GD32F405VGT6 GD32: GigaDevice General-Purpose MCU Series F405: High-Performance F4 Core Product Line V: LQFP100 Package G: 1MB Flash T: 192KB SRAM 6: Industrial-Grade Temperature -40℃ ~ +85℃ II. Core Hardware Parameters Core & Clock ARM Cortex‑M4 32-bit core with hardware FPU, max 168MHz clock speed, supports DSP instruction set. Memory Capacity Flash: 1MB (1024KB) SRAM: 192KB (176KB main RAM + 16KB CCM core-dedicated RAM) Package & Pins LQFP100, 100-pin SMD, standard industrial SMD size, pin-compatible with STM32F405VGT6. Operating Voltage Main supply: 1.8V ~ 3.6V; 5V-tolerant I/O; internal 1.2V core regulator. Temperature Grade Suffix "6": Industrial-grade -40℃ ~ 85℃; no automotive version. III. On-Chip Peripheral Resources Communication Interfaces 8x USART/UART (with hardware flow control) 4x SPI (up to 42MHz) 3x I2C 2x CAN 2.0B 1x SDIO (SD card support) 10/100M Ethernet MAC (built-in PHY interface) USB OTG HS/FS high-speed USB Analog Peripherals 3x 12-bit ADC, up to 24 channels, 36MHz sampling 2x 12-bit DAC 2x operational amplifiers (OPA) Multiple voltage comparators Timer Control 2x advanced timers TIM1/TIM8 (complementary PWM, dead-time, brake for motor drive) 4x general-purpose 16-bit timers 2x basic timers System tick timer, watchdog Other Features FMC external memory controller (SRAM/NOR Flash/LCD bus) 8x DMA controller CRC hardware checksum, RNG true random number generator Hardware encryption hash (HASH) Hardware watchdog, low-power modes (Stop/Standby) IV. Power Modes Run mode: 168MHz full-speed operation Sleep mode: Core halted, peripherals active Stop mode: Main clock off, RAM retained, fast wakeup Standby mode: Lowest power, only backup domain powered V. Comparable Models Fully pin/software-compatible replacement: STM32F405VGT6 Advantages: Domestic alternative, stable supply, shorter lead time, lower cost. GD32 standard library compatible with STM32 standard library, minimal migration effort. VI. Typical Applications Industrial controllers, servo motor drives Ethernet data acquisition devices High-speed USB data loggers Image capture, LCD industrial displays Instrumentation, multi-channel signal acquisition IoT gateways, SD card storage devices VII. Development Support IDE: GD32CubeProgrammer, Keil MDK, IAR Firmware libraries: GD32F40x standard library, GD32Cube full driver Debugging: J-Link/DAPLink, supports 4-wire SWD Reference board: GD32F405VGT6 eval board (Ethernet, USB, LCD, motor interfaces) VIII. Procurement & Packaging Packaging: Tape & reel LQFP100 Channels: GigaDevice OEM or domestic distributors with ready stock, preferred solution for ST shortage replacement.