0 |
| Chân 111 | PF1 — GPIO / I2C2_SCL / FMC_A1 |
| Chân 112 | PF2 — GPIO / I2C2_SMBA / FMC_A2 |
| Chân 113 | PF3 — GPIO / ADC3_IN9 / FMC_A3 |
| Chân 114 | PF4 — GPIO / ADC3_IN14 / FMC_A4 |
| Chân 115 | PF5 — GPIO / ADC3_IN15 / FMC_A5 |
| Chân 116 | VSS — Ground |
| Chân 117 | VDD — Digital power supply |
| Chân 118 | PF6 — GPIO / ADC3_IN4 / TIM10_CH1 / FMC_A6 |
| Chân 119 | PF7 — GPIO / ADC3_IN5 / TIM11_CH1 / FMC_A7 |
| Chân 120 | PF8 — GPIO / ADC3_IN6 / TIM13_CH1 / FMC_A8 |
| Chân 121 | PF9 — GPIO / ADC3_IN7 / TIM14_CH1 / FMC_A9 |
| Chân 122 | PF10 — GPIO / ADC3_IN8 / FMC_A10 |
| Chân 123 | PH2 — GPIO / ETH_MII_CRS / FMC_SDCKE0 / LCD_R0 |
| Chân 124 | PH3 — GPIO / ETH_MII_COL / FMC_SDNE0 / LCD_R1 |
| Chân 125 | PH4 — GPIO / I2C2_SCL / USB_OTG_HS_ULPI_NXT / LCD_G4 |
| Chân 126 | PH5 — GPIO / I2C2_SDA / SPI5_NSS / LCD_G5 |
| Chân 127 | PF11 — GPIO / SPI5_MOSI / DCMI_D12 / LCD_G6 |
| Chân 128 | PF12 — GPIO / FMC_A11 / LCD_G7 |
| Chân 129 | VSS — Ground |
| Chân 130 | VDD — Digital power supply |
| Chân 131 | PF13 — GPIO / FMC_A12 / LCD_G7 |
| Chân 132 | PF14 — GPIO / FMC_A13 / LCD_G7 |
| Chân 133 | PF15 — GPIO / FMC_A14 / LCD_G7 |
| Chân 134 | PG0 — GPIO / FMC_A15 / LCD_G7 |
| Chân 135 | PG1 — GPIO / FMC_A16 / LCD_G7 |
| Chân 136 | PE2 — GPIO / TRACECLK / SAI1_MCLK_A / ETH_MII_TXD3 |
| Chân 137 | PE3 — GPIO / TRACED0 / SAI1_SD_B |
| Chân 138 | PE4 — GPIO / TRACED1 / SAI1_FS_A / DCMI_D4 |
| Chân 139 | PE5 — GPIO / TRACED2 / SAI1_SCK_A / DCMI_D6 |
| Chân 140 | PE6 — GPIO / TRACED3 / SAI1_SD_A / DCMI_D7 |
| Chân 141 | VSS — Ground |
| Chân 142 | VDD — Digital power supply |
| Chân 143 | PDR_ON — Power-down reset enable |
| Chân 144 | VDD — Digital power supply |
Ứng dụng tiêu biểu
STM32F746ZGT7 phù hợp cho 6 Áp dụngs: Industrial HMI Panels, Embedded Networking Gateways, Motor Control Drives, Audio Processing Equipment, Medical Instrumentation, IoT Edge Nodes.
Industrial HMI Panels
The STM32F746ZGT7 fits industrial human-machine interface panels because its 216 MHz Cortex-M7 core, 1 MB Flash, and integrated LCD-TFT controller with Chrom-ART Accelerator drive TFT displays up to SVGA resolution without an external graphics chip. The Chrom-ART block offloads pixel blending and alpha compositing, cutting CPU load by up to 80% compared with software rendering, which leaves headroom for the application logic and touch handling. The 144-pin LQFP package provides up to 168 GPIOs for keypads, encoders, and status LEDs, while the 10/100 Ethernet MAC with IEEE 1588 supports factory-floor networking and time synchronization. Designers should budget the 320 KB SRAM carefully: a double-buffered 800x480 RGB565 frame buffer consumes about 768 KB, so external SDRAM via the FMC is typically required for full-screen graphics.
Được đề xuất
Embedded Networking Gateways
The STM32F746ZGT7 is well suited to embedded networking gateways because it integrates a 10/100 Ethernet MAC with IEEE 1588 precision time protocol, dual CAN controllers, and USB OTG HS/FS on a single 144-pin device. The 216 MHz Cortex-M7 core with FPU and DSP instructions handles protocol stacks such as lwIP, Modbus TCP, and CANopen while still leaving cycles for application processing. The 1 MB Flash accommodates a full TCP/IP stack plus a bootloader and application image, and the 320 KB SRAM supports multiple socket buffers and DMA descriptors. A key trade-off is that the Ethernet MAC requires an external PHY and a 25 MHz reference clock; designers must route the RMII signals with controlled impedance and keep the PHY within a few centimeters of the MCU to preserve signal integrity.
Được đề xuất
Motor Control Drives
The STM32F746ZGT7 suits motor control drives because its Cortex-M7 core with single-precision FPU and DSP extensions executes field-oriented control loops in a fraction of the time required by Cortex-M4 devices, enabling higher PWM frequencies and lower current ripple. Three 12-bit ADCs with up to 2.4 MSPS sample phase currents and bus voltage simultaneously, while advanced timers generate complementary PWM with dead-time insertion for three-phase inverters. Dual CAN interfaces support industrial drive networks, and the 144-pin package provides enough pins for encoder inputs, fault signals, and communication. A practical consideration is that the ADC sampling must be synchronized to the PWM carrier to avoid switching noise; ST's motor control SDK provides reference firmware that demonstrates this synchronization on the STM32F7 series.
Được đề xuất
Audio Processing Equipment
The STM32F746ZGT7 is a strong fit for audio processing equipment because the 216 MHz Cortex-M7 with FPU and DSP instructions runs biquad filter banks, FFT analysis, and sample-rate conversion in real time, while the integrated SAI and I2S peripherals interface directly to audio codecs and DACs. The 1 MB Flash stores firmware and coefficient tables, and the 320 KB SRAM buffers multi-channel audio streams without external memory. The device also supports USB Audio Class 2.0 through its OTG HS controller, enabling high-resolution playback and recording. Designers should note that the SAI peripheral requires a low-jitter master clock; using the internal PLL with a 25 MHz crystal typically achieves the required audio-grade jitter performance, but an external audio clock generator may be needed for professional applications.
Được đề xuất
Medical Instrumentation
The STM32F746ZGT7 supports medical instrumentation designs that require fast signal processing and reliable connectivity. Its 216 MHz Cortex-M7 core with FPU executes digital filters and peak-detection algorithms for patient monitors and diagnostic devices, while the three 12-bit ADCs digitize sensor channels and the dual DACs generate calibration or stimulation waveforms. The 1 MB Flash and 320 KB SRAM accommodate signal-processing libraries and data logging buffers, and the USB OTG interface supports connection to a host PC for data transfer. A critical design consideration is that medical devices must meet IEC 60601 isolation and EMC requirements; the MCU itself is not isolated, so external digital isolators and careful ground partitioning are required on the analog front end.
Được đề xuất
IoT Edge Nodes
The STM32F746ZGT7 serves IoT edge nodes that need local processing power plus multiple connectivity options. The 216 MHz Cortex-M7 core with FPU runs lightweight neural-network inference and sensor-fusion algorithms at the edge, reducing cloud bandwidth and latency, while the Ethernet MAC, USB OTG, and dual CAN interfaces provide wired connectivity and the UART/SPI/I2C peripherals connect to wireless modules such as Wi-Fi, Bluetooth, and LoRa. The 1 MB Flash stores firmware and machine-learning models, and the 320 KB SRAM buffers sensor data. A practical trade-off is power: the Cortex-M7 at 216 MHz draws substantially more current than a Cortex-M4, so battery-powered nodes should use the low-power modes aggressively and consider the STM32F745 or STM32L4 series for always-on sensing.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho STM32F746ZGT7 — 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 | STM32F746ZGT6 | STM32F745ZGT7 | STM32F746ZET7 | STM32F746ZGT7TR |
|---|---|---|---|---|---|
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU | ARM Cortex-M7 with FPU |
| Maximum CPU Frequency | 216 MHz | 216 MHz | 216 MHz | 216 MHz | 216 MHz |
| Flash Memory | 1 MB | 1 MB | 1 MB | 512 KB | 1 MB |
| SRAM | 320 KB | 320 KB | 320 KB | 320 KB | 320 KB |
| LCD-TFT Controller | Yes (with Chrom-ART) | Yes (with Chrom-ART) | No | Yes (with Chrom-ART) | Yes (with Chrom-ART) |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +105C | -40C to +105C | -40C to +105C |
| Ethernet MAC | 10/100 with IEEE 1588 | 10/100 with IEEE 1588 | 10/100 with IEEE 1588 | 10/100 with IEEE 1588 | 10/100 with IEEE 1588 |
| USB | USB OTG HS and FS | USB OTG HS and FS | USB OTG HS and FS | USB OTG HS and FS | USB OTG HS and FS |
Bảo phân biệt quan trọng
- Higher temperature grade than STM32F746ZGT6 (vsSTM32F746ZGT6)
- Integrated LCD-TFT controller and Chrom-ART Accelerator (vsSTM32F745ZGT7)
- Double the Flash of the STM32F746ZET7 (vsSTM32F746ZET7)
- Full graphics and networking feature set in one package (vsSTM32F429ZGT6)
Ghi chú thiết kế
The STM32F746ZGT7 requires two VCAP pins (VCAP_1 on pin 49 and VCAP_2 on pin 73) to be decoupled with 2.2 uF low-ESR ceramic capacitors to VSS. These capacitors stabilize the internal 1.2 V core regulator and must be placed within 10 mm of the pins with short, wide traces. Omitting or undersizing them causes erratic operation and possible core lockup at 216 MHz. Estimated: at 216 MHz with all peripherals active, core current is approximately 250 mA, so the regulator's transient response depends heavily on these capacitors.
Route the 25 MHz HSE crystal as close as possible to pins 12 (PH0-OSC_IN) and 13 (PH1-OSC_OUT), keeping the loop area under 100 mm squared and guarding it with ground. Use a crystal with load capacitance matched to the two external capacitors (typically 10-20 pF each) and verify the negative resistance margin exceeds 5x the crystal ESR. For Ethernet designs, route the RMII signals (REF_CLK, TXD0/1, TX_EN, RXD0/1, CRS_DV) as 50 ohm controlled-impedance traces and keep them away from the crystal and analog supply pins.
Do not leave the BOOT0 pin (pin 103) floating. It must be tied to VSS through a 10 kOhm resistor for normal Flash boot, or to VDD for system memory bootloader entry. Also ensure the PDR_ON pin (pin 143) is tied to VDD for normal operation; pulling it low disables the internal power-down reset and can prevent startup. Finally, the VDDA and VREF+ pins must be powered even if the ADC and DAC are unused, because the internal analog blocks share this rail.
Estimated: the STM32F746ZGT7 in the 144-LQFP package has a junction-to-ambient thermal resistance of approximately 40 C/W on a standard 4-layer board. At 216 MHz with Ethernet and USB active, total power dissipation is roughly 400 mW, giving a junction rise of about 16 C above ambient. This is well within the +105C limit for most industrial environments, but designs operating near the maximum ambient should add thermal vias under the exposed pad area and ensure adequate copper pour.
Thông tin tuân thủ
RoHS and REACH compliance per STMicroelectronics product page. Not AEC-Q100 qualified; the STM32F746ZGT7 is an industrial-grade device rated -40C to +105C. Halogen-free status not stated in the provided data.
