STMicroelectronics STM32F100R8T7BTR

Overview

STM32F100R8T7BTR from STMicroelectronics is a 32-bit ARM® Cortex®-M3 microcontroller in LQFP64 package, featuring 64 KB Flash, 8 KB SRAM, 24 MHz max CPU frequency, 1×12-bit ADC (16-channel), and 2×12-bit DACs. It integrates 12 timers-including advanced-control and basic timers-and supports up to 8 communication interfaces (3×USART, 2×SPI, 2×I²C, CEC) for embedded control in industrial sensors and motor drives.

For engineers reviewing the STM32F100R8T7BTR datasheet, STM32F100R8T7BTR pinout, STM32F100R8T7BTR application, or STM32F100R8T7BTR equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 51 pins), RTC with VBAT backup, SWD/JTAG debug support, and low-power Stop/Standby modes for battery-operated devices.

Technical Context

The device implements a tightly coupled ARM Cortex-M3 core with single-cycle multiplication and hardware division, delivering 1.25 DMIPS/MHz performance. Its clock system includes dual oscillators (4–24 MHz HSE and 32 kHz LSE), an 8 MHz factory-trimmed HSI RC, and a PLL supporting flexible CPU clock derivation.

Peripherals are managed via a 7-channel DMA controller servicing timers, ADC, SPI, I²C, USART, and DACs. The NVIC supports 64 interrupt channels with programmable priority, while EXTI maps all GPIOs to 16 external interrupt vectors for responsive event handling.

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 STM32F100R8T7BTR, STM32F072RBT6 offers higher clock speed but sacrifices analog capability and low-power precision, while STM32F103R8T6 provides more RAM and USB but omits VBAT-backed RTC and PVD-making the F100 variant optimal for battery-backed, analog-rich, safety-aware embedded control.

Availability

STM32F100R8T7BTR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, motor drive feedback modules, and medical infusion pump controllers requiring stable component supply and long-term lifecycle support.

Supply support for STM32F100R8T7BTR 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, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components.

This part belongs to the STM32F100 value line-a cost-optimized, low-power Cortex-M3 MCU family targeting resource-constrained industrial and consumer applications where analog integration and robust power management are essential.

FAQ

What is the maximum operating temperature range for STM32F100R8T7BTR?

The STM32F100R8T7BTR is rated for industrial temperature range: –40 °C to +85 °C. This is confirmed in Section 5.3.1 of the datasheet (DocID16455 Rev 9), where ambient operating conditions specify T_A = –40 to 85 °C under V_DD = 2.0–3.6 V. Thermal derating is not required within this range.

Does STM32F100R8T7BTR support USB connectivity?

No, STM32F100R8T7BTR does not include a USB peripheral. Unlike the STM32F103 series, the F100 value line omits USB OTG and related PHY circuitry. Communication is limited to USART, SPI, I²C, and CEC interfaces as specified in Table 2 and Section 2.2.16–2.2.19 of the datasheet.

How many external interrupt lines are available on this MCU?

The device supports 16 external interrupt 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 digital input pin.

Is the internal 8 MHz RC oscillator factory-trimmed?

Yes, the internal 8 MHz high-speed RC oscillator (HSI) is factory-trimmed to ±1% accuracy across the full temperature and voltage range. This specification is documented in Table 23 (HSI oscillator characteristics) and validated per Section 5.3.7 of the datasheet, eliminating need for external crystal in non-precision timing applications.