STMicroelectronics STM32F103RGT6

Overview

STM32F103RGT6 from STMicroelectronics is a high-density ARM® Cortex®-M3 microcontroller operating at 72 MHz, featuring 1 MB Flash, 96 KB SRAM, USB 2.0 full-speed interface, CAN 2.0B controller, and three 12-bit ADCs with 21 input channels - deployed in industrial motor control systems requiring real-time PWM generation, analog sensing, and fieldbus communication.

For engineers reviewing the STM32F103RGT6 datasheet, STM32F103RGT6 pinout, STM32F103RGT6 application, or STM32F103RGT6 equivalent, key selection criteria include Flash/SRAM capacity, USB/CAN coexistence, 5 V-tolerant I/O count (up to 51), 17 timer resources including motor-control PWM with dead-time, and LQFP64 package compatibility with legacy PCB layouts.

Technical Context

The device implements a tightly coupled ARM Cortex-M3 core with Memory Protection Unit (MPU), supporting deterministic interrupt handling via NVIC and precise timing through a hierarchical clock tree with multiple PLL configurations. It integrates a flexible static memory controller (FSMC) supporting NOR/PSRAM/NAND and an LCD parallel interface in 8080/6800 modes.

Peripheral coexistence is architecturally enforced: dual CAN and USB operate independently without resource conflict; 12-channel DMA routes data between ADCs, DACs, SPI/I2S, USARTs, and timers; and the 24-bit SysTick timer provides OS tick support while two watchdogs (independent + window) ensure fail-safe operation.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified, rated for industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F103RGT6, the F407 offers double clock speed and FPU for computationally intensive tasks but requires layout changes for USB routing and lacks the F1's mature ecosystem for CAN+USB coexistence; the G474 improves analog integration and PWM fidelity but removes USB full-speed, limiting direct PC interface capability.

Availability

STM32F103RGT6 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, PLC I/O modules, and medical diagnostic sensor hubs requiring stable component supply across extended product lifecycles.

Supply support for STM32F103RGT6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components since 1987.

The STM32F1 Series targets cost-sensitive, high-reliability embedded applications demanding rich analog integration, real-time peripherals, and long-term availability - especially in industrial automation and motor control.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32F103RGT6 achieves 72 MHz using an internal PLL that multiplies the 8 MHz HSI or external 4–16 MHz crystal oscillator. The PLL input must be divided to 1–2 MHz before multiplication; final system clock is derived from PLL output via AHB prescaler. No external clock source above 16 MHz is supported.

Does this MCU support USB device mode without external PHY?

Yes - the STM32F103RGT6 integrates a full-speed USB 2.0 device-mode transceiver compliant with USB Specification Rev 2.0. It requires only passive termination (1.5 kΩ pull-up on DP) and standard USB connector wiring; no external PHY or level shifter is needed for basic HID, CDC, or MSC class operation.

How many independent CAN interfaces does it have?

The STM32F103RGT6 includes exactly one CAN 2.0B-compliant controller with two message mailboxes and three FIFO filters. It supports standard and extended identifiers, loopback/self-test mode, and bit rates up to 1 Mbit/s - sufficient for single-bus industrial networks but not dual-CAN topologies.

Is the LQFP64 package pin-compatible with other STM32F103 variants?

Yes - all STM32F103x6 devices (e.g., STM32F103C6, STM32F103T6) share identical LQFP64 pinouts and electrical characteristics. However, memory size, peripheral enablement (e.g., USB presence), and clock tree options differ; firmware must validate feature availability before assuming full functional equivalence.