STMicroelectronics STM32F100RET6BTR

Overview

STM32F100RET6BTR from STMicroelectronics is a high-density value-line Arm® Cortex®-M3 microcontroller with 512 KB Flash, 32 KB SRAM, 24 MHz max CPU frequency, dual 12-bit DACs, and up to 112 I/Os in LQFP64 package - deployed in industrial HMI front-ends requiring real-time analog control and multi-interface connectivity.

For engineers reviewing the STM32F100RET6BTR datasheet, STM32F100RET6BTR pinout, STM32F100RET6BTR application, or STM32F100RET6BTR equivalent, key selection criteria include Flash/SRAM capacity, DAC resolution and speed, timer advanced-control features (dead-time generation), and 5 V-tolerant I/O count for legacy bus interfacing.

Technical Context

The device integrates an Arm Cortex-M3 core with single-cycle multiply/hardware divide, supporting deterministic real-time execution. Its clock system combines 4–24 MHz external crystal, 8 MHz factory-trimmed RC, and 40 kHz low-power RC, feeding a programmable PLL for precise CPU and peripheral clock derivation.

Memory architecture includes flexible static memory controller (FSMC) with four chip selects for SRAM/PSRAM/NOR expansion, plus LCD parallel interface (8080/6800 modes). Analog subsystem comprises one 12-bit, 1.2 µs ADC (16 channels, 0–3.6 V range) and two synchronized 12-bit DACs with dedicated 16-bit timers.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, rated for industrial 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 STM32F072RBT6, STM32F100RET6BTR delivers higher analog integration (dual DAC, temperature sensor) and memory bandwidth for HMI; versus STM32F103RET6, it trades CPU speed and extended temperature for lower power consumption and optimized cost in industrial control endpoints.

Availability

STM32F100RET6BTR is available at Aetrix Electronics and suitable for industrial HMI panels, smart power meters, motor control gateways, and CEC-enabled AV remote hubs requiring stable component supply across multi-year production cycles.

Supply support for STM32F100RET6BTR 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

This part belongs to the STM32F100 Value Line - engineered for cost-sensitive industrial control and HMI applications where balanced performance, analog integration, and robust I/O flexibility are prioritized over maximum clock speed.

FAQ

What is the maximum operating frequency and corresponding power supply range?

The STM32F100RET6BTR operates at up to 24 MHz with a supply voltage range of 2.0 V to 3.6 V. At 24 MHz, typical active current consumption is 36 mA (Flash execution, peripherals enabled), and the internal voltage regulator maintains stable core operation across this full voltage window without external regulation.

Does this MCU support hardware-accelerated cryptographic functions?

No, the STM32F100RET6BTR does not include dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption tasks. For hardware crypto, consider STM32F2xx or STM32L4xx series devices with integrated cryptographic processors.

Can the dual DAC outputs be synchronized and updated simultaneously?

Yes, both 12-bit DAC channels can be triggered simultaneously using the TSEL bits in DAC_CR register and synchronized via TIM2 or TIM4 update events. This enables precise phase-aligned analog waveform generation for applications like differential sensor excitation or dual-channel audio synthesis.

Is the LQFP64 package of STM32F100RET6BTR pin-compatible with other STM32F100 variants?

Yes, all STM32F100xT parts in LQFP64 (e.g., STM32F100C8T6, STM32F100R8T6) share identical pinouts and mechanical footprint. Functional differences (Flash size, peripheral count) are masked by software configuration - enabling scalable design reuse across product tiers.