STMicroelectronics STM32F101RGT6

Overview

STM32F101RGT6 from STMicroelectronics is an ARM® Cortex®-M3 based 32-bit microcontroller in LQFP64 package, delivering 36 MHz CPU frequency, 768 KB Flash with dual-bank read-while-write capability, 80 KB SRAM, and integrated peripherals including 1×12-bit ADC (16-channel), 2×12-bit DAC, 15 timers (including SysTick, watchdogs, and basic timers), and 10 communication interfaces (2×I²C, 3×SPI, 3×USART, 1×USB, 1×CAN). It serves as a main control unit in industrial HMI panels requiring real-time sensor acquisition, local display driving via parallel LCD interface, and fieldbus connectivity.

For engineers reviewing the STM32F101RGT6 datasheet, STM32F101RGT6 pinout, STM32F101RGT6 application, or STM32F101RGT6 equivalent, key selection criteria include Flash/SRAM size for firmware scalability, dual-bank Flash for safe over-the-air updates, 5 V-tolerant I/Os for legacy bus interfacing, RTC with VBAT backup for time-critical logging, and CAN 2.0B support for industrial network integration.

Technical Context

The STM32F101RGT6 implements a tightly coupled ARM Cortex-M3 core with Memory Protection Unit (MPU), enabling deterministic real-time execution and memory isolation for safety-aware applications. Its clock system integrates four oscillators - 4–16 MHz HSE, 32.768 kHz LSE, 8 MHz HSI, and 40 kHz LSI - feeding a programmable PLL to generate precise system clocks up to 36 MHz.

Peripheral architecture features a flexible static memory controller (FSMC) supporting NOR/PSRAM/NAND and CompactFlash, plus an 8080/6800-mode parallel LCD interface for direct connection to monochrome or color segment/TFT displays without external controllers. The 12-channel DMA controller offloads data movement from CPU across ADC, DAC, SPI, I²C, and USART peripherals.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK® construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit ARM Cortex-M3 microcontroller applications.

Compared with STM32F103RGT6, the STM32F101RGT6 trades USB OTG for CAN 2.0B while retaining identical packaging and toolchain compatibility; versus STM32F072RBT6, it delivers 2.25× higher DMIPS/MHz, 4.8× more SRAM, and hardware support for external memory and display - justifying its use in feature-rich embedded HMI systems.

Availability

STM32F101RGT6 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, factory automation nodes, and medical diagnostic sensor hubs requiring stable component supply across multi-year production cycles.

Supply support for STM32F101RGT6 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, MEMS sensors, and automotive-grade components since 1987.

The STM32F101xx series belongs to ST's Access Line - optimized for cost-sensitive industrial and consumer applications requiring balanced performance, rich analog integration, and robust peripheral sets without advanced connectivity like Ethernet or high-speed USB.

FAQ

Does STM32F101RGT6 support USB device mode without external PHY?

Yes. STM32F101RGT6 integrates a full-speed USB 2.0 transceiver on-chip. Pins PA11 (D−) and PA12 (D+) connect directly to a USB Type-A receptacle with appropriate ESD protection and 1.5 kΩ pull-up resistor on D+, eliminating need for external PHY. Firmware must implement USB device stack (e.g., STM32Cube USB Device Library).

What is the maximum operating temperature for reliable RTC operation with VBAT?

The RTC maintains accuracy within ±1.5 ppm over −40 °C to +85 °C when powered by VBAT (1.8–3.6 V) and using the 32.768 kHz LSE crystal on PC14/PC15. Calibration register (RTC_CALR) allows software trimming to compensate for crystal aging or temperature drift, extending usable range to +105 °C in buffered VBAT configurations.

Can the FSMC interface drive a 16-bit NOR flash in asynchronous non-multiplexed mode?

Yes. FSMC supports 8-/16-bit asynchronous NOR flash in non-multiplexed mode with independent address and data buses. For 16-bit devices, use NE1 chip select with NADV disabled, configure Bank1 timing registers (FSMC_BTR1/BCR1) for address setup/hold, data latency, and access cycle per datasheet Table 31, and map flash to 0x60000000–0x6FFFFFFF.

How many I/O pins support external interrupt capability?

All 51 GPIO pins on STM32F101RGT6 can be configured as external interrupt sources via the EXTI peripheral. Each pin maps to one of 16 EXTI lines (e.g., PA0–PG0 → EXTI0); multiple pins per port share same line but are distinguishable in software via GPIO_IDR register reads after EXTI pending flag detection.