STM8S-Blue Generic STM8S103F3P6 Development Board – Pinout Diagram & Pin Reference

Vector pinout diagram and pin reference for the STM8S103F3P6-based STM8S-Blue 8-bit microcontroller development board.
STM8S-Blue STM8S103F3P6 Microcontroller Development Board Pinout Diagram and Pin Reference Featured Image by CIRCUITSTATE Electronics

STM8S-Blue is a generic STM8S103F3P6 microcontroller development board available in the market. It is a minimum system development board that integrates a USB connector, a 3.3V voltage regulator, a reset button, and two LEDs in addition to the 20-pin microcontroller. STM8S103F3P6 is a low-cost 8-bit microcontroller from ST Microelectronics. On this page, you will find a vector pinout diagram for the STM8S-Blue board. The name of the board is not official, but a generic one. People call it the blue board since the color of the PCB is blue.

Features

STM8S-Blue STM8S103F3P6 Generic Microcontroller Development Board Top and Bottom Views by CIRCUITSTATE Electronics
STM8S-Blue board top and bottom views
SpecificationValue
CPUSTM8S103F3P6
SeriesSTM8S
Clock16 MHz (Internal)
Flash8 kB
RAM1 kB
EEPROM640 bytes
I/O voltage3.3V
GPIO14
Interface portsUART, SPI, I2C
PWM4 (up to 7 via alternate mapping)
ADC5-channel, 10-bit
LEDPB5 (Arduino D3), active low, shared with I2C, red
Program/Debug InterfaceSWIM
USBMicro-USB (power only)
Dimensions18 x 30 mm
STM8S-Blue board features

Schematic

We could not find an accurate schematic diagram of the STM8S-Blue board on the internet. We created one ourselves using KiCad. The schematic is based on the exact STM8S-Blue we have. You can download the schematic as an image, PDF, or the KiCad source file.

STM8S-Blue STM8S103F3P6 Generic Development Board Schematic Diagram R0.1 by CIRCUITSTATE Electronics
STM8S-Blue schematic diagram. Click for a high-resolution.
  1. STM8S-Blue Board Schematic Diagram R0.1 [PDF]
  2. STM8S-Blue Board Schematic – KiCad File [ZIP]

Pinout Diagram

Latest Revision: Rev 0.1, 09-10-2023
Design by: Vishnu Mohanan
License: CC-BY-SA 4.0

There are no official references for the pinout of STMS-Blue. Since these boards come mainly from no-name manufacturers in China, there is no guarantee of pinout compatibility or product quality. We used the boards we already have as the reference for creating these pinouts. While we try our best to be accurate and up-to-date here, we can not guarantee correctness. We have seen boards with conflicting pinouts and pin labels. So please also double-check the pin assignments with that from the official documentation. If you find any errors, please let us know in the comments.

PNG

STM8S-Blue Generic STM8S103F3P6 Microcontroller Board Pinout Diagram Revision 0.1 by CIRCUITSTATE Electronics
STM8S-Blue board pinout diagram. Click for a high-resolution image.

PDF

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Pin Reference

STM8S103F3P6 TSSOP-20 Microcontroller IC Pinout
STM8S103F3P6 TSSOP-20 pintout. Source: ST Microelectronics
Pin #GPIOHigh SinkSpeedMain Alt. FunctionAlt. Function
1PD4HSO3BEEP/TIM2_CH1/UART1_CK
2PD5HSO3AIN5/UART1_TX
3PD6HSO3AIN6/UART1_RX
5PA1O1OSCIN
6PA2O1OSCOUT
10PA3HSO3TIM2_CH3 SPI_CS (AFR1)
11PB5XO112C_SDATIM1_ BKIN (AFR4)
12PB4XO112C_SCLADC_ETR (AFR4)
13PC3HSO3TIM1_CH3TLI (AFR3), TIM1_ CH1N (AFR7)
14PC4HSO3 CLK_CCO/TIM1_CH4/AIN2TIM1_CH2N (AFR7)
15PC5HSO3SPI_SCKTIM2_CH1 (AFR0)
16PC6HSO3SPI_COPITIM1_CH1 (AFR0)
17PC7HSO3SPI_CIPOTIM1_CH2 (AFR0)
18PD1HSO4SWIM
19PD2HSO3AIN3TIM2_CH3 (AFR1)
20PD3HSO3AIN4/TIM2_CH2/ADC_ETR
  1. Only GPIO pins are shown.
  2. Default function of all GPIO pins after reset is port GPIO.
  3. – Not applicable
  4. X – Not available
  5. Ox – Speed Class
    • O1 – Slow (up to 2 MHz)
    • O2 – Fast (up to 10 MHz)
    • O3 – Fast/slow programmability with slow as default state after reset
    • O4 – Fast/slow programmability with fast as default state after reset
  1. STM8S103F3P6 – Product Page
  2. Generic STM8S103 Breakout Board – Sduino
  3. STM8S-Blue – Buy from Robu
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Vishnu Mohanan

Vishnu Mohanan

Founder and CEO at CIRCUITSTATE Electronics

Articles: 84

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