STMicroelectronics STM32F100R8T6BTR

Overview

STM32F100R8T6BTR from STMicroelectronics is a low-density value-line ARM® Cortex®-M3 microcontroller with 64 KB Flash, 8 KB SRAM, 24 MHz max CPU frequency, 12-bit ADC (16-channel), and dual 12-bit DACs. It integrates 12 timers-including advanced-control timer with dead-time generation-and supports up to 8 communication interfaces (3×USART, 2×SPI, 2×I²C, CEC) in an LQFP64 package for embedded control in industrial sensors and motor drives.

For engineers reviewing the STM32F100R8T6BTR datasheet, STM32F100R8T6BTR pinout, STM32F100R8T6BTR application, or STM32F100R8T6BTR equivalent, key selection criteria include Flash/SRAM size, 24 MHz Cortex-M3 performance, 5 V-tolerant I/O count (51 pins), RTC with VBAT support, and SWD/JTAG debug interface compatibility.

Technical Context

The device implements a nested vectored interrupt controller (NVIC) with 68 interrupt channels and supports remappable peripherals via alternate function I/O registers. Its clock system includes dual oscillators (4–24 MHz HSE and 32.768 kHz LSE), programmable PLL, and factory-trimmed 8 MHz HSI RC source.

Power management features Sleep/Stop/Standby modes with regulator control, PVD monitoring, and VBAT-supplied RTC with backup registers. DMA supports 7 channels across ADC, timers, USARTs, SPIs, I²Cs, and DACs-enabling zero-CPU-overhead peripheral data transfers.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F070RBT6, this part adds dual DACs and VBAT RTC for analog-rich, time-critical applications; versus STM32F103C8T6, it trades 12 KB SRAM for CEC and enhanced power supervision-ideal for smart energy and home automation endpoints.

Availability

STM32F100R8T6BTR is available at Aetrix Electronics and suitable for industrial sensor nodes, motor drive feedback systems, smart meter interfaces, and USB-C power negotiation modules requiring stable component supply across multi-year production cycles.

Supply support for STM32F100R8T6BTR 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, specializing in microcontrollers, power management, and automotive ICs with strong industrial and consumer market presence.

This device belongs to the STM32F100 value line-designed specifically for cost-optimized, low-power embedded control in appliances, industrial HMIs, and sensor edge nodes where Flash density, analog integration, and 5 V tolerance are critical.

FAQ

What is the maximum operating temperature range for STM32F100R8T6BTR?

The device is qualified for industrial temperature range: –40 °C to +85 °C. Electrical characteristics-including ADC accuracy, oscillator stability, and I/O drive strength-are fully specified across this range per ST's DocID16455 Rev 9, Section 5.3.1. Thermal derating is not required up to 85 °C ambient under standard PCB layout guidelines.

Does STM32F100R8T6BTR support USB device functionality?

No, this part lacks a USB PHY and dedicated USB controller. It belongs to the value-line F100 series, which omits USB to reduce cost and die size. For USB-capable alternatives in the same family, consider STM32F102 or STM32F103 variants, which integrate full-speed USB 2.0 device controllers.

Can the internal 8 MHz RC oscillator be used as the system clock source without external components?

Yes-the factory-trimmed 8 MHz HSI RC oscillator is fully functional as the system clock source. It achieves ±1% accuracy at 25 °C and supports automatic calibration via the RCC_CR register. No external crystal or capacitor is needed, making it ideal for rapid prototyping or space-constrained designs where timing precision is secondary to simplicity.

How many external interrupt lines are available on STM32F100R8T6BTR?

The device supports 16 external interrupt/event lines (EXTI0–EXTI15), each configurable to trigger on rising/falling edges or both. All 51 GPIO pins can be mapped to these 16 lines via the SYSCFG_EXTICR registers, enabling flexible wake-up and event handling from any I/O pin without dedicated interrupt pins.