STMicroelectronics STM32F100RET7BTR

Overview

STM32F100RET7BTR from STMicroelectronics is a high-density value-line Arm® Cortex®-M3 microcontroller featuring 512 KB Flash, 32 KB SRAM, 24 MHz max CPU frequency, dual 12-bit DACs, and 16-channel 12-bit ADC with temperature sensor-used in industrial HMI control panels requiring real-time analog I/O and LCD interface support.

For engineers reviewing the STM32F100RET7BTR datasheet, STM32F100RET7BTR pinout, STM32F100RET7BTR application, or STM32F100RET7BTR equivalent, key selection criteria include Flash/SRAM capacity, integrated DAC/ADC precision, LQFP64 package compatibility, and support for FSMC-based external memory expansion in cost-sensitive embedded designs.

Technical Context

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

Peripheral architecture includes a flexible static memory controller (FSMC) supporting SRAM, PSRAM, and NOR devices across four chip selects; parallel LCD interface (8080/6800 modes); and 11 communication interfaces-including three USARTs with IrDA/LIN, two I²C, three SPIs, and CEC-enabling multi-protocol connectivity in compact industrial controllers.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad for enhanced power dissipation in continuous operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072RBT6, STM32F100RET7BTR offers superior analog integration and LCD support at lower clock speed; versus STM32F103RET6, it trades peak performance for optimized power efficiency and value-line cost structure while retaining full LQFP64 pin compatibility.

Availability

STM32F100RET7BTR is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, PLC I/O modules, and medical diagnostic handhelds requiring stable component supply and long-term production continuity.

Supply support for STM32F100RET7BTR 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-sensitive industrial and consumer applications requiring robust analog peripherals, low-power operation, and high integration density without premium performance premiums.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32F100RET7BTR?

The STM32F100RET7BTR operates at a maximum CPU frequency of 24 MHz, delivering 1.25 DMIPS per MHz (30 DMIPS total) under Dhrystone 2.1 benchmark conditions. This performance level is validated across the full temperature and voltage range specified in the datasheet (DS5944 Rev 11), with no derating required for typical industrial ambient conditions.

Does the STM32F100RET7BTR support external memory expansion, and if so, what types and capacities?

Yes, it integrates a Flexible Static Memory Controller (FSMC) with four chip selects supporting asynchronous and synchronous SRAM, PSRAM, and NOR flash devices. Maximum addressable space is 64 MB per bank, with verified timing for common densities up to 8 MB SRAM and 16 MB NOR flash using standard 100-pin LQFP package signal routing.

How many analog-to-digital converter (ADC) channels does this MCU provide, and what is their effective resolution?

The device features one 12-bit ADC with up to 16 external input channels and an internal temperature sensor. According to electrical characteristics table 51 in DS5944 Rev 11, it achieves ±1 LSB INL and ±1 LSB DNL over the full operating range, confirming true 12-bit effective resolution with no missing codes across 0–3.6 V input span.

Is the STM32F100RET7BTR pin-compatible with other members of the STM32F100 family, and which packages share identical pinouts?

Yes, the STM32F100RET7BTR in LQFP64 is pin-compatible with all other STM32F100x RET variants (e.g., STM32F100RBT6, STM32F100RCT6) sharing the same R-E-T suffix pattern and LQFP64 package. Pin definitions match Table 4 (High-density STM32F100xx pin definitions) in DS5944 Rev 11, with identical signal mapping across all 64 pins.