STMicroelectronics STM32F100R6T6B

Overview

STM32F100R6T6B 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 subsystems.

For engineers reviewing the STM32F100R6T6B datasheet, STM32F100R6T6B pinout, STM32F100R6T6B application, or STM32F100R6T6B equivalent, key selection criteria include Flash/SRAM size, DAC count, 5 V-tolerant I/O support, RTC with VBAT backup, and SWD/JTAG debug compatibility for embedded firmware development.

Technical Context

The device implements an ARM Cortex-M3 core with single-cycle multiply and hardware divide, supporting deterministic real-time execution. It integrates nested vectored interrupt controller (NVIC) with 64 interrupts and external event controller (EXTI) enabling wake-up from low-power modes on any GPIO.

Clock architecture includes dual oscillators (8 MHz HSI ±1%, 32 kHz LSE), PLL for CPU clock scaling up to 24 MHz, and independent 32 kHz RTC oscillator with calibration. Power management supports Sleep, Stop, and Standby modes with VBAT-backed RTC and backup registers.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6, STM32F100R6T6B delivers higher analog integration (dual DAC, calibrated RTC) at lower clock speed; versus STM32F103C8T6, it trades raw performance for CEC support and tighter power envelope - making it optimal for cost-sensitive, feature-specific embedded control.

Availability

STM32F100R6T6B is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control subsystems, home automation gateways, and medical diagnostic peripherals requiring stable component supply across extended production lifecycles.

Supply support for STM32F100R6T6B 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, sensors, and automotive-grade components with emphasis on energy efficiency and industrial reliability.

The STM32F100 value line targets cost-sensitive, low-power embedded applications demanding rich analog integration (ADC/DAC), precise timing (RTC), and standardized communication (CEC, LIN, IrDA) without sacrificing ARM ecosystem compatibility.

FAQ

What is the maximum operating frequency and associated power consumption of STM32F100R6T6B?

The STM32F100R6T6B operates at up to 24 MHz CPU frequency. At 24 MHz and 3.6 V supply, typical active-mode current is 11.4 mA (code from Flash, peripherals enabled). In Stop mode with regulator in low-power state, current drops to 2.7 µA at 25°C - verified per datasheet Table 15 and Figure 16.

Does STM32F100R6T6B support 5 V-tolerant I/Os, and which pins are exempt?

Yes, 50 of the 51 GPIOs are 5 V-tolerant when configured as inputs or outputs in push-pull mode. The exception is NRST, which accepts only 3.6 V max. This tolerance is confirmed in Section 5.3.13 (I/O port characteristics) and Table 34 of the datasheet, enabling direct interfacing with 5 V logic without level shifters.

Can the internal temperature sensor be used for system-level thermal monitoring?

Yes - the integrated temperature sensor is factory-calibrated and connected to ADC channel 16. Its output spans 1.42 V at 25°C with ±1.5°C accuracy over –40 to +85°C (Table 47). It requires VDDA ≥ 2.4 V and sampling at ≤1 MHz ADC clock for valid readings, as specified in Section 2.2.24 and Table 42.

What debug interfaces does STM32F100R6T6B support, and are they pin-compatible with other STM32F1xx devices?

It supports Serial Wire Debug (SWD) via SWDIO and SWCLK pins, plus full JTAG (TCK/TMS/TDI/TDO/TRESET). SWD uses only two pins and is electrically identical across STM32F100/F103/F105 families. Pin mapping matches STM32F103C8T6's PA13/PA14, enabling shared debug hardware and OpenOCD configuration files.