The part number "CC2540F256RHAR" belongs to Texas Instruments, specifically from their line of Bluetooth solutions. The CC2540 is a Bluetooth System-on-Chip ( SoC ) designed for Bluetooth low energy (BLE) and Classic Bluetooth applications. It is typically used in wireless communication projects, offering low- Power operation and a versatile interface for Bluetooth applications.
Package Type:
The part number "CC2540F256RHAR" corresponds to a QFN-56 package (Quad Flat No-leads, 56 pins).
Pin Function Specifications & Circuit Principle:
The CC2540 has 56 pins, each with specific functions that include power supply, digital inputs/outputs, analog functions, and communication interfaces. Below is a detailed description of the functions of all the pins in this package. I will break it down by groups of pins, categorizing them according to their functions.
Pinout of CC2540 (QFN-56 package) with Function Description:
Pin Number Pin Name Function Description 1 P0_0 GPIO, PWM, UART, SPI, I2C, ADC 2 P0_1 GPIO, PWM, UART, SPI, I2C, ADC 3 P0_2 GPIO, PWM, UART, SPI, I2C, ADC 4 P0_3 GPIO, PWM, UART, SPI, I2C, ADC 5 P0_4 GPIO, PWM, UART, SPI, I2C, ADC 6 P0_5 GPIO, PWM, UART, SPI, I2C, ADC 7 P0_6 GPIO, PWM, UART, SPI, I2C, ADC 8 P0_7 GPIO, PWM, UART, SPI, I2C, ADC 9 P1_0 GPIO, PWM, UART, SPI, I2C, ADC 10 P1_1 GPIO, PWM, UART, SPI, I2C, ADC 11 P1_2 GPIO, PWM, UART, SPI, I2C, ADC 12 P1_3 GPIO, PWM, UART, SPI, I2C, ADC 13 P1_4 GPIO, PWM, UART, SPI, I2C, ADC 14 P1_5 GPIO, PWM, UART, SPI, I2C, ADC 15 P1_6 GPIO, PWM, UART, SPI, I2C, ADC 16 P1_7 GPIO, PWM, UART, SPI, I2C, ADC 17 VDD Power supply pin (3.3V typically) 18 VSS Ground pin 19 V DDS Power supply pin (3.3V for digital) 20 VSSA Ground pin (Analog) 21 RESET Active low reset pin for device initialization 22 XOSC External crystal oscillator input pin 23 XOSCL External crystal oscillator low pin 24 DCOUPL Internal decoupling for the clock system 25 AVDD Analog power supply pin (3.3V typically) 26 VSS Ground pin 27 P2_0 GPIO, PWM, UART, SPI, I2C, ADC 28 P2_1 GPIO, PWM, UART, SPI, I2C, ADC 29 P2_2 GPIO, PWM, UART, SPI, I2C, ADC 30 P2_3 GPIO, PWM, UART, SPI, I2C, ADC 31 P2_4 GPIO, PWM, UART, SPI, I2C, ADC 32 P2_5 GPIO, PWM, UART, SPI, I2C, ADC 33 P2_6 GPIO, PWM, UART, SPI, I2C, ADC 34 P2_7 GPIO, PWM, UART, SPI, I2C, ADC 35 P3_0 GPIO, PWM, UART, SPI, I2C, ADC 36 P3_1 GPIO, PWM, UART, SPI, I2C, ADC 37 P3_2 GPIO, PWM, UART, SPI, I2C, ADC 38 P3_3 GPIO, PWM, UART, SPI, I2C, ADC 39 P3_4 GPIO, PWM, UART, SPI, I2C, ADC 40 P3_5 GPIO, PWM, UART, SPI, I2C, ADC 41 P3_6 GPIO, PWM, UART, SPI, I2C, ADC 42 P3_7 GPIO, PWM, UART, SPI, I2C, ADC 43 RSTN Reset for external peripherals (Active low) 44 NRESET Reset for external peripherals (Active low) 45 DCIN DC Input for external power 46 AIN0 Analog input channel 0 47 AIN1 Analog input channel 1 48 AIN2 Analog input channel 2 49 AIN3 Analog input channel 3 50 AIN4 Analog input channel 4 51 AIN5 Analog input channel 5 52 AIN6 Analog input channel 6 53 AIN7 Analog input channel 7 54 ADCREF Analog reference voltage input pin 55 DEBUG_OUT Debugging output pin 56 DEBUG_IN Debugging input pin20 FAQ about CC2540F256RHAR:
Q: What is the purpose of the pin RESET on the CC2540F256RHAR? A: The RESET pin is used for resetting the entire device. It is active low, meaning when it is pulled low, it resets the chip. Q: What is the VDD pin used for? A: The VDD pin supplies the device with the main power voltage, typically 3.3V. Q: What is the XOSC pin used for? A: The XOSC pin is for connecting an external crystal oscillator, providing the clock for the device. Q: How does the P0_0 pin function? A: The P0_0 pin is a general-purpose I/O (GPIO) pin that can also function as a PWM, UART, SPI, I2C, or ADC pin, depending on configuration. Q: How do I use the analog pins AIN0 to AIN7? A: The AIN pins are used for analog input, typically in ADC operations, where the device measures analog voltages. Q: What is the role of the DCIN pin? A: The DCIN pin is used for connecting an external DC power supply to the device. Q: Can I use the pin P2_5 for communication? A: Yes, the P2_5 pin can be configured for UART, SPI, I2C, PWM, or GPIO, allowing for versatile communication. Q: What does the AIN7 pin represent? A: AIN7 is an analog input channel, and it can be used for analog measurements like other AIN pins. Q: What voltage does the pin VDDS provide? A: The VDDS pin supplies a 3.3V voltage for the digital portion of the chip.Q: Can I use pin P3_7 for power?
A: No, P3_7 is a GPIO pin, and it should not be used for power connections.Q: How do I reset the CC2540F256RHAR using external pins?
A: You can use the RSTN or NRESET pins to reset the device externally by pulling them low.Q: What is the function of the pin DEBUG_IN?
A: DEBUG_IN is used for input to debug the device, often for programming or testing.Q: What type of crystal oscillator can I connect to the XOSC pins?
A: You can connect a standard 32.768 kHz crystal oscillator or a higher frequency one, depending on your system's needs.Q: Does the CC2540F256RHAR support I2C?
A: Yes, many pins, including P00 through P07, P10 through P17, P20 through P27, and P30 through P37, support I2C functions.Q: What does the DEBUG_OUT pin do?
A: The DEBUG_OUT pin outputs data used during debugging, often for development and troubleshooting.Q: How many GPIO pins does the CC2540F256RHAR have?
A: The CC2540F256RHAR provides up to 40 general-purpose I/O pins, depending on the specific configuration.Q: Can I connect external peripherals to the CC2540F256RHAR?
A: Yes, the device provides pins for connecting peripherals like sensors, actuators, and external devices using various communication protocols.Q: Can I use the P0_0 pin for UART?
A: Yes, P0_0 can be used for UART communication, as it is multiplexed with several other functions.Q: How do I configure the pins for PWM output?
A: You can configure any GPIO pin (like P00 to P07, P10 to P17) to output PWM signals through the appropriate registers.Q: Is it possible to use SPI on the CC2540F256RHAR?
A: Yes, the CC2540F256RHAR supports SPI communication, and several pins (P00 to P07, P10 to P17, etc.) can be configured for SPI functions.This detailed pin function table and FAQ guide should provide you with a comprehensive understanding of the CC2540F256RHAR's pins and their uses.
