STMicroelectronics STM32F101RFT6

Overview

STM32F101RFT6 from STMicroelectronics is an ARM® Cortex®-M3 32-bit microcontroller with 768 KB Flash, 80 KB SRAM, and operation up to 36 MHz. It integrates one 12-bit ADC (1 µs conversion), two 12-bit DACs, ten 16-bit timers, and supports I²C, SPI, USART, and FSMC for NOR/PSRAM/NAND memory expansion. It targets industrial control panels requiring deterministic real-time response and integrated analog I/O.

For engineers reviewing the STM32F101RFT6 datasheet, STM32F101RFT6 pinout, STM32F101RFT6 application, or STM32F101RFT6 equivalent, key selection considerations include Flash size vs. peripheral count trade-offs, LQFP64 package thermal limits in sealed enclosures, dual-bank Flash read-while-write capability for firmware updates, and VBAT-backed RTC + backup registers for power-loss resilience.

Technical Context

The STM32F101RFT6 implements a Harvard-architecture Cortex-M3 core with Memory Protection Unit (MPU), supporting deterministic interrupt latency and memory isolation. Its clock tree integrates four oscillator sources: 4–16 MHz HSE, 8 MHz factory-trimmed HSI, 40 kHz LSI with calibration, and 32.768 kHz LSE for RTC.

The flexible static memory controller (FSMC) provides dedicated timing control for asynchronous/synchronous NOR, PSRAM, NAND, and CompactFlash, with four chip-select outputs and configurable data bus width (8/16-bit). Peripheral interconnect uses AHB/APB buses with DMA channels mapped to ADC, DAC, timers, and communication interfaces.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified. Thermal resistance θ_JA = 46 °C/W (JEDEC standard board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103RBT6, the STM32F101RFT6 offers larger memory and FSMC for external display/memory but omits USB; versus STM32F072RBT6, it delivers higher analog integration and deterministic M3 performance at the cost of higher active power and BOM complexity.

Availability

STM32F101RFT6 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, PLC I/O modules, and medical infusion pump controllers requiring stable component supply across extended product lifecycles.

Supply support for STM32F101RFT6 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.

The STM32F101 access line targets cost-sensitive industrial and consumer applications requiring high peripheral integration, robust real-time performance, and long-term supply stability - optimized for deterministic control with minimal external components.

FAQ

What is the maximum operating frequency and associated power consumption of the STM32F101RFT6?

The STM32F101RFT6 operates at up to 36 MHz. At 3.6 V and 36 MHz with all peripherals enabled and code executing from Flash, typical current consumption is 36 mA. In Sleep mode under same conditions, it drops to 11 mA. These values are measured per Section 5.3.5 of the official datasheet (DocID16553 Rev 5).

Does the STM32F101RFT6 support USB or CAN interfaces?

No. The STM32F101RFT6 does not integrate USB or CAN peripherals. It supports up to 3 USARTs, 2 I²C, 3 SPI, and IrDA-capable UARTs. USB 2.0 Full-Speed and CAN 2.0B are available only on the STM32F103 and higher-series variants, not the F101 access line.

How is the 12-bit ADC calibrated, and what is its effective resolution in practice?

The ADC includes factory calibration for offset and gain errors, stored in system memory. With calibration applied and proper PCB layout (separate analog/digital grounds, VDDA filtering), typical INL is ±1.5 LSB and ENOB reaches 11.2 bits at 1 MSPS. Accuracy degrades above 14 MHz ADC clock due to aperture jitter; recommended f_ADC ≤ 14 MHz per Table 57.

What debug interfaces are supported, and is JTAG fully available on the LQFP64 package?

The STM32F101RFT6 supports Serial Wire Debug (SWD) and JTAG. However, the LQFP64 package exposes only SWDIO and SWCLK pins (PA13/PA14); TDI, TDO, TMS, and TCK are not routed out. Full JTAG requires LQFP100 or LQFP144 packages per Figure 4 and Table 5 in the datasheet.