STMicroelectronics STM32F100RBT6B

Overview

STM32F100RBT6B from STMicroelectronics is a low-density value-line ARM® Cortex®-M3 microcontroller with 128 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) for embedded control in industrial sensors and motor drives.

For engineers reviewing the STM32F100RBT6B datasheet, STM32F100RBT6B pinout, STM32F100RBT6B application, or STM32F100RBT6B equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 51 pins), RTC with VBAT support, SWD/JTAG debug interface, and operating voltage range (2.0–3.6 V).

Technical Context

The device implements an ARM Cortex-M3 core with single-cycle multiply and hardware divide, delivering 1.25 DMIPS/MHz performance. Its clock system includes 4–24 MHz HSE, 8 MHz factory-trimmed HSI, 40 kHz LSI, and PLL for CPU clock scaling.

Peripherals are tightly coupled via AHB/APB buses: 7-channel DMA services ADC, DAC, timers, USARTs, SPIs, and I²Cs; NVIC supports 64 interrupts with configurable priority; EXTI maps all GPIOs to 16 external interrupt vectors.

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 STM32F030F4P6, the STM32F100RBT6B offers higher analog precision and real-time control capability; compared with STM32F103C8T6, it trades raw speed for enhanced low-power retention and integrated backup functionality.

Availability

STM32F100RBT6B is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control interfaces, smart metering endpoints, and home appliance UI controllers requiring stable component supply across extended product lifecycles.

Supply support for STM32F100RBT6B 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 STM32F100 value line targets cost-sensitive, resource-constrained embedded applications requiring robust analog integration, low-power operation, and industrial-grade reliability without sacrificing ARM Cortex-M3 architecture benefits.

FAQ

What is the maximum operating frequency and corresponding power consumption of the STM32F100RBT6B?

The STM32F100RBT6B operates at up to 24 MHz. At 24 MHz and 3.6 V, typical active current is 14.4 mA (code from Flash, peripherals enabled). In Stop mode with regulator in low-power state, current drops to 3.5 µA at 25°C-enabling battery life extension in intermittent-sensing applications.

Does the STM32F100RBT6B support external memory expansion?

No. The STM32F100RBT6B does not include FSMC or external bus interface. It relies solely on its embedded 128 KB Flash and 8 KB SRAM. For applications requiring external memory, consider STM32F103 or higher-density families with FSMC support.

Can the internal RC oscillators be used for precise timing-critical applications like UART communication?

The 8 MHz HSI is factory-trimmed to ±1% accuracy, sufficient for UART at ≤115.2 kbps with standard error margins. For higher baud rates or tighter tolerance, use the 4–24 MHz HSE crystal oscillator, which achieves ±50 ppm stability with proper PCB layout and load capacitor selection.

How many independent PWM channels can be generated simultaneously using the advanced-control timer?

The advanced-control timer (TIM1) supports up to 6 independent PWM outputs with complementary pairs, dead-time insertion, and emergency stop capability. All six channels operate synchronously from a single counter, enabling precise three-phase motor drive waveforms without software coordination.