STMicroelectronics STM32F101RDT6

Overview

STM32F101RDT6 from STMicroelectronics is a high-density ARM® Cortex®-M3 32-bit microcontroller with 384 KB Flash, 48 KB SRAM, and 51 GPIOs in LQFP64 package. It integrates a 12-bit ADC (1 µs conversion), dual 12-bit DACs, nine timers including two watchdogs and SysTick, and ten communication interfaces (2×I²C, 3×SPI, 3×USART). It targets industrial control panels requiring real-time sensor acquisition and local actuator drive.

For engineers reviewing the STM32F101RDT6 datasheet, STM32F101RDT6 pinout, STM32F101RDT6 application, or STM32F101RDT6 equivalent, key selection criteria include Flash/SRAM capacity, ADC/DAC resolution and speed, timer count and PWM capability, I/O voltage tolerance (5 V-tolerant), and LQFP64 thermal performance for convection-cooled enclosures.

Technical Context

The STM32F101RDT6 implements a tightly coupled ARM Cortex-M3 core with Harvard bus architecture, single-cycle multiplication, and hardware divide, operating at up to 36 MHz with 1.25 DMIPS/MHz. Its clock system includes dual oscillators (4–16 MHz HSE and 8 MHz HSI) plus PLL for precise frequency synthesis and RTC support via 32 kHz LSE.

Peripheral integration centers on deterministic real-time operation: the Flexible Static Memory Controller (FSMC) supports NOR/PSRAM expansion, while the 12-channel DMA controller offloads data movement from ADC, DAC, SPI, I²C, and USART-enabling concurrent analog capture, waveform generation, and serial telemetry without CPU intervention.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, ECOPACK® certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103RBT6, the STM32F101RDT6 offers 6× more Flash and 2.4× more SRAM for larger embedded applications, while STM32F072RBT6 trades analog precision and memory for USB integration and lower active power-making each suitable for distinct system architecture priorities.

Availability

STM32F101RDT6 is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, motor control interfaces, and programmable logic relays requiring stable component supply across multi-year production cycles.

Supply support for STM32F101RDT6 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 STM32F101xx series belongs to ST's mainstream ARM Cortex-M3 portfolio, engineered specifically for cost-sensitive industrial control applications demanding rich peripheral integration, deterministic real-time response, and extended temperature operation (–40 to +85 °C).

FAQ

What is the maximum operating frequency and core performance of the STM32F101RDT6?

The STM32F101RDT6 operates at a maximum frequency of 36 MHz with an ARM Cortex-M3 core delivering 1.25 DMIPS/MHz (Dhrystone 2.1). This yields ~45 DMIPS total performance, sufficient for real-time control loops, sensor fusion algorithms, and basic graphics rendering in resource-constrained HMI applications.

Does the STM32F101RDT6 support external memory expansion?

Yes, it integrates a Flexible Static Memory Controller (FSMC) supporting NOR, PSRAM, NAND, and CompactFlash memories via four chip-select lines. The LQFP64 package exposes 26 address/data multiplexed lines and control signals, enabling direct attachment of external display frame buffers or data loggers without additional glue logic.

How many analog-to-digital and digital-to-analog converter channels does this MCU provide?

The STM32F101RDT6 includes one 12-bit ADC with up to 16 input channels and two 12-bit DACs with buffered voltage outputs. The ADC achieves 1 µs conversion time across its full range (0–3.6 V), and both DACs support noise suppression modes and configurable trigger sources (timers, software, external events).

Is the STM32F101RDT6 pin-compatible with other STM32F101xx variants?

Yes, within the LQFP64 package group (e.g., STM32F101C8T6, STM32F101CBT6), the STM32F101RDT6 shares identical pin assignments and electrical characteristics. Differences lie only in Flash size (384 KB vs 64/128 KB) and SRAM (48 KB), allowing firmware reuse and hardware scalability without PCB redesign.