STMicroelectronics STM32F100RDT6B

Overview

STM32F100RDT6B from STMicroelectronics is a high-density value-line Arm® Cortex®-M3 microcontroller with 384 KB Flash, 32 KB SRAM, 24 MHz max CPU frequency, dual 12-bit DACs, and 16-channel 12-bit ADC - deployed in industrial motor control interfaces requiring real-time PWM generation, analog sensing, and serial communication.

For engineers reviewing the STM32F100RDT6B datasheet, STM32F100RDT6B pinout, STM32F100RDT6B application, or STM32F100RDT6B equivalent, key selection criteria include Flash/SRAM capacity, 100-pin LQFP package compatibility, integrated RTC with VBAT support, SWD/JTAG debug interface, and full peripheral set including CEC, FSMC, and LCD parallel interface.

Technical Context

The STM32F100RDT6B implements an Arm Cortex-M3 core with single-cycle multiplication and hardware division, delivering 1.25 DMIPS/MHz at 24 MHz. Its clock system integrates dual oscillators (4–24 MHz HSE + 32.768 kHz LSE), programmable PLL, and factory-trimmed 8 MHz HSI for flexible timing source selection.

It features a flexible static memory controller (FSMC) supporting SRAM, PSRAM, and NOR devices across four chip selects, plus an 8080/6800-mode LCD parallel interface - enabling direct connection to character/graphic displays without external logic.

Key Specifications

Pinout & Package

LQFP100 package (14 × 14 mm, 0.5 mm pitch), RoHS-compliant, operating junction temperature range –40°C to +85°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F100RDT6B, STM32F072RBT6 offers lower cost and power but reduced peripheral integration, while STM32F103RCT6 delivers higher CPU throughput and USB support at the expense of analog output capability - making STM32F100RDT6B optimal for mixed-signal embedded systems needing DACs, RTC, and memory expansion in constrained space.

Availability

STM32F100RDT6B is available at Aetrix Electronics and suitable for industrial motor control interfaces, smart energy meter front-ends, HMI terminals, and medical diagnostic sensor hubs requiring stable component supply across long-lifecycle production programs.

Supply support for STM32F100RDT6B 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 management ICs, sensors, and automotive-grade components since 1987.

The STM32F100 value line targets cost-optimized industrial and consumer applications requiring rich analog integration, real-time control, and extended temperature operation - balancing performance, peripheral density, and price for high-volume embedded systems.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32F100RDT6B operates at up to 24 MHz with an Arm Cortex-M3 core delivering 1.25 DMIPS/MHz (Dhrystone 2.1). This yields ~30 DMIPS total performance - sufficient for real-time PID control, sensor fusion, and protocol stack processing without external co-processors.

Does this MCU support external memory expansion, and what interfaces are available?

Yes - it integrates a Flexible Static Memory Controller (FSMC) with four chip selects supporting asynchronous/synchronous SRAM, PSRAM, and NOR flash in multiplexed or non-multiplexed modes. Timing parameters are fully configurable via registers, enabling direct connection to common memory devices without address latches or glue logic.

How many analog-to-digital and digital-to-analog converter channels does it provide?

It includes one 12-bit ADC with up to 16 input channels and two independent 12-bit DACs. The ADC supports 1.2 µs conversion time and built-in temperature sensor; each DAC has dedicated output buffers and supports noise-shaping modes for improved resolution in audio or calibration applications.

Is the STM32F100RDT6B pin-compatible with other STM32F100 variants in the same package?

Yes - all STM32F100x D-series devices in LQFP100 (e.g., STM32F100RDT6, STM32F100VDT6) share identical pinouts and electrical characteristics. Firmware is binary-compatible across same-density variants, enabling scalable design reuse by changing Flash/SRAM size via part number without PCB revision.