STMicroelectronics ST7FOXK1T6TR

Overview

ST7FOXK1T6TR from STMicroelectronics is an 8-bit Flash microcontroller featuring 4 KB XFlash program memory, 384 bytes RAM, integrated SPI and I²C interfaces, 10-bit ADC with up to 10 channels, and six timers including dual 12-bit auto-reload timers with PWM and dead-time generation. It operates across industrial temperature range (–40 °C to +85 °C) and supports In-Circuit Programming (ICP) and In-Application Programming (IAP) for field firmware updates in embedded control systems.

For engineers reviewing the ST7FOXK1T6TR datasheet, ST7FOXK1T6TR pinout, ST7FOXK1T6TR application, or ST7FOXK1T6TR equivalent, key selection considerations include its single-voltage Flash architecture, five low-power modes (Halt, Wait, Slow), internal 8 MHz RC oscillator with trimming, high-sink I/O capability (up to 8 pins), and LVD-based safe power-on/off sequencing in resource-constrained industrial and appliance designs.

Technical Context

The ST7FOXK1T6TR implements the ST7 CPU core with 63 basic instructions, 17 addressing modes, and hardware support for 8×8 unsigned multiply. Its interrupt system delivers 13 vectors plus TRAP and RESET, enabling deterministic real-time response in closed-loop control applications.

Peripheral integration includes a multimaster I²C interface compliant with standard/fast-mode timing, a full-duplex SPI supporting master/slave operation with configurable clock polarity and phase, and a 10-bit successive-approximation ADC with programmable sampling time and scan mode - all accessible via memory-mapped registers with dedicated interrupt vectors.

Key Specifications

Pinout & Package

LQFP32 package (7 × 7 mm, 0.8 mm pitch) with exposed thermal pad - suitable for compact PCB layouts requiring thermal efficiency and reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit Flash microcontroller applications.

Compared with STM8S003F3P6 and EFM8BB10F8G-A-QFN20, the ST7FOXK1T6TR uniquely combines IAP-capable XFlash, multimaster I²C, and five low-power modes in a 32-pin LQFP - making it optimal for cost-sensitive, updateable, and battery-aware embedded controllers where peripheral flexibility outweighs raw speed.

Availability

ST7FOXK1T6TR is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, smart lighting dimmers, and motorized valve controllers requiring stable component supply and long-term manufacturing continuity.

Supply support for ST7FOXK1T6TR 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.

The ST7 family was engineered for cost-effective, low-power 8-bit control in appliances and instrumentation - emphasizing Flash endurance, mixed-signal integration, and robustness in noisy environments.

FAQ

What is the maximum operating frequency of the ST7FOXK1T6TR?

The ST7FOXK1T6TR supports a maximum system clock frequency of 8 MHz using its internal trimmable RC oscillator. When driven by an external crystal or ceramic resonator, it operates up to 8 MHz with ±1% accuracy over temperature and voltage. The CPU executes instructions at 1–4 cycles per instruction, delivering up to 2 MIPS throughput.

Does the ST7FOXK1T6TR support hardware debug interfaces?

Yes, the ST7FOXK1T6TR integrates a 2-pin Debug Module (DM) compatible with ST's ST-LINK protocol. This allows full-speed in-circuit debugging, flash programming, and real-time variable inspection without requiring additional debug headers or JTAG adapters.

Can the internal RC oscillator be calibrated for improved accuracy?

Yes, the internal 8 MHz RC oscillator supports factory-trimmed calibration stored in option bytes, and users can perform custom calibration via the RC calibration control/status register (RCC_CSR). This achieves ±1% accuracy across –40 °C to +85 °C after trimming, eliminating need for external crystals in non-timing-critical applications.

What is the Flash endurance and data retention specification?

The ST7FOXK1T6TR guarantees 1,000 write/erase cycles for its 4 KB XFlash memory and 20 years of data retention at 55 °C. These specifications are validated per JEDEC standards and apply under recommended operating conditions - no special wear-leveling firmware is required for typical control firmware lifecycles.