STMicroelectronics STM8S207R8T3

Overview

STM8S207R8T3 from STMicroelectronics is an 8-bit high-performance microcontroller featuring a Harvard-architecture STM8 core, 24 MHz max CPU frequency, 64 KB Flash, 2 KB data EEPROM, 10-bit ADC with 16 channels, two UARTs (one CAN-capable), SPI, I²C, and advanced timer peripherals including TIM1 with dead-time insertion. It targets automotive body electronics, industrial control panels, and smart sensor nodes requiring robust CAN communication and low-power operation.

For engineers reviewing the STM8S207R8T3 datasheet, STM8S207R8T3 pinout, STM8S207R8T3 application, or STM8S207R8T3 equivalent, key selection criteria include CAN 2.0B compliance, SWIM single-wire debug interface, LQFP64 package compatibility, 2.95–5.5 V supply range, and integrated EEPROM endurance of 300 kcycles - all critical for cost-sensitive, long-lifecycle embedded designs.

Technical Context

The STM8S207R8T3 implements a 3-stage pipelined Harvard-architecture core with extended instruction set and nested interrupt controller supporting 32 interrupts and up to 37 external IRQs across 6 vectors. Its clock system integrates trimmable 16 MHz RC, low-power 128 kHz RC, crystal oscillator, and clock security monitor.

Peripheral integration includes beCAN 2.0B at 1 Mbit/s, dual UARTs (UART1 with LIN 2.1 master/slave and automatic resync), SPI up to 10 Mbit/s, I²C up to 400 kbit/s, and a 16-bit advanced control timer (TIM1) with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion - enabling precise motor control and power conversion timing.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, with 54 general-purpose I/Os including 18 high-sink outputs (up to 20 mA sink per pin), NRST, SWIM, and dedicated CANH/CANL pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8S207M8T6, the STM8S207R8T3 trades I/O count and Flash capacity for compact LQFP64 packaging and lower unit cost; versus STM8AF5288, it sacrifices automotive qualification for broader industrial availability and faster lead times.

Availability

STM8S207R8T3 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC modules, smart HVAC nodes, and home appliance motor controllers requiring stable component supply across multi-year production cycles.

Supply support for STM8S207R8T3 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM8S series targets cost-sensitive, high-reliability 8-bit embedded applications where CAN connectivity, EEPROM integration, and ultra-low-power modes are essential - balancing performance, peripheral richness, and production readiness.

FAQ

Does STM8S207R8T3 support CAN FD?

No. The STM8S207R8T3 integrates only classic beCAN 2.0B (ISO 11898-1), supporting up to 1 Mbit/s with standard and extended identifiers. It lacks CAN FD features such as flexible data-rate, enhanced payload length, and CRC improvements. For CAN FD, consider ST's SPC5 or STM32G4 series.

What is the maximum ADC sampling rate achievable?

The 10-bit ADC supports up to 1 Msps (mega-samples per second) in continuous conversion mode with single-channel input. With 16-channel scanning and auto-triggering from TIM1/TRGO, effective throughput drops to ~62.5 kSPS per channel due to acquisition time and conversion latency.

Can the internal 16 MHz RC oscillator be used for CAN timing?

No. beCAN requires clock accuracy better than ±1% over temperature and voltage; the factory-trimmed 16 MHz RC has ±2% tolerance. CAN must use either the external crystal oscillator (HSE) or the high-speed external clock input (HSE bypass mode) to meet bit-timing requirements.

Is SWIM compatible with standard ST-LINK debuggers?

Yes. ST-LINK/V2 and ST-LINK/V2-1 adapters fully support SWIM protocol for programming and debugging STM8S207R8T3. No additional hardware is needed - only a 4-pin SWIM connector (VDD, GND, SWIM, NRST) is required for full functionality.