STMicroelectronics STM32F103R6T6

Overview

STM32F103R6T6 from STMicroelectronics is a low-density performance-line ARM Cortex-M3 microcontroller with 32 KB Flash, 10 KB SRAM, and integrated USB 2.0 full-speed and CAN 2.0B interfaces. It operates at up to 72 MHz, features dual 12-bit ADCs (1 µs conversion), six timers including motor-control PWM with dead-time generation, and supports 51 I/Os in LQFP64 package. It is deployed in industrial motor control systems requiring real-time position feedback and communication over CAN bus.

For engineers reviewing the STM32F103R6T6 datasheet, STM32F103R6T6 pinout, STM32F103R6T6 application, or STM32F103R6T6 equivalent, key selection criteria include its 72 MHz Cortex-M3 core, USB+CAN dual-interface capability, 32 KB Flash/10 KB SRAM memory configuration, LQFP64 mechanical compatibility, and support for embedded real-time control with hardware CRC and 96-bit unique ID.

Technical Context

The STM32F103R6T6 implements an ARM Cortex-M3 core with Harvard architecture, single-cycle multiplication, and hardware divide, enabling deterministic interrupt latency and efficient real-time task scheduling. Its clock system integrates a 4–16 MHz external crystal oscillator, 8 MHz factory-trimmed internal RC, 40 kHz LSI, and PLL for CPU clock derivation - supporting precise timing for USB frame synchronization and CAN bit timing.

Peripheral integration includes two independent 12-bit ADCs with dual-sample-and-hold, enabling simultaneous sampling of motor phase currents; a 7-channel DMA controller servicing ADC, timers, SPI, I²C, and USARTs; and nested vectored interrupt controller (NVIC) with 68 interrupt channels for prioritized event handling in motion control loops.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK® construction. Pin count and layout match STM32F103x6 family for drop-in replacement across memory variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103C6T6, the STM32F103R6T6 offers 25 more GPIOs and native CAN routing in LQFP64, making it optimal for distributed I/O systems; versus STM32F103VCT6, it trades memory scalability for lower BOM cost and simpler layout - ideal for cost-sensitive, fixed-function motor controllers.

Availability

STM32F103R6T6 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, USB-capable HMI panels, and PLC I/O modules requiring stable component supply across extended production lifecycles.

Supply support for STM32F103R6T6 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F103x6 series belongs to ST's mainstream Cortex-M3 portfolio, engineered specifically for cost-sensitive real-time control applications demanding USB connectivity, CAN bus integration, and deterministic interrupt response in harsh environments.

FAQ

What is the maximum operating frequency and associated power consumption of the STM32F103R6T6?

The STM32F103R6T6 achieves a maximum CPU frequency of 72 MHz with zero wait-state Flash access. At 3.3 V and 72 MHz, typical active current consumption is 36 mA (code from Flash, peripherals enabled), rising to 42 mA at 3.6 V. In Stop mode with regulator active, current drops to 12 µA at 25°C - verified per datasheet Table 16 and Figure 16.

Does the STM32F103R6T6 support USB device functionality without external components?

Yes - the part integrates a full-speed USB 2.0 transceiver with internal termination and pull-up resistor control. Only a 1.5 kΩ pull-up on PA12 (D+) is required for device enumeration; no external PHY, transceiver, or ESD protection diodes are mandatory for basic CDC or HID class operation per Section 2.3.20 and Figure 23 of the datasheet.

How many ADC channels can be simultaneously sampled, and what is the effective resolution in differential mode?

The STM32F103R6T6 contains two independent 12-bit ADCs, each supporting up to 16 external channels. Dual-sample-and-hold allows true simultaneous sampling of two signals (e.g., phase currents). While the ADC is inherently single-ended, external op-amp circuitry can implement pseudo-differential acquisition; the datasheet specifies ±1 LSB INL and ±1.5 LSB DNL - no native differential mode or hardware averaging is provided.

Is the STM32F103R6T6 pin-compatible with higher-memory variants like the STM32F103VCT6?

No - the STM32F103R6T6 uses LQFP64 packaging, while the STM32F103VCT6 uses LQFP100. Although both share identical peripheral signal naming and functional mapping, their pin counts, layouts, and power/ground pin distributions differ fundamentally. Migration requires PCB redesign; however, firmware is largely portable due to identical register maps and HAL library support.