APM32F103CBT6 Detailed explanation of pin function specifications and circuit principle instructions

The model "APM32F103CBT6" belongs to the STMicroelectronics brand, which is a widely recognized manufacturer of microcontrollers and other semiconductor devices. This particular model is part of the ARM Cortex-M3 series and is used in various embedded system applications.

Here is an in-depth explanation of the pin function specifications and circuit principle instructions, along with the detailed pinout for the LQFP-48 package, as well as frequently asked questions (FAQ) regarding the pin functionality:

Pinout and Function List

The APM32F103CBT6 is available in the LQFP-48 (Low-profile Quad Flat Package with 48 pins). Below is the detailed pinout for this package, including all 48 pins with their corresponding functions.

Pinout for APM32F103CBT6 (LQFP-48) Pin # Pin Name Function Description 1 VDD Power supply (3.3V) 2 VSS Ground 3 NRST Reset pin 4 SWDIO Serial wire debug I/O 5 SWCLK Serial wire clock 6 PA0 GPIO, External Interrupt (EXTI0) 7 PA1 GPIO, External Interrupt (EXTI1) 8 PA2 GPIO, USART2 TX (transmit) 9 PA3 GPIO, USART2 RX (receive) 10 PA4 GPIO, SPI1 NSS (chip select) 11 PA5 GPIO, SPI1 SCK (clock) 12 PA6 GPIO, SPI1 MISO (master in slave out) 13 PA7 GPIO, SPI1 MOSI (master out slave in) 14 PB0 GPIO, External Interrupt (EXTI0) 15 PB1 GPIO, External Interrupt (EXTI1) 16 PB2 GPIO, External Interrupt (EXTI2) 17 PB3 GPIO, External Interrupt (EXTI3) 18 PB4 GPIO, External Interrupt (EXTI4) 19 PB5 GPIO, SPI1 SCK (clock) 20 PB6 GPIO, USART1 TX (transmit) 21 PB7 GPIO, USART1 RX (receive) 22 PC13 GPIO, External Interrupt (EXTI13) 23 PC14 GPIO, External Interrupt (EXTI14) 24 PC15 GPIO, External Interrupt (EXTI15) 25 PD0 GPIO, USART3 TX (transmit) 26 PD1 GPIO, USART3 RX (receive) 27 PD2 GPIO, SPI2 NSS (chip select) 28 PD3 GPIO, SPI2 SCK (clock) 29 PD4 GPIO, SPI2 MISO (master in slave out) 30 PD5 GPIO, SPI2 MOSI (master out slave in) 31 PD6 GPIO, Timer 3 CH1 (capture/compare) 32 PD7 GPIO, Timer 3 CH2 (capture/compare) 33 PD8 GPIO, Timer 3 CH3 (capture/compare) 34 PD9 GPIO, Timer 3 CH4 (capture/compare) 35 PE0 GPIO, Timer 4 CH1 (capture/compare) 36 PE1 GPIO, Timer 4 CH2 (capture/compare) 37 PE2 GPIO, Timer 4 CH3 (capture/compare) 38 PE3 GPIO, Timer 4 CH4 (capture/compare) 39 PE4 GPIO, External Interrupt (EXTI4) 40 PE5 GPIO, External Interrupt (EXTI5) 41 PE6 GPIO, External Interrupt (EXTI6) 42 PE7 GPIO, External Interrupt (EXTI7) 43 PE8 GPIO, Timer 1 CH1 (capture/compare) 44 PE9 GPIO, Timer 1 CH2 (capture/compare) 45 PE10 GPIO, Timer 1 CH3 (capture/compare) 46 PE11 GPIO, Timer 1 CH4 (capture/compare) 47 VDD Power supply (3.3V) 48 VSS Ground

Pin Function FAQs

1. What is the function of pin PA0 on APM32F103CBT6? Answer: Pin PA0 is a General Purpose Input/Output (GPIO) pin, and it is also connected to external interrupt EXTI0.

2. What function does PA2 serve? Answer: Pin PA2 is used for USART2 TX, which is the transmit line for serial communication.

3. How does the pin PA3 operate? Answer: Pin PA3 is used for USART2 RX, which is the receive line for serial communication.

4. What is the role of pin PB5? Answer: Pin PB5 serves as the clock (SCK) for SPI1 communication.

5. How is pin PC13 used? Answer: Pin PC13 is a GPIO pin that is also connected to external interrupt EXTI13.

6. What functionality does pin PD0 provide? Answer: Pin PD0 is used as the USART3 TX line for transmitting serial data.

7. What is the function of pin PD1? Answer: Pin PD1 is used as the USART3 RX line for receiving serial data.

8. Can pin PD4 be used for SPI communication? Answer: Yes, pin PD4 is used as MISO for SPI2 communication (Master In Slave Out).

9. How is pin PE0 utilized? Answer: Pin PE0 is connected to Timer 4 Channel 1, which can be used for PWM or other timing-related applications.

10. What does pin PE8 serve for? Answer: Pin PE8 is connected to Timer 1 Channel 1 and can be used for PWM output or capture/compare operations.

11. What is the reset function of pin NRST? Answer: Pin NRST is the reset pin for the APM32F103CBT6 microcontroller, used to reset the chip.

12. What is the purpose of the SWDIO and SWCLK pins? Answer: SWDIO is the data line for Serial Wire Debug (SWD), while SWCLK is the clock line for debugging.

13. How can I use the SPI interface on the APM32F103CBT6? Answer: The SPI interface is available on pins PA4 (NSS), PA5 (SCK), PA6 (MISO), and PA7 (MOSI).

14. What does pin PA5 do in SPI communication? Answer: Pin PA5 functions as the clock line (SCK) for SPI1 communication.

15. Can pin PB6 be used for serial communication? Answer: Yes, pin PB6 serves as USART1 TX, which is used for transmitting serial data.

16. Is pin PA1 used for interrupts? Answer: Yes, pin PA1 is a GPIO pin that is connected to external interrupt EXTI1.

17. How do I use Timer channels in this microcontroller? Answer: You can use Timer channels available on pins PD6 to PD9 and PE0 to PE3 for PWM output or input capture/compare operations.

18. Are the pins VDD and VSS for power supply? Answer: Yes, VDD (pin 1 and 47) provides power, while VSS (pin 2 and 48) is the ground.

19. Can external components be connected to the EXTI pins? Answer: Yes, pins like PA0, PA1, PB0, PB1, and others can be configured as external interrupt pins for triggering events.

20. How can I reset the microcontroller using the NRST pin? Answer: To reset the microcontroller, a low signal should be applied to the NRST pin, which will restart the system.

This overview includes detailed descriptions of the pin functions for the APM32F103CBT6 in the LQFP-48 package, along with an FAQ to assist in better understanding and application of the pin functions. Let me know if you need any more details!