STM32F105RBT6 Detailed explanation of pin function specifications and circuit principle instructions

The STM32F105RBT6 is part of the STM32 F1 series produced by STMicroelectronics, a well-known semiconductor manufacturer. The STM32F105RBT6 is a microcontroller that belongs to the STM32 family based on the ARM Cortex-M3 architecture.

Package Type

The STM32F105RBT6 comes in a LQFP-64 package, which means it has 64 pins in a square configuration.

Pin Function Specification

Below is a detailed explanation of the 64 pins of the STM32F105RBT6 microcontroller, their functions, and usage.

Pin Number Pin Name Pin Function 1 PA0 GPIO (General Purpose Input/Output) 2 PA1 GPIO, ADC1_IN1 (Analog-to-Digital Converter) 3 PA2 GPIO, USART2_TX (Universal Synchronous/Asynchronous Receiver-Transmitter) 4 PA3 GPIO, USART2_RX 5 PA4 GPIO, I2C1_SDA (I2C Data) 6 PA5 GPIO, SPI1_SCK (Serial Peripheral interface Clock ) 7 PA6 GPIO, SPI1_MISO (SPI Master In Slave Out) 8 PA7 GPIO, SPI1_MOSI (SPI Master Out Slave In) 9 PA8 GPIO, MCO (Microcontroller Output) 10 PB0 GPIO 11 PB1 GPIO, SPI1_NSS (SPI Chip Select) 12 PB2 GPIO, I2C1_SCL (I2C Clock) 13 PB3 GPIO, SPI1_SCK 14 PB4 GPIO, I2C1_SDA 15 PB5 GPIO, I2C1_SCL 16 PB6 GPIO, USART1_TX 17 PB7 GPIO, USART1_RX 18 PB8 GPIO, I2C2_SCL 19 PB9 GPIO, I2C2_SDA 20 PC0 GPIO, ADC1_IN10 21 PC1 GPIO, ADC1_IN11 22 PC2 GPIO, ADC1_IN12 23 PC3 GPIO, ADC1_IN13 24 PC4 GPIO, ADC1_IN14 25 PC5 GPIO, ADC1_IN15 26 PC6 GPIO 27 PC7 GPIO 28 PC8 GPIO, USART3_TX 29 PC9 GPIO, USART3_RX 30 PC10 GPIO, CAN_RX (Controller Area Network Receive) 31 PC11 GPIO, CAN_TX (Controller Area Network Transmit) 32 PD0 GPIO 33 PD1 GPIO 34 PD2 GPIO, USART3_RX 35 PD3 GPIO, USART3_TX 36 PD4 GPIO 37 PD5 GPIO 38 PD6 GPIO, SPI1_SCK 39 PD7 GPIO, SPI1_MISO 40 PD8 GPIO, SPI1_MOSI 41 PD9 GPIO 42 PD10 GPIO 43 PD11 GPIO 44 PD12 GPIO 45 PD13 GPIO 46 PD14 GPIO 47 PD15 GPIO 48 VDD Power Supply (3.3V or 5V depending on the system) 49 VSS Ground 50 NRST Reset Pin 51 BOOT0 Boot mode selection (used to select boot from Flash or system Memory ) 52 VBAT Backup Battery input 53 SWDIO Serial Wire Debug Input/Output 54 SWCLK Serial Wire Debug Clock 55 TMS Test Mode Select Pin (for debug) 56 TCK Test Clock Pin (for debug) 57 TRST Test Reset Pin (for debug) 58 PA15 GPIO, JTAG TDI (Test Data In for JTAG) 59 PB10 GPIO, JTAG TDO (Test Data Out for JTAG) 60 PB11 GPIO, JTAG TMS (Test Mode Select for JTAG) 61 PB12 GPIO, JTAG TCK (Test Clock for JTAG) 62 PB13 GPIO, JTAG TRST (Test Reset for JTAG) 63 PB14 GPIO, JTAG TDI (Test Data In for JTAG) 64 PB15 GPIO

Pin FAQ (Frequently Asked Questions)

Q1: What is the default clock frequency of the STM32F105RBT6? A1: The STM32F105RBT6 operates at a default clock frequency of up to 72 MHz.

Q2: How many GPIO pins are available on STM32F105RBT6? A2: The STM32F105RBT6 has 56 General Purpose Input/Output (GPIO) pins, out of which 64 pins are used.

Q3: What is the maximum voltage for VDD? A3: The maximum voltage for VDD is 3.6V.

Q4: Can I use STM32F105RBT6 in low-power applications? A4: Yes, STM32F105RBT6 has various low-power modes, such as Sleep, Stop, and Standby.

Q5: How many UART interfaces does STM32F105RBT6 support? A5: It supports 3 UART interfaces: USART1, USART2, and USART3.

Q6: Can the STM32F105RBT6 be used for motor control? A6: Yes, the STM32F105RBT6 supports motor control applications, especially with its advanced timers and PWM features.

Q7: Does STM32F105RBT6 support USB? A7: Yes, STM32F105RBT6 includes a USB 2.0 Full-Speed device interface.

Q8: How many ADC channels does STM32F105RBT6 have? A8: The STM32F105RBT6 has 16 analog-to-digital converter (ADC) channels.

Q9: Can STM32F105RBT6 be used in automotive applications? A9: Yes, STM32F105RBT6 is suitable for automotive applications with its extended temperature range and high reliability.

Q10: What is the power consumption of STM32F105RBT6? A10: The typical power consumption depends on the operational mode, but in active mode, it consumes around 40 mA at 72 MHz.

Q11: How many I2C interfaces does STM32F105RBT6 have? A11: STM32F105RBT6 supports 2 I2C interfaces (I2C1 and I2C2).

Q12: Can STM32F105RBT6 be programmed in-system? A12: Yes, STM32F105RBT6 supports in-system programming via its SWD interface.

Q13: What is the memory size of STM32F105RBT6? A13: The STM32F105RBT6 has 512 KB of Flash memory and 64 KB of SRAM.

Q14: Can STM32F105RBT6 interface with external devices? A14: Yes, it can interface with external devices using SPI, I2C, UART, and other communication protocols.

Q15: What is the operating temperature range of STM32F105RBT6? A15: The operating temperature range is from -40°C to +85°C, making it suitable for industrial and automotive applications.

Q16: Does STM32F105RBT6 have a watchdog timer? A16: Yes, it has an independent watchdog timer (IWDG) and a window watchdog timer (WWDG).

Q17: What type of oscillator does STM32F105RBT6 use? A17: It supports both external and internal oscillators, with an optional crystal for high accuracy.

Q18: How do I configure the STM32F105RBT6 in boot mode? A18: The boot mode can be configured using the BOOT0 pin, which selects the boot from system memory or Flash memory.

Q19: Does STM32F105RBT6 have DMA (Direct Memory Access )? A19: Yes, STM32F105RBT6 includes multiple DMA channels to offload data transfer tasks.

Q20: Can STM32F105RBT6 be used for audio applications? A20: Yes, it can be used for audio applications, especially with its DAC (Digital-to-Analog Converter) and high-quality timers.

This document provides a comprehensive breakdown of the STM32F105RBT6 microcontroller's features, including detailed pin functions, circuit principles, and usage instructions.