STM32F103 RCT6 Detailed explanation of pin function specifications and circuit principle instructions

The STM32F103RCT6 is a microcontroller manufactured by STMicroelectronics, which is part of their STM32 series. This series is widely known for its ARM Cortex-M3 processor core, making it suitable for a variety of embedded applications.

1. Package and Pinout:

The STM32F103RCT6 microcontroller uses the LQFP-64 (Low-profile Quad Flat Package) with 64 pins. This package provides a compact form factor while maintaining a high pin count for interfacing with various peripherals.

2. Pin Function and Specifications:

Here is the detailed list of functions for each pin of the STM32F103RCT6. The pinout of the LQFP-64 package is defined in a way that each pin serves multiple purposes depending on the system configuration. Below is an outline of the functions:

Pin Pin Name Function/Description 1 VSS Ground pin for Power supply 2 VDD Power supply pin (+3.3V) 3 NRST Reset pin (active low) 4 PA0 General-purpose I/O pin, can be used as ADC input, TIM2CH1, or USART2TX 5 PA1 General-purpose I/O pin, can be used as ADC input, TIM2CH2, or USART2RX 6 PA2 General-purpose I/O pin, can be used as ADC input, TIM2CH3, or USART2CK 7 PA3 General-purpose I/O pin, can be used as ADC input, TIM2CH4, or USART2CTS 8 PA4 General-purpose I/O pin, can be used as ADC input, SPI1_NSS 9 PA5 General-purpose I/O pin, can be used as ADC input, SPI1_SCK 10 PA6 General-purpose I/O pin, can be used as ADC input, SPI1_MISO 11 PA7 General-purpose I/O pin, can be used as ADC input, SPI1_MOSI 12 PB0 General-purpose I/O pin, can be used as USART1CK, SPI2NSS 13 PB1 General-purpose I/O pin, can be used as USART1TX, SPI2SCK 14 PB2 General-purpose I/O pin, can be used as USART1RX, SPI2MISO 15 PB3 General-purpose I/O pin, can be used as USART1RTS, SPI2MOSI 16 PB4 General-purpose I/O pin, can be used as I2C1_SCL 17 PB5 General-purpose I/O pin, can be used as I2C1_SDA 18 PB6 General-purpose I/O pin, can be used as I2C1_SCL 19 PB7 General-purpose I/O pin, can be used as I2C1_SDA 20 PC0 General-purpose I/O pin, can be used as ADC input 21 PC1 General-purpose I/O pin, can be used as ADC input 22 PC2 General-purpose I/O pin, can be used as ADC input 23 PC3 General-purpose I/O pin, can be used as ADC input 24 PC4 General-purpose I/O pin, can be used as ADC input 25 PC5 General-purpose I/O pin, can be used as ADC input 26 PC6 General-purpose I/O pin, can be used as USART1_TX 27 PC7 General-purpose I/O pin, can be used as USART1_RX 28 PD0 General-purpose I/O pin, can be used as USART2_TX 29 PD1 General-purpose I/O pin, can be used as USART2_RX 30 PD2 General-purpose I/O pin, can be used as USART2_CK 31 PD3 General-purpose I/O pin, can be used as USART2_CTS 32 PD4 General-purpose I/O pin, can be used as SPI1_NSS 33 PD5 General-purpose I/O pin, can be used as SPI1_SCK 34 PD6 General-purpose I/O pin, can be used as SPI1_MISO 35 PD7 General-purpose I/O pin, can be used as SPI1_MOSI 36 PD8 General-purpose I/O pin, can be used as USART1_RTS 37 PD9 General-purpose I/O pin, can be used as USART1_CTS 38 PD10 General-purpose I/O pin, can be used as TIM1_CH1 39 PD11 General-purpose I/O pin, can be used as TIM1_CH2 40 PD12 General-purpose I/O pin, can be used as TIM1_CH3 41 PD13 General-purpose I/O pin, can be used as TIM1_CH4 42 PD14 General-purpose I/O pin, can be used as TIM1_ETR 43 PD15 General-purpose I/O pin, can be used as TIM1_BKIN 44 PE0 General-purpose I/O pin, can be used as ADC input 45 PE1 General-purpose I/O pin, can be used as ADC input 46 PE2 General-purpose I/O pin, can be used as ADC input 47 PE3 General-purpose I/O pin, can be used as ADC input 48 PE4 General-purpose I/O pin, can be used as ADC input 49 PE5 General-purpose I/O pin, can be used as ADC input 50 PE6 General-purpose I/O pin, can be used as ADC input 51 PE7 General-purpose I/O pin, can be used as ADC input 52 PE8 General-purpose I/O pin, can be used as ADC input 53 PE9 General-purpose I/O pin, can be used as ADC input 54 PE10 General-purpose I/O pin, can be used as ADC input 55 PE11 General-purpose I/O pin, can be used as ADC input 56 PE12 General-purpose I/O pin, can be used as ADC input 57 PE13 General-purpose I/O pin, can be used as ADC input 58 PE14 General-purpose I/O pin, can be used as ADC input 59 PE15 General-purpose I/O pin, can be used as ADC input 60 VCAP Capacitor pin for voltage regulator 61 VDD Power supply pin (+3.3V) 62 VSS Ground pin for power supply 63 BOOT0 Boot mode select pin (used to select boot from Flash or System Memory ) 64 BOOT1 Boot mode select pin (used in combination with BOOT0)

3. Pin Functions Overview:

Each pin on the STM32F103RCT6 can serve multiple functions, including:

GPIO (General Purpose I/O): Pins can be configured as input, output, or alternate functions like UART, SPI, I2C, PWM, etc. Analog/Digital Inputs: Several pins are used for analog-to-digital conversion (ADC) inputs. Timers (TIM): Many pins can be used for timers, such as PWM outputs and timer capture/compare. Serial Communication : Some pins serve as UART, SPI, or I2C interface s.

4. Frequently Asked Questions (FAQ):

What is the operating voltage range for STM32F103RCT6? The STM32F103RCT6 operates with a supply voltage range of 2.0V to 3.6V. How many GPIO pins does STM32F103RCT6 have? The STM32F103RCT6 has 64 pins, with several serving as GPIO. Can I use the STM32F103RCT6 for UART communication? Yes, the microcontroller has USART1 and USART2 that can be used for UART communication. How do I configure a pin as a PWM output? PWM output can be configured on pins connected to timers (e.g., TIM1, TIM2). What is the maximum clock frequency of STM32F103RCT6? The STM32F103RCT6 can operate at a maximum clock frequency of 72 MHz. Is STM32F103RCT6 suitable for low-power applications? Yes, the microcontroller includes various power-saving modes. Does STM32F103RCT6 have a built-in ADC? Yes, STM32F103RCT6 has a 12-bit ADC that can be used for analog input measurements. What is the maximum ADC resolution of STM32F103RCT6? The ADC provides a resolution of 12 bits. Can I use STM32F103RCT6 for USB communication? The STM32F103RCT6 has a USB 2.0 full-speed device interface for USB communication. Does STM32F103RCT6 have external interrupt support? Yes, it supports external interrupts on several pins for real-time event handling. What is the maximum current source/sink capacity for I/O pins? Each I/O pin can sink or source a maximum of 20mA. Can STM32F103RCT6 support I2C communication? Yes, it supports I2C communication via pins like PB6 and PB7 for I2C1. Is there a bootloader available for STM32F103RCT6? Yes, STM32F103RCT6 has a built-in bootloader for easy firmware updates. What kind of timers are available in STM32F103RCT6? It has several timers, including basic timers, general-purpose timers, and advanced-control timers. What is the function of the NRST pin? The NRST pin is the reset pin used to reset the microcontroller. Does STM32F103RCT6 support SPI? Yes, it supports SPI communication on pins like PA5 (SPI1SCK), PA6 (SPI1MISO), and PA7 (SPI1_MOSI). What is the function of the BOOT0 pin? The BOOT0 pin determines the boot mode (from Flash or System Memory). Does STM32F103RCT6 have an external oscillator? Yes, it supports external oscillators for clock input. How many I/O pins are available for the user? The STM32F103RCT6 has around 56 user-configurable I/O pins. How do I configure a pin as input? Pins can be configured as inputs using the GPIO registers, specifying the input mode (floating, pull-up, pull-down).

Conclusion:

The STM32F103RCT6 offers a comprehensive set of features for embedded applications. With its 64 pins and rich I/O capabilities, it can be used for various digital, analog, and communication functions in a wide range of embedded projects.