The STM8S903K3T6C is part of the STM8 family, which is a series of 8-bit microcontrollers manufactured by STMicroelectronics. This specific model belongs to the STM8S series, designed for applications requiring low Power , medium processing power, and reliable performance in embedded systems.
Package and Pin Configuration
The STM8S903K3T6C typically comes in a LQFP (Low-profile Quad Flat Package) or VFQFPN (Very Thin Quad Flat No-lead) package. The exact number of pins depends on the specific package variant chosen.
For this particular model, the T6C suffix corresponds to a 48-pin LQFP package. This means the device has 48 pins, each with specific functions. Below is a detailed breakdown of the pinout functions and their usage:
Pin Function Table for STM8S903K3T6C (48-pin LQFP package)
Pin Number Pin Name Function Description 1 VDD Power supply input (core voltage). Should be connected to the 3.3V or 5V supply, depending on system voltage. 2 VSS Ground pin, connects to system ground. 3 NRST Reset input pin, used to reset the microcontroller. 4 PA0 GPIO, input/output (can be configured as a digital I/O or alternate function, such as ADC input). 5 PA1 GPIO, input/output (can also be configured as ADC input). 6 PA2 GPIO, input/output (can also be configured as UART_TX for serial communication). 7 PA3 GPIO, input/output (can also be configured as UART_RX for serial communication). 8 PA4 GPIO, input/output (can be used as a SPI_MISO pin for SPI communication). 9 PA5 GPIO, input/output (can also be used as a SPI_SCK pin for SPI communication). 10 PA6 GPIO, input/output (can be used as an external interrupt or as a SPI_MOSI pin for SPI communication). 11 PA7 GPIO, input/output (can also be used as an I2C SDA line for I2C communication). 12 PB0 GPIO, input/output (can also be used as an I2C SCL line for I2C communication). 13 PB1 GPIO, input/output (can also be used as PWM output). 14 PB2 GPIO, input/output (can also be configured as a timer input). 15 PB3 GPIO, input/output (can also be used as SPI_CS for SPI communication). 16 PB4 GPIO, input/output (can also be used as an external interrupt). 17 PB5 GPIO, input/output (can also be used as external Clock input). 18 PB6 GPIO, input/output (can also be used as an external interrupt). 19 PB7 GPIO, input/output (can also be used as external interrupt). 20 PC0 GPIO, input/output (can also be configured as analog input). 21 PC1 GPIO, input/output (can also be configured as an analog input). 22 PC2 GPIO, input/output (can also be used for timer functionality). 23 PC3 GPIO, input/output (can also be used for timer functionality). 24 PC4 GPIO, input/output (can also be used as external interrupt). 25 PC5 GPIO, input/output (can also be used for PWM output). 26 PD0 GPIO, input/output (can also be used as an external interrupt or for timer functionality). 27 PD1 GPIO, input/output (can also be used for SPI_MISO or PWM output). 28 PD2 GPIO, input/output (can also be used for SPI_SCK or PWM output). 29 PD3 GPIO, input/output (can also be used for SPI_MOSI or PWM output). 30 PD4 GPIO, input/output (can also be used for I2C_SDA or external interrupt). 31 PD5 GPIO, input/output (can also be used for I2C_SCL or external interrupt). 32 PD6 GPIO, input/output (can also be used for timer or external clock input). 33 PD7 GPIO, input/output (can also be used for PWM output). 34 PE0 GPIO, input/output (can also be used as external interrupt). 35 PE1 GPIO, input/output (can also be used as external interrupt). 36 PE2 GPIO, input/output (can also be used for analog input or external clock input). 37 PE3 GPIO, input/output (can also be used for analog input). 38 PE4 GPIO, input/output (can also be used for external interrupt). 39 PE5 GPIO, input/output (can also be used for analog input or PWM output). 40 VSS Ground pin, connects to system ground. 41 VDD Power supply input (core voltage). Should be connected to the 3.3V or 5V supply, depending on system voltage. 42 SWDIO Serial Wire Debug I/O pin, used for debugging and programming. 43 SWCLK Serial Wire Clock, used for debugging and programming. 44 BOOT0 Boot mode selection pin, used to select the bootloader or normal operation mode. 45 USART1_RX UART Receive pin. 46 USART1_TX UART Transmit pin. 47 RESET Reset pin for the entire device. 48 GND Ground pin.Frequently Asked Questions (FAQ)
What is the supply voltage for the STM8S903K3T6C? The STM8S903K3T6C operates with a supply voltage of 3.3V or 5V. What is the maximum operating frequency for STM8S903K3T6C? The STM8S903K3T6C can operate up to 16 MHz. How many GPIO pins does STM8S903K3T6C have? STM8S903K3T6C has a total of 32 GPIO pins, distributed across multiple ports (PA, PB, PC, PD, PE). What is the maximum current that each GPIO pin can supply? Each GPIO pin can source or sink a maximum of 20mA. Does STM8S903K3T6C support I2C communication? Yes, the STM8S903K3T6C supports I2C communication via pins PB6 (SCL) and PB7 (SDA). How can I use PWM with STM8S903K3T6C? PWM can be generated via pins such as PB1, PB5, PD7, and PE5, depending on your timer configuration. Can STM8S903K3T6C be used for external interrupts? Yes, many of the GPIO pins, such as PA0, PA1, PA2, PB4, and others, support external interrupts. What is the function of the BOOT0 pin? The BOOT0 pin determines whether the device will enter the bootloader mode or run the user program. Can STM8S903K3T6C interface with external devices via SPI? Yes, STM8S903K3T6C supports SPI communication with pins such as PA4 (MISO), PA5 (SCK), PA6 (MOSI), and PB3 (CS).Is there a dedicated reset pin for STM8S903K3T6C?
Yes, the reset pin (NRST) is used to reset the microcontroller.Can STM8S903K3T6C be programmed via serial wire?
Yes, the STM8S903K3T6C supports programming via the Serial Wire Debug (SWD) interface.What is the role of the VDD and VSS pins?
VDD is the power supply input, and VSS is the ground reference pin for the device.Can STM8S903K3T6C be used for analog signal processing?
Yes, STM8S903K3T6C has dedicated analog input pins, such as PA0 and PA1.What is the function of the PA3 pin?
PA3 can be used as UART_RX for serial communication or as a general-purpose I/O pin.How do I configure the STM8S903K3T6C for UART communication?
Configure the USART1TX (PA2) and USART1RX (PA3) pins for UART communication.How many timers are available in STM8S903K3T6C?
The STM8S903K3T6C has several timers, including basic timers and advanced control timers for PWM.Can I use STM8S903K3T6C for low-power applications?
Yes, STM8S903K3T6C offers low-power modes, such as the sleep mode, for energy-efficient operation.What is the role of the NRST pin?
The NRST pin is used to reset the microcontroller, bringing it to a known state.What type of communication does STM8S903K3T6C support besides UART?
STM8S903K3T6C supports SPI, I2C, and UART communication protocols.What is the maximum temperature range for STM8S903K3T6C?
The STM8S903K3T6C can operate within a temperature range of -40°C to +125°C.This should give you a comprehensive understanding of the STM8S903K3T6C's features, pin functions, and answers to common questions. If you need more specific details or additional assistance, feel free to ask!
