GigaDevice has expanded its GD32 family of 32-bit microcontrollers with the introduction of the GD32F503 and GD32F505 series, built on the Arm Cortex-M33 core. Designed for applications requiring high computational performance and reliability, the new series operates at up to 280 MHz and supports advanced security, configurable memory, and extensive peripheral integration.
The MCUs feature up to 1 MB of Flash memory and 192 KB of SRAM, allowing developers to tailor memory allocation between code and data through scatter loading. This flexibility enables efficient resource use in complex systems such as industrial automation, digital power, robotics, and battery management.
Built on the Arm v8-M architecture, the GD32F503 runs at 252 MHz while the GD32F505 reaches 280 MHz. Both integrate a single-precision floating-point unit and a DSP hardware accelerator, achieving up to 4.10 CoreMark/MHz and 1.51 DMIPS/MHz. This performance profile supports real-time control and precision processing for embedded industrial and motor-control systems.
Peripheral integration includes three 3 Msps ADCs supporting up to 25 channels, a DAC, and a fast comparator for rapid feedback and protection. Communication interfaces include multiple SPIs, I²Cs, I²Ss, UARTs, CAN-FD channels, and USB Full Speed. The timing subsystem provides one 32-bit and several 16-bit general-purpose, basic, and PWM-capable timers to enable flexible and accurate control in applications such as digital power and motor drives.
Operating from 2.6 V to 3.6 V, the series supports an industrial-grade temperature range from –40 °C to +105 °C and includes three power-saving modes for efficiency in portable or battery-powered systems. Enhanced electromagnetic compatibility and ESD protection (8 kV contact, 15 kV air) ensure reliability in harsh electrical environments. The design supports continuous operation beyond 25 years in typical industrial conditions.
The GD32F503/505 devices integrate a Secure Boot and Secure Firmware Update (SBSFU) platform, along with AES-128/256, SHA-256, and True Random Number Generator hardware engines. Additional safety features include watchdogs, power and clock monitors, and CRC protection. The series has achieved IEC 61508 SC3 (SIL 2/SIL 3) certification, and is supported by a Safety Package including FMEDA reports and safety manuals to accelerate compliance for industrial developers.
Available in multiple package options including LQFP, QFN, and BGA, the MCUs are supported by the GD32 development ecosystem—comprising the GD32 Embedded Builder IDE, GD-LINK debugging tools, and the GD32 All-in-One Programmer—along with third-party toolchains from Arm KEIL, IAR, and SEGGER. Samples and development boards are now available, with volume production planned for December.
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