STMicroelectronics STM8S207R8T6

Overview

STM8S207R8T6 from STMicroelectronics is an 8-bit high-performance MCU featuring a Harvard-architecture core, 24 MHz max CPU frequency (0 wait states ≤16 MHz), 64 KB Flash, 2 KB data EEPROM, 6 KB RAM, integrated CAN 2.0B controller, dual UARTs with LIN support, SPI, I²C, and 10-bit ADC with 16 channels - deployed in automotive body control modules requiring deterministic real-time response and robust serial networking.

For engineers reviewing the STM8S207R8T6 datasheet, STM8S207R8T6 pinout, STM8S207R8T6 application, or STM8S207R8T6 equivalent, key selection criteria include CAN bus timing compliance, SWIM debug interface availability, high-sink I/O capability (18 pins), low-power active-halt mode current (<1.5 µA @ 3.3 V), and LQFP64 package thermal performance for convection-cooled automotive ECUs.

Technical Context

The STM8S207R8T6 implements a 3-stage pipelined Harvard architecture with extended instruction set and nested interrupt controller supporting 32 interrupts and up to 37 external IRQs across 6 vectors. Its clock system integrates user-trimmable 16 MHz RC, low-power 128 kHz RC, and crystal oscillator with clock security monitor.

Peripheral integration includes beCAN 2.0B at 1 Mbit/s with automatic retransmission and error handling, two 16-bit general-purpose timers (TIM2/TIM3) with capture/compare/PWM, and TIM1 - a 16-bit advanced timer with dead-time insertion, complementary outputs, and synchronization - enabling precise motor control and power conversion timing.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature grade (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8S207M8T6, the R8T6 offers optimized cost and size for mid-tier automotive modules; versus STM8L152R8T6, it delivers CAN-enabled real-time control at higher voltage and current drive - critical for actuator interfacing where ultra-low power is secondary to bus reliability.

Availability

STM8S207R8T6 is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control interfaces, smart energy metering subsystems, and medical infusion pump controllers requiring stable component supply across extended product lifecycles.

Supply support for STM8S207R8T6 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, sensors, and automotive-grade silicon for industrial and automotive markets.

The STM8S Performance line targets cost-sensitive, high-reliability embedded applications demanding CAN connectivity, robust I/O, and long-term supply stability - especially in automotive body electronics and industrial automation.

FAQ

Does STM8S207R8T6 support in-application programming (IAP) of Flash memory?

Yes. The device supports IAP via its embedded bootloader and dedicated Flash programming registers. Firmware can erase and rewrite Flash sectors (minimum 128-byte pages) while executing from other memory regions, enabling field upgrades without external programmers. Full IAP requires disabling interrupts during critical write sequences and verifying CRC post-write.

What is the maximum achievable CAN bit rate and what conditions affect it?

The beCAN peripheral supports up to 1 Mbit/s nominal bit rate. Achievable rate depends on bus length, termination, transceiver propagation delay, and configured sample point (programmable between 50–87.5%). At 1 Mbit/s, recommended bus length is ≤40 m with proper 120 Ω termination and low-jitter transceivers like TJA1042T/3.

How does the SWIM interface handle debug access during low-power modes?

SWIM remains accessible in Wait and Active-Halt modes but is disabled in Halt mode. In Active-Halt, the debug module retains state and resumes communication immediately upon wake-up; no re-initialization is required. This enables low-power monitoring and breakpoint-triggered wake-up for energy-aware development.

Can the internal 16 MHz RC oscillator meet timing requirements for UART or CAN without calibration?

No. Uncalibrated 16 MHz RC has ±10% tolerance - insufficient for UART (requires ≤2% error) or CAN (≤1% for 1 Mbit/s). Factory-trimmed or user-calibrated RC achieves ±1% accuracy. Calibration uses SWIM or external reference clock and writes trim value to option bytes; required before deploying in timing-critical interfaces.