STMicroelectronics STM8S207SBT3C

Overview

STM8S207SBT3C from STMicroelectronics is an 8-bit high-performance microcontroller featuring a Harvard-architecture STM8 core, 24 MHz max CPU frequency, 128 KB Flash, 2 KB data EEPROM, 10-bit ADC with 16 channels, dual UARTs (one CAN-capable), SPI, I²C, and integrated CAN 2.0B controller - deployed in automotive body control modules for LIN/CAN gateway functions.

For engineers reviewing the STM8S207SBT3C datasheet, STM8S207SBT3C pinout, STM8S207SBT3C application, or STM8S207SBT3C equivalent, key selection considerations include CAN/LIN coexistence support, 68-pin LQFP package I/O count, SWIM single-wire debug interface, 2.95–5.5 V supply range, and industrial temperature grade (-40°C to +85°C) operation.

Technical Context

The STM8S207SBT3C implements a 3-stage pipelined Harvard-architecture core delivering up to 20 MIPS at 24 MHz, with nested interrupt controller supporting 32 interrupts and up to 37 external IRQ sources across 6 vectors. Its clock system integrates user-trimmable 16 MHz RC, low-power 128 kHz RC, and crystal oscillator with clock security monitoring.

Peripheral integration includes an advanced 16-bit TIM1 timer with dead-time insertion and complementary outputs for motor control, two 16-bit general-purpose timers (TIM2/TIM3), an 8-bit basic timer (TIM4), and beCAN 2.0B supporting 1 Mbit/s active communication - all independently clock-gatable for power optimization.

Key Specifications

Pinout & Package

LQFP80 (14 × 14 mm, 0.5 mm pitch) package with 68 usable I/O pins including 18 high-sink outputs (20 mA), robust against current injection, and SWIM debug pin multiplexed on PA1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8S207K8T3C, the STM8S207SBT3C provides full CAN I/O access and higher memory density in the same footprint family; versus STM8AF5288TAY, it trades automotive qualification for cost efficiency in non-powertrain applications.

Availability

STM8S207SBT3C is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, smart energy infrastructure, and medical device subsystems requiring stable component supply, long-term lifecycle support, and industrial-grade reliability.

Supply support for STM8S207SBT3C 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 analog devices for industrial, automotive, and consumer markets.

The STM8S series targets cost-sensitive, high-reliability embedded control applications - emphasizing integrated peripherals, low-power operation, and toolchain maturity for rapid development of automotive and industrial firmware.

FAQ

Does STM8S207SBT3C support in-application programming (IAP) of Flash memory?

Yes, the device supports IAP via its built-in bootloader and Flash programming interface. Users can reprogram Flash sectors while executing code from other sectors, enabling over-the-air or CAN-based firmware updates. The Flash memory controller includes write protection and erase suspend features to maintain real-time operation integrity during updates.

What is the maximum achievable baud rate for UART1 when using the internal 16 MHz RC oscillator?

With the trimmed 16 MHz RC oscillator, UART1 achieves ±1.5% baud rate error at 115.2 kbit/s and remains within ±2% up to 250 kbit/s - sufficient for LIN 2.1 master mode and standard automotive diagnostic protocols. For 1 Mbit/s CAN, the oscillator accuracy requirement is met via internal PLL stabilization, not UART timing.

Can the 10-bit ADC operate concurrently with CAN and UART peripherals without performance degradation?

Yes, the ADC operates independently using its own clock domain and DMA triggers. Conversion results can be transferred via DMA to memory without CPU intervention, while CAN message handling and UART framing occur in parallel - confirmed by ST's AN3128 application note on peripheral coexistence timing.

Is SWIM debugging supported through standard ST-LINK/V2 hardware, and what voltage levels are compatible?

Yes, SWIM is fully supported by ST-LINK/V2 and ST-LINK/V2-1 debug probes across the full 2.95–5.5 V supply range. The interface uses open-drain signaling with internal pull-up, eliminating level-shifter requirements - enabling direct connection to target boards powered at either 3.3 V or 5 V without adapter circuitry.