STMicroelectronics STM32F101R8T6

Overview

STM32F101R8T6 from STMicroelectronics is a 32-bit ARM Cortex-M3 microcontroller in LQFP48 package, featuring 64 KB Flash, 10 KB SRAM, 36 MHz max CPU frequency, 12-bit ADC with 16 channels, and seven communication interfaces including up to 3 USARTs, 2 I²C, and 2 SPI. It targets embedded control in industrial sensors and motor drives requiring deterministic real-time response and low-voltage operation (2.0–3.6 V).

For engineers reviewing the STM32F101R8T6 datasheet, STM32F101R8T6 pinout, STM32F101R8T6 application, or STM32F101R8T6 equivalent, key selection criteria include Flash/SRAM size, peripheral count (especially ADC channels and USARTs), LQFP48 footprint compatibility, and support for SWD debug and RTC with VBAT backup.

Technical Context

The STM32F101R8T6 implements an ARM Cortex-M3 core with Harvard bus architecture, single-cycle multiplication, and hardware divide, delivering 1.25 DMIPS/MHz at 36 MHz. Its clock system integrates dual oscillators (4–16 MHz HSE + 32.768 kHz LSE), PLL for CPU clock scaling, and factory-trimmed 8 MHz HSI RC source.

Peripheral subsystems include a 7-channel DMA controller servicing timers, ADC, SPI, I²C, and USARTs; nested vectored interrupt controller (NVIC) supporting 68 interrupts; and full GPIO remapping across 51 pins - all with 5 V-tolerant capability except analog inputs.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified. Pin count and layout match industry-standard 48-pin MCU footprints for drop-in PCB compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6, the STM32F101R8T6 delivers superior analog integration and power management for sensor-centric designs; versus STM32F103C8T6, it trades USB capability for lower cost and reduced layout complexity in non-USB applications.

Availability

STM32F101R8T6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, motor drive feedback units, and medical diagnostic handhelds requiring stable component supply and long-term production continuity.

Supply support for STM32F101R8T6 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 automotive ICs since 1987.

The STM32F101xx series belongs to ST's medium-density access line - engineered for cost-sensitive, resource-constrained embedded applications where reliability, low power, and peripheral flexibility outweigh high-performance compute needs.

FAQ

What is the maximum operating frequency and associated power consumption?

The STM32F101R8T6 operates at up to 36 MHz with typical active current of 24 mA at 3.6 V and 36 MHz (code running from Flash, peripherals enabled). At 8 MHz, current drops to ~10 mA under identical conditions. Full electrical characteristics, including temperature-dependent curves, are specified in Section 5.3.5 of the datasheet.

Does this MCU support in-application programming (IAP) of Flash memory?

Yes - the STM32F101R8T6 supports IAP via its built-in system memory bootloader or user firmware using the Flash programming registers (FLASH_CR, FLASH_AR). The 64 KB Flash is organized into 128 × 512-byte pages, enabling sector-erase and word-program operations without external hardware.

How many I/O pins are 5 V tolerant, and which ones are exceptions?

Of the 51 I/O pins, all are 5 V tolerant except PA0–PA3 when configured as ADC inputs, and PB12–PB15 when used as FSMC address lines. This tolerance allows direct interfacing with legacy 5 V logic without level shifters in most digital control applications.

Is the internal temperature sensor calibrated, and what is its accuracy?

The internal temperature sensor is factory-calibrated at 25 °C and 110 °C, with typical accuracy of ±5 °C over –40 to +85 °C ambient. Raw ADC readings require linear interpolation between calibration points; full characterization data appears in Table 45 of the datasheet.