STMicroelectronics STM32F102C6T6ATR

Overview

STM32F102C6T6ATR from STMicroelectronics is a low-density USB access line Arm® Cortex®-M3 microcontroller featuring 32 KB Flash, 6 KB SRAM, USB 2.0 Full-Speed interface, 48 MHz CPU clock, and integrated 12-bit ADC with temperature sensor-designed for compact embedded control systems requiring USB connectivity, real-time sensing, and low-power operation in industrial HMI and USB peripheral devices.

For engineers reviewing the STM32F102C6T6ATR datasheet, STM32F102C6T6ATR pinout, STM32F102C6T6ATR application, or STM32F102C6T6ATR equivalent, key selection considerations include USB FS timing compliance, 5 V-tolerant I/O count (37 pins), 16-channel ADC resolution and sampling rate, and LQFP48 package thermal performance under 85°C ambient conditions.

Technical Context

The STM32F102C6T6ATR implements an Arm Cortex-M3 core with Harvard architecture, single-cycle multiply/hardware divide, and nested vectored interrupt controller (NVIC) supporting up to 64 interrupts. Its clock system integrates dual oscillators (4–16 MHz HSE + 32.768 kHz LSE), PLL for USB-synchronized 48 MHz system clock, and factory-trimmed 8 MHz HSI RC source.

Peripheral integration includes one full-speed USB 2.0 transceiver with internal pull-ups, two USARTs with LIN/IrDA support, one SPI (12 Mbit/s), one I²C (SMBus/PMBus), five timers (two 16-bit general-purpose, two watchdogs, SysTick), and a 7-channel DMA controller servicing ADC, timers, and serial interfaces.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, ECOPACK® certified. Pin count and layout match STM32F102x6 series standard footprint for drop-in compatibility across density variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F042F6P6, the STM32F102C6T6ATR offers superior ADC performance and thermal sensing for sensor-centric designs; versus STM32F103C8T6, it trades CAN and memory headroom for lower cost and optimized USB-peripheral BOM simplicity.

Availability

STM32F102C6T6ATR is available at Aetrix Electronics and suitable for industrial USB dongles, smart sensor nodes, USB human interface devices, and embedded firmware updaters requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for STM32F102C6T6ATR 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, specializing in microcontrollers, power management, and automotive-grade ICs with vertical manufacturing and broad industrial certification coverage.

The STM32F102x6 product line targets cost-sensitive, USB-enabled embedded control applications-emphasizing integration of USB FS, robust analog peripherals, and low-power modes for battery-operated and industrial edge devices.

FAQ

Does STM32F102C6T6ATR support USB host functionality?

No. The STM32F102C6T6ATR integrates only a USB 2.0 Full-Speed device transceiver-not a host controller or OTG PHY. It operates exclusively as a USB peripheral (e.g., CDC, HID, or MSC device) and requires connection to a host PC or embedded host controller. USB host capability requires STM32 OTG-capable lines like F105/F107 or F4-series MCUs.

What is the maximum ADC sampling rate achievable with all 16 channels enabled?

With 16 channels scanned sequentially in continuous mode, the maximum aggregate sampling rate is 833 kSPS (1.2 µs per 12-bit conversion). This assumes no DMA overhead and minimal software intervention; actual sustained throughput drops to ~600 kSPS when using DMA to transfer results to SRAM due to bus arbitration and memory write latency.

Can PA11 and PA12 be used as general-purpose GPIOs when USB is disabled?

Yes. PA11 (USB DM) and PA12 (USB DP) function as standard 5 V-tolerant GPIOs when the USB peripheral clock is disabled and USB-related registers are not configured. However, internal pull-up/pull-down resistors remain active unless explicitly cleared via the GPIO configuration register (GPIOx_CRL/CRH), and USB-specific alternate functions must be deselected.

Is the internal temperature sensor calibrated at the factory?

Yes. The temperature sensor is factory-calibrated against reference temperatures at 25°C and 110°C, with calibration values stored in system memory (0x1FFFF7AC and 0x1FFFF7B0). Firmware must read these 16-bit values and apply linear interpolation using the ADC output to achieve ±1.5°C accuracy across –40°C to +85°C operating range.