STMicroelectronics STM32F100R4H6B

Overview

STM32F100R4H6B from STMicroelectronics is a 32-bit ARM Cortex-M3 microcontroller in LQFP64 package, featuring 16 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 requiring low-power real-time control and analog signal conditioning.

For engineers reviewing the STM32F100R4H6B datasheet, STM32F100R4H6B pinout, STM32F100R4H6B application, or STM32F100R4H6B 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 environmental monitoring systems.

Technical Context

The device implements an ARM Cortex-M3 core with single-cycle multiply and hardware divide, supporting deterministic real-time execution at up to 24 MHz. Its clock system integrates dual oscillators (8 MHz HSI and 32 kHz LSE), programmable PLL, and PVD for supply monitoring - enabling precise timing control in battery-backed applications.

DMA supports 7 channels with peripheral arbitration for concurrent ADC sampling, DAC output, and serial data transfer without CPU intervention. The NVIC delivers 64 interrupt lines with configurable priority, while EXTI maps all GPIOs to 16 external interrupt vectors for responsive event-driven operation.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, ECOPACK® certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F100R4H6B, the STM32F030F4P6 trades RTC/DAC capability for lower cost and simpler toolchain, while the STM32F103C8T6 offers greater processing headroom and memory at the expense of missing CEC and tighter power budget control.

Availability

STM32F100R4H6B is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostats, portable data loggers, and motor control interface modules requiring stable component supply and long-term production continuity.

Supply support for STM32F100R4H6B 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 analog products for industrial, automotive, and consumer markets.

The STM32F100 value line targets cost-sensitive, low-power embedded applications requiring rich analog integration and robust real-time control - optimized for sensor fusion, human-machine interface, and battery-operated edge devices.

FAQ

What is the maximum operating frequency and associated power consumption in Run mode?

The STM32F100R4H6B operates at up to 24 MHz. At 24 MHz and 3.6 V, typical Run mode current is 12.5 mA with all peripherals enabled and code executing from Flash. This value scales linearly with voltage and frequency, and drops to ~3.5 mA when peripherals are disabled.

Does this MCU support USB or Ethernet connectivity?

No. The STM32F100R4H6B does not integrate USB or Ethernet peripherals. It provides USART, SPI, I²C, and CEC interfaces for wired communication. For USB connectivity, designers must use external transceivers or upgrade to STM32F105/F107 series with built-in USB OTG or Ethernet MAC.

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

Yes. The factory-trimmed 8 MHz HSI oscillator serves as a ready-to-use clock source with ±1% accuracy over temperature and voltage. It can directly drive the system clock or feed the PLL for higher frequencies, eliminating need for external crystals in non-precision timing applications.

How many pins support external interrupt capability, and are they all 5 V tolerant?

All 51 GPIO pins support external interrupt configuration via EXTI lines, mapped across 16 vectors. Of these, PA0–PA15, PB0–PB15, PC0–PC15, and PD2 are 5 V tolerant - confirmed by electrical characteristics tables in the datasheet (Section 5.3.13). Non-tolerant pins require level-shifting when interfacing with 5 V logic.