GigaDevice Semiconductor Inc. · Beijing
GigaDevice GD32F303xB Cortex-M4 32-bit MCU
120 MHz Cortex-M4 MCU with 128 KB flash, 2.6 MSPS ADC and CAN
Overview
The GD32F303xB is a mainstream 32-bit general-purpose microcontroller from GigaDevice built on the Arm Cortex-M4 core with DSP instructions and floating-point support, running at up to 120 MHz with zero-wait-state flash access. It integrates up to 128 KB flash and 32 KB SRAM with three 12-bit 2.6 MSPS ADCs, two 12-bit DACs, advanced and general-purpose timers, and a broad communication set including SPI, I2C, USART/UART, I2S, USB device and CAN. The family targets industrial control, motor drives, human-machine interfaces, consumer equipment, security systems, POS and IoT devices.
Key highlights
- Arm Cortex-M4 core with DSP and FPU running at up to 120 MHz
- Up to 128 KB on-chip flash with zero wait states and 32 KB SRAM
- Three 12-bit 2.6 MSPS ADCs and two 12-bit DACs on chip
- Up to three SPI, two I2C, three USART, two UART, two I2S, USBD and CAN interfaces
- Four general 16-bit timers plus two advanced PWM and two basic timers
- 2.6 V to 3.6 V supply and -40 C to +85 C grade 6 temperature range
Technical parameters
25 published parameters, grouped. Source links are listed under “Data sources”.
Core
| Processor core | Arm Cortex-M4 32-bit RISC with DSP and FPU |
|---|---|
| Maximum operating frequency | 120 MHz |
| Flash access wait states at maximum frequency | Zero wait states |
| Memory protection unit (MPU) | Yes |
Memory
| On-chip flash memory | Up to 128 KB |
|---|---|
| On-chip SRAM | Up to 32 KB |
Electrical
| Supply voltage range | 2.6 V to 3.6 V |
|---|---|
| Operating temperature range (grade 6) | -40 C to +85 C |
| Power saving modes | Multiple sleep, deep-sleep and standby modes |
Peripherals
| Analog-to-digital converters | Up to 3 x 12-bit, 2.6 MSPS |
|---|---|
| Digital-to-analog converters | 2 x 12-bit |
| General-purpose 16-bit timers | Up to 4 |
| Advanced 16-bit PWM timers | 2 |
| Basic 16-bit timers | 2 |
| SPI interfaces | Up to 3 |
| I2C interfaces | Up to 2 |
| USART interfaces | Up to 3 |
| UART interfaces | Up to 2 |
| I2S interfaces | Up to 2 |
| USB device (USBD) | 1 |
| CAN interface | 1 |
| Peripheral buses | Two APB buses |
Package
| Package options | LQFP100, LQFP64, LQFP48, QFN48 |
|---|---|
| Real-time clock (RTC) | Yes |
Reliability
| Device grade | Grade 6, -40 C to +85 C |
|---|
Applications
- 1Industrial control and automation
- 2Motor drives and motor control
- 3Human machine interface (HMI)
- 4Consumer and handheld equipment
- 5Security and alarm systems
- 6Point-of-sale (POS) terminals
- 7IoT and connected devices
- 8Automotive navigation systems
Application video
No application video published yet.
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Request an application videoManufacturer
GigaDevice Semiconductor Inc.
Beijing · Private
GigaDevice Semiconductor Inc. (兆易创新) is a Beijing-based fabless semiconductor company known for SPI NOR and NAND flash memory, the GD32 Arm Cortex-M microcontroller family, touch and fingerprint sensors, and analog products. Its GD32 MCUs are marketed for industrial control, motor drives, consumer and handheld equipment, human-machine interfaces, IoT, computing and automotive applications. The official contact page lists regional sales inquiry addresses including emeainquiry@gigadevice.com and a Beijing switchboard at +86-10-82881666.
How we supply this product
We are a China-based export and sourcing company. This product is available for quotation through us — we buy from the manufacturer and ship to you, and we stay responsible for inspection and after-sales.
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Sample & approval
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Inspect & ship
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Not the exact configuration you need? Send the requirement and we will source alternatives, including models not listed in this catalogue.
Data sources & verification
Compiled from publicly available sources and last verified on 13 Sept 2026. Specifications can change without notice — confirm with the manufacturer before ordering.
- gigadevice.com.cn https://www.gigadevice.com.cn/Public/Uploads/uploadfile/files/20240403/GD32F303xB_Datasheet_Rev…
- gigadevice.com https://www.gigadevice.com/product/mcu/main-stream-mcus/gd32f30x-series/gd32f303
