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Contents

README

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STM8S208S6T3C

STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · LQFP-44(10x10)

STM8S208S6T3C from STMicroelectronics, in a LQFP-44(10x10). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 NRST input Reset input pin, active low with internal pull-up resistor for device reset control.
2 PA1/OSCIN bidirectional Port A1 general-purpose I/O or high-speed external oscillator crystal input with floating input and slow output.
3 PA2/OSCOUT bidirectional Port A2 general-purpose I/O or high-speed external oscillator crystal output with floating input and slow output.
4 VSSIO_1 power_in I/O power supply ground return connection.
5 VSS power_in Digital power supply ground return connection.
6 VCAP passive 1.8 V internal regulator external capacitor pin, requires 1 µF capacitor with ESR < 0.5 Ω and ESL < 0.1 nH connected to ground.
7 VDD power_in Digital power supply input, operating voltage range 2.95 to 5.5 V.
8 VDDIO_1 power_in I/O power supply input for I/O ports.
9 PA4/UART1_RX bidirectional Port A4 high-sink general-purpose I/O with floating input and programmable output (slow default) or UART1 receive input.
10 PA5/UART1_TX bidirectional Port A5 high-sink general-purpose I/O with floating input and programmable output (slow default) or UART1 transmit output.
11 PA6/UART1_CK bidirectional Port A6 high-sink general-purpose I/O with floating input and programmable output (slow default) or UART1 synchronous clock.
12 VDDA power_in Analog power supply input for analog circuits including ADC.
13 VSSA power_in Analog power supply ground return for analog circuits.
14 PB7/AIN7 bidirectional Port B7 general-purpose I/O with floating input and slow output or analog input channel 7 to ADC.
15 PB6/AIN6 bidirectional Port B6 general-purpose I/O with floating input and slow output or analog input channel 6 to ADC.
16 PB5/AIN5 bidirectional Port B5 general-purpose I/O with weak pull-up and slow output, analog input 5, or I2C_SDA alternate function.
17 PB4/AIN4 bidirectional Port B4 general-purpose I/O with weak pull-up and slow output, analog input 4, or I2C_SCL alternate function.
18 PB3/AIN3 bidirectional Port B3 general-purpose I/O with weak pull-up and slow output, analog input 3, or TIM1_ETR alternate function.
19 PB2/AIN2 bidirectional Port B2 general-purpose I/O with weak pull-up and slow output, analog input 2, or TIM1_CH3N alternate function.
20 PB1/AIN1 bidirectional Port B1 general-purpose I/O with weak pull-up and slow output, analog input 1, or TIM1_CH2N alternate function.
21 PB0/AIN0 bidirectional Port B0 general-purpose I/O with weak pull-up and slow output, analog input 0, or TIM1_CH1N alternate function.
22 PE6/AIN9 bidirectional Port E6 general-purpose I/O with weak pull-up and slow output or analog input channel 9 to ADC.
23 PE5/SPI_NSS bidirectional Port E5 general-purpose I/O with weak pull-up and slow output or SPI master/slave select input/output.
24 PC1/TIM1_CH1 bidirectional Port C1 high-sink general-purpose I/O with floating input and programmable output (slow default) or timer 1 channel 1 output.
25 PC2/TIM1_CH2 bidirectional Port C2 high-sink general-purpose I/O with floating input and programmable output (slow default) or timer 1 channel 2 output.
26 PC3/TIM1_CH3 bidirectional Port C3 high-sink general-purpose I/O with floating input and programmable output (slow default) or timer 1 channel 3 output.
27 PC5/SPI_SCK bidirectional Port C5 high-sink general-purpose I/O with floating input and programmable output (slow default) or SPI serial clock.
28 VSSIO_2 power_in I/O power supply ground return connection.
29 VDDIO_2 power_in I/O power supply input for I/O ports.
30 PC6/SPI_MOSI bidirectional Port C6 high-sink general-purpose I/O with floating input and programmable output (slow default) or SPI master out/slave in.
31 PC7/SPI_MISO bidirectional Port C7 high-sink general-purpose I/O with floating input and programmable output (slow default) or SPI master in/slave out.
32 PG0/CAN_TX bidirectional Port G0 general-purpose I/O with floating input and slow output or beCAN transmit output (STM8S208xx only).
33 PG1/CAN_RX bidirectional Port G1 general-purpose I/O with floating input and slow output or beCAN receive input (STM8S208xx only).
34 PE2/I2C_SDA bidirectional Port E2 true open-drain general-purpose I/O with slow output and no internal pull-up or I2C data line.
35 PE1/I2C_SCL bidirectional Port E1 true open-drain general-purpose I/O with slow output and no internal pull-up or I2C clock line.
36 PE0/CLK_CCO bidirectional Port E0 high-sink general-purpose I/O with floating input and programmable output (slow default) or configurable clock output.
37 PD0/TIM3_CH2 bidirectional Port D0 high-sink general-purpose I/O with floating input and programmable output (slow default) or timer 3 channel 2 output.
38 PD1/SWIM bidirectional Port D1 high-sink general-purpose I/O with floating input and programmable output (fast default) or SWIM debug interface.
39 PD2/TIM3_CH1 bidirectional Port D2 high-sink general-purpose I/O with floating input and programmable output (slow default) or timer 3 channel 1 output.
40 PD3/TIM2_CH2 bidirectional Port D3 high-sink general-purpose I/O with floating input and programmable output (slow default) or timer 2 channel 2 output.
41 PD4/TIM2_CH1 bidirectional Port D4 high-sink general-purpose I/O with floating input and programmable output (slow default), timer 2 channel 1 output, or beeper output.
42 PD5/UART3_TX bidirectional Port D5 general-purpose I/O with floating input and slow output or UART3 transmit output.
43 PD6/UART3_RX bidirectional Port D6 general-purpose I/O with floating input and slow output or UART3 receive input.
44 PD7/TLI bidirectional Port D7 general-purpose I/O with floating input and slow output, top level interrupt input, or timer 1 channel 4 output.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package LQFP-44(10x10)
Category Embedded Processors & Controllers
Pins 44

CAD (KiCad official)

  • Symbol: STM8S208S6T3C
  • Footprint: Package_QFP:LQFP-44_10x10mm_P0.8mm
  • 3D model: LQFP-44(10x10) (KiCad packages3D, STEP)
  • 3D model files: stm8s208s6t3c-etched.step / stm8s208s6t3c-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm8s208s6t3c.step / stm8s208s6t3c.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: STMicroelectronics datasheet (117 pp, sha256 7adeaa849cf9e22f, retrieved 2026-10-01, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF