STM8S105C4T6 Detailed explanation of pin function specifications and circuit principle instructions

The model "STM8S105C4T6" is from STMicroelectronics, a well-known manufacturer of microcontrollers. This particular microcontroller belongs to the STM8 series of 8-bit microcontrollers. The "STM8S" family is designed for a wide range of applications, offering a good balance between performance and cost-efficiency, making it popular in automotive, industrial, and consumer applications.

Package Type for STM8S105C4T6:

The model STM8S105C4T6 comes in the LQFP-32 (Low-profile Quad Flat Package) form factor. This means it has 32 pins. Here’s a detailed explanation of the pin functions for the STM8S105C4T6 microcontroller, along with a FAQ for common queries related to the pins.

Pin Function Table (32 Pins):

Below is a detailed explanation of all 32 pins and their respective functions.

Pin Number Pin Name Function Description 1 PA0 Analog Input (ADC) / Digital Input/Output (GPIO) 2 PA1 Analog Input (ADC) / Digital Input/Output (GPIO) 3 PA2 Analog Input (ADC) / Digital Input/Output (GPIO) 4 PA3 Analog Input (ADC) / Digital Input/Output (GPIO) 5 PA4 Digital I/O / SPI (Serial Peripheral Interface) MISO (Master In Slave Out) 6 PA5 Digital I/O / SPI (Serial Peripheral Interface) SCK (Serial Clock ) 7 PA6 Digital I/O / TIM (Timer) Channel 1 8 PA7 Digital I/O / USART (Universal Synchronous Asynchronous Receiver-Transmitter) TX (Transmit) 9 PB0 Digital I/O / USART RX (Receiver) 10 PB1 Digital I/O / TIM (Timer) Channel 2 11 PB2 Digital I/O / TIM (Timer) Channel 3 12 PB3 Digital I/O / SPI MOSI (Master Out Slave In) 13 PB4 Digital I/O / PWM Output 14 PB5 Digital I/O / I2C (Inter-Integrated Circuit) SDA (Data Line) 15 PB6 Digital I/O / I2C (Inter-Integrated Circuit) SCL (Clock Line) 16 PB7 Digital I/O / SPI (Serial Peripheral Interface) SCK 17 PC0 Analog Input (ADC) / Digital Input/Output (GPIO) 18 PC1 Analog Input (ADC) / Digital Input/Output (GPIO) 19 PC2 Analog Input (ADC) / Digital Input/Output (GPIO) 20 PC3 Analog Input (ADC) / Digital Input/Output (GPIO) 21 PC4 Analog Input (ADC) / Digital Input/Output (GPIO) 22 PC5 Analog Input (ADC) / Digital Input/Output (GPIO) 23 PC6 Digital I/O / External Interrupt Input 24 PC7 Digital I/O / External Interrupt Input 25 VSS Ground ( Power Supply Ground) 26 VDD Power Supply (Core and I/O Voltage) 27 NRST Reset Pin (Active low) 28 BOOT0 Boot Pin (Used to determine the boot mode) 29 OSC_IN Crystal Input (Connected to external crystal oscillator) 30 OSC_OUT Crystal Output (Connected to external crystal oscillator) 31 VCAP Internal capacitor Pin (For voltage regulator) 32 IOVSS Ground (For I/O voltage)

FAQ: Common Questions on STM8S105C4T6 Pin Functions

Q: What is the purpose of PA0 to PA3 pins on STM8S105C4T6? A: These are analog input pins that are also capable of serving as digital input/output pins. They can be connected to the ADC module for analog-to-digital conversion. Q: What functionality does the PA4 pin serve? A: The PA4 pin is used for SPI communication as MISO (Master In Slave Out) and can also serve as a regular GPIO pin. Q: Can PA6 be used for timer functions? A: Yes, PA6 is connected to Timer 1, Channel 1, and can be used for PWM signal generation. Q: What is the function of PA7? A: PA7 serves as the USART (Universal Synchronous Asynchronous Receiver Transmitter) TX (Transmit) pin for serial communication. Q: How does PB0 function in STM8S105C4T6? A: PB0 is used for the USART RX (Receive) pin, handling serial data reception. Q: What is the role of PB1 and PB2 pins? A: These pins are used for Timer 3 channels and can be used to generate PWM signals. Q: What is the function of PB3 in STM8S105C4T6? A: PB3 is used for SPI communication as MOSI (Master Out Slave In) for data transmission. Q: How is PB5 used in the microcontroller? A: PB5 is used for I2C communication as SDA (Serial Data Line). Q: What does PB6 do on the STM8S105C4T6? A: PB6 is used as the clock line for I2C communication (SCL - Serial Clock Line).

Q: What is the purpose of PB7 in STM8S105C4T6?

A: PB7 is the SPI SCK (Serial Clock) pin and is used to provide the clock signal for SPI communication.

Q: What are PC0 to PC5 pins used for?

A: PC0 to PC5 are analog input pins for the ADC module. They can also be used as GPIO pins.

Q: How do the PC6 and PC7 pins function?

A: Both PC6 and PC7 are digital I/O pins that can be used as external interrupt inputs.

Q: What is the role of the VSS pin?

A: VSS is the ground pin, providing a common reference for the power supply and all signals.

Q: What does the VDD pin do?

A: VDD is the power supply pin, providing the core and I/O voltage to the microcontroller.

Q: What does the NRST pin control?

A: NRST is the active-low reset pin. When pulled low, it resets the microcontroller.

Q: What does the BOOT0 pin do?

A: The BOOT0 pin determines the boot mode of the microcontroller. It selects between different boot options, such as loading from Flash or external memory.

Q: What is the function of the OSCIN and OSCOUT pins?

A: OSCIN and OSCOUT are used to connect an external crystal oscillator to provide a clock source for the microcontroller.

Q: How is the VCAP pin used?

A: The VCAP pin connects to an internal capacitor, helping to stabilize the voltage regulator for the microcontroller’s core.

Q: What is the function of the IOVSS pin?

A: IOVSS is the ground pin for the I/O voltage, providing a common reference for I/O signals.

Q: How are the pins configured for analog functions?

A: Pins like PA0-PA3, PC0-PC5, and others can be configured as analog inputs by setting the appropriate control registers, allowing the microcontroller to perform ADC conversions.

This information provides the full list of pin functions for the STM8S105C4T6 model. For a deeper dive, you would typically consult the STM8S105C4 datasheet or reference manual for additional details like electrical characteristics, detailed configurations, and usage guidelines.