STMicroelectronics STM32F100R6H6B

Overview

STM32F100R6H6B from STMicroelectronics is a 32-bit ARM Cortex-M3 microcontroller in LQFP64 package, featuring 32 KB Flash, 4 KB SRAM, 24 MHz max CPU frequency, 1×12-bit ADC (16-channel), 2×12-bit DACs, and 8 communication interfaces including USART, SPI, I²C, and CEC - deployed in industrial sensor nodes and motor control edge modules.

For engineers reviewing the STM32F100R6H6B datasheet, STM32F100R6H6B pinout, STM32F100R6H6B application, or STM32F100R6H6B equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 51 pins), RTC with VBAT support, SWD debug interface, and integrated temperature sensor for embedded thermal monitoring.

Technical Context

The STM32F100R6H6B implements an ARM Cortex-M3 core with single-cycle multiplication and hardware division, executing at up to 24 MHz (1.25 DMIPS/MHz). Its clock system integrates a 4–24 MHz external crystal oscillator, 8 MHz factory-trimmed RC, 40 kHz RC, PLL for CPU clock generation, and 32 kHz RTC oscillator with calibration.

Peripheral architecture includes a 7-channel DMA controller servicing timers, ADC, SPI, I²C, USART, and DAC; nested vectored interrupt controller (NVIC) supporting up to 68 interrupts; and remappable GPIOs with 5 V tolerance on most pins - enabling flexible signal routing in space-constrained PCB layouts.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK®-certified - suitable for automated SMT assembly and industrial thermal cycling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6, the STM32F100R6H6B delivers superior analog capability and system-level features like CEC and PVD; versus STM32F103C8T6, it trades raw speed for tighter power control and application-specific peripherals ideal for battery-powered or HDMI-integrated designs.

Availability

STM32F100R6H6B is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, energy meter front-ends, and CEC-controlled AV hubs requiring stable component supply across multi-year production cycles.

Supply support for STM32F100R6H6B 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 ICs, MEMS, and automotive semiconductors since 1987.

The STM32F100 value line targets cost-sensitive, space-constrained industrial and consumer applications requiring robust analog integration, low-power operation, and standardized ARM software compatibility.

FAQ

What is the maximum operating frequency and associated power consumption?

The STM32F100R6H6B operates at up to 24 MHz with typical active current of 12.5 mA at 3.3 V and 24 MHz (code from Flash, peripherals enabled). At 8 MHz, current drops to ~5.2 mA under identical conditions - enabling dynamic frequency scaling to balance performance and battery life in portable designs.

Does this MCU support hardware encryption or secure boot?

No. The STM32F100R6H6B does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It relies on software-based security measures; for certified secure firmware execution, ST's STM32L4 or STM32H7 series with TRNG and secure memory isolation are recommended alternatives.

Can the internal 8 MHz RC oscillator be used as the system clock source?

Yes. The internal 8 MHz RC oscillator is factory-trimmed to ±1% accuracy and can serve as the system clock source without external components. It supports full-speed operation and is commonly used in cost-sensitive designs where crystal-free startup is preferred, though external crystals provide better timing stability for UART or USB applications.

What is the purpose of the VBAT pin and how is it used with RTC?

The VBAT pin supplies backup power to the RTC and 42-byte backup registers during main power loss. When connected to a coin cell (e.g., CR1220), it maintains calendar time and retains critical settings across power cycles - essential for timestamping sensor logs or scheduling wake-ups in battery-backed systems.