STMicroelectronics STM32F100R8H6B

Overview

STM32F100R8H6B 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, 12-bit ADC (16-channel), dual 12-bit DACs, and 8 communication interfaces including USART, SPI, I²C, and CEC. It targets cost-sensitive industrial control and sensor interface applications requiring integrated analog peripherals and low-power operation.

For engineers reviewing the STM32F100R8H6B datasheet, STM32F100R8H6B pinout, STM32F100R8H6B application, or STM32F100R8H6B equivalent, key selection criteria include Flash/SRAM size, ADC/DAC resolution and channel count, timer advanced-control capability (e.g., dead-time generation), 5 V-tolerant I/O count, and RTC with VBAT support for battery-backed timekeeping.

Technical Context

The STM32F100R8H6B implements an ARM Cortex-M3 core with single-cycle multiply and hardware divide, executing at up to 24 MHz with 1.25 DMIPS/MHz performance. Its clock system integrates a 4–24 MHz external crystal oscillator, 8 MHz factory-trimmed internal RC, 40 kHz RC, PLL for CPU clock scaling, and dedicated 32 kHz oscillator for RTC 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 enabling flexible signal routing across 51 I/O pins - nearly all 5 V-tolerant and configurable as external interrupt sources.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package 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 STM32F072RBT6, the STM32F100R8H6B provides superior analog integration (dual DAC, calibrated RTC) at lower clock speed; versus STM32G071RBT6, it offers proven industrial qualification and CEC support but less memory and compute headroom.

Availability

STM32F100R8H6B is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, smart building controls, and portable instrumentation requiring stable component supply across long product lifecycles.

Supply support for STM32F100R8H6B 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, sensors, and automotive ICs with broad industrial and consumer reach.

The STM32F100 value line targets cost-optimized, low-power embedded applications where analog integration, reliability, and long-term availability outweigh peak performance - especially in sensor nodes, PLC modules, and appliance controllers.

FAQ

What is the maximum operating temperature range for STM32F100R8H6B?

The STM32F100R8H6B 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), specifying operation under full electrical characteristics within this ambient range. No extended or automotive grade variant exists for this part number.

Does STM32F100R8H6B support USB device functionality?

No, the STM32F100R8H6B does not include a USB peripheral. The device family lacks USB PHY and controller hardware - confirmed by absence in Table 2 (features and peripheral counts) and block diagram (Figure 1). Communication interfaces are limited to USART, SPI, I²C, CAN (not present in F100x8), and CEC.

How many external interrupt lines are available on STM32F100R8H6B?

The STM32F100R8H6B supports 16 external interrupt lines (EXTI0–EXTI15), each mapped to one GPIO pin per port (e.g., PA0 → EXTI0, PB0 → EXTI0). All 51 GPIOs can be configured to trigger these lines, enabling flexible edge-sensitive event detection across multiple sensors or buttons.

Is the internal 8 MHz RC oscillator factory-trimmed, and what is its accuracy?

Yes, the internal 8 MHz RC oscillator is factory-trimmed to ±1% accuracy at 25 °C and 3.3 V, as specified in Table 23 (HSI oscillator characteristics). Accuracy degrades to ±2.5% over full temperature and voltage range (–40 °C to +85 °C, 2.0–3.6 V), making it suitable for non-critical timing but not for UART baud rate generation without calibration.