STMicroelectronics STM32F070F6P6

Overview

STM32F070F6P6 from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller in TSSOP20 package, featuring 32 KB flash, 6 KB SRAM with hardware parity, USB 2.0 Full-Speed interface, and 12-bit ADC (1.0 µs conversion time). It operates from 2.4–3.6 V and supports low-power Stop/Standby modes with RTC alarm and periodic wakeup-used in USB-powered sensor nodes and industrial control edge devices.

For engineers reviewing the STM32F070F6P6 datasheet, STM32F070F6P6 pinout, STM32F070F6P6 application, or STM32F070F6P6 equivalent, key selection criteria include USB FS integration without external PHY, 5V-tolerant I/O count (up to 19 pins), 48 MHz max CPU frequency, and TSSOP20 footprint suitability for space-constrained PCB layouts.

Technical Context

The STM32F070F6P6 implements a single-cycle Cortex-M0 core with integrated NVIC, SysTick, and SWD debug interface. Its clock system combines internal 8 MHz RC (with x6 PLL) and external 4–32 MHz crystal support, enabling precise USB timing via dedicated 48 MHz PLL output.

Peripherals are memory-mapped and share APB1/APB2 buses: USB FS controller uses dedicated DMA channel; ADC connects to 16 input channels with temperature sensor and VREFINT; TIM1 provides six-channel PWM for motor control, while TIM3/TIM14–TIM17 deliver IC/OC and IR decoding capability.

Key Specifications

Pinout & Package

TSSOP20 (YA) package: 20-pin thin shrink small-outline package, 6.4 × 4.4 mm body, 0.65 mm pitch, ECOPACK2-compliant. Pinout validated per DS10697 Rev 4 Figure 3 and Table 10.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F070F6P6, the F042F4P6 sacrifices USB functionality for lower cost and smaller code size, while the F070C6T6 trades compactness for expanded I/O and peripheral headroom - making the F6P6 optimal for USB-integrated, space-constrained edge nodes.

Availability

STM32F070F6P6 is available at Aetrix Electronics and suitable for USB HID devices, battery-powered sensor nodes, smart lighting controllers, and USB-C adapter monitors requiring stable component supply and long-term manufacturability.

Supply support for STM32F070F6P6 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, specializing in microcontrollers, power management, and automotive ICs with strong industrial and consumer market presence.

The STM32F0 series targets cost-sensitive, resource-efficient embedded applications-designed for rapid development of USB-connected, low-power edge devices with minimal external components.

FAQ

Does STM32F070F6P6 support USB device enumeration without external crystal?

Yes. The internal 48 MHz PLL can be driven by the 8 MHz HSI RC oscillator, enabling full USB FS enumeration without an external crystal. However, USB specification requires ±0.25% clock accuracy, so ST recommends using the 48 MHz PLL with HSE for production-grade compliance - the HSI-based mode is suitable for prototyping and non-certified applications.

What is the maximum ADC sampling rate achievable with DMA and continuous mode?

At 14 MHz ADC clock (derived from APB2), the STM32F070F6P6 achieves 1 MSPS (1 million samples per second) in continuous conversion mode with DMA. This requires configuring the ADC prescaler to divide APB2 clock (48 MHz) by 3.43 → ~14 MHz, and enabling scan mode across up to 16 channels with DMA circular buffer.

Can PA11/PA12 be used as general-purpose I/O when USB is disabled?

No. PA11 (DM) and PA12 (DP) are permanently dedicated to USB functionality and cannot be remapped to GPIO alternate functions. They retain USB transceiver circuitry even when USB peripheral clock is disabled - using them as generic I/O may cause signal integrity issues or damage during USB activity.

How does the RTC maintain time accuracy in Stop mode with VDD removed?

The RTC continues operating in Stop mode only when VDD is present and VDDA ≥ 2.4 V; it does not function in Standby mode without backup power. For true battery-backed RTC, an external VBAT supply must be connected to the VBAT pin - the internal LSE oscillator (32.768 kHz) remains active and drives RTC calendar registers with ±25 ppm accuracy at 25°C.