The model you mentioned, N RF 24L01P-R, is part of the Nordic Semiconductor series of wireless Communication module s. It is designed for short-range, low- Power wireless communication, typically used for applications like remote controls, sensor networks, and home automation systems.
Here’s a detailed breakdown of its pinout, along with pin functions and circuit principles:
Package Type
The NRF24L01P-R typically comes in a QFN (Quad Flat No-lead) package with 24 pins. It is a compact surface-mount device (SMD) with all pins accessible on the flat surface, designed for easy soldering on PCBs.
Pinout and Pin Function Specifications
Below is a comprehensive list of the 24 pins on the NRF24L01P-R module, detailing each pin's functionality.
Pin Number Pin Name Pin Function 1 VCC Power supply pin. Supplies 1.9V to 3.6V to the module, typically 3.3V. 2 GND Ground pin. Used for the common ground reference in the circuit. 3 CE Chip Enable pin. Used to enable or disable the chip's operation (active low). When set high, the chip is enabled for communication. 4 CSN Chip Select Not pin. This pin is used to select the chip for SPI communication. It is active low. 5 SCK Serial Clock pin. This pin carries the clock signal for the SPI communication. 6 MOSI Master Out Slave In pin. Used to send data from the master to the slave (NRF24L01P-R) in SPI communication. 7 MISO Master In Slave Out pin. Used to receive data from the slave (NRF24L01P-R) to the master in SPI communication. 8 IRQ Interrupt Request pin. Provides an interrupt signal to the microcontroller when an event occurs, such as transmission or reception completion. 9 VCC Power supply pin (same as pin 1). 10 GND Ground pin (same as pin 2). 11 NC No connection. This pin is not internally connected to the chip and has no functional role. 12 NC No connection. This pin is not internally connected to the chip and has no functional role. 13 NC No connection. This pin is not internally connected to the chip and has no functional role. 14 NC No connection. This pin is not internally connected to the chip and has no functional role. 15 NC No connection. This pin is not internally connected to the chip and has no functional role. 16 NC No connection. This pin is not internally connected to the chip and has no functional role. 17 NC No connection. This pin is not internally connected to the chip and has no functional role. 18 NC No connection. This pin is not internally connected to the chip and has no functional role. 19 NC No connection. This pin is not internally connected to the chip and has no functional role. 20 NC No connection. This pin is not internally connected to the chip and has no functional role. 21 NC No connection. This pin is not internally connected to the chip and has no functional role. 22 NC No connection. This pin is not internally connected to the chip and has no functional role. 23 NC No connection. This pin is not internally connected to the chip and has no functional role. 24 NC No connection. This pin is not internally connected to the chip and has no functional role.Note: The NRF24L01P-R module has multiple NC (No Connection) pins, which are not used for functionality and can be left unconnected.
NRF24L01P-R Circuit Principles
The NRF24L01P-R module operates based on SPI (Serial Peripheral interface ) communication, which is the primary interface used to communicate with microcontrollers. It allows for high-speed data transfer in both directions between the module and the controlling microcontroller.
Key principles:
CE Pin: Enables communication when driven high and allows the module to transmit or receive data. CSN Pin: Used to select the module for communication. SCK, MOSI, MISO: These three pins form the SPI bus, where the clock signal (SCK) synchronizes data transfer, MOSI sends data from the microcontroller to the module, and MISO receives data from the module to the microcontroller. IRQ Pin: Used for signaling interrupts when an important event (such as data transmission or reception) occurs.Frequently Asked Questions (FAQ)
Here are 20 common questions related to the NRF24L01P-R module and its pins:
What is the operating voltage range for the NRF24L01P-R module? The operating voltage range is 1.9V to 3.6V, with 3.3V being typical. Can I use the NRF24L01P-R module with a 5V system? No, the module requires a 3.3V supply. Using 5V can damage the module. What is the function of the CE pin on the NRF24L01P-R? The CE (Chip Enable) pin is used to enable or disable the chip's communication capability. When high, the chip is active. What does the CSN pin do? The CSN (Chip Select Not) pin is used to select the module for SPI communication. It must be low to initiate communication. What is the purpose of the IRQ pin? The IRQ (Interrupt Request) pin alerts the microcontroller to events such as transmission completion or data reception. How do I communicate with the NRF24L01P-R module? Communication occurs via SPI, using the SCK, MOSI, and MISO pins. What happens if the NC pins are connected? NC (No Connection) pins should remain unconnected as they have no function. Can I use the NRF24L01P-R for long-distance communication? The range depends on the environment and antenna , but the module is generally suited for short-range communication (up to 100 meters). How many pins are there on the NRF24L01P-R module? The module has 24 pins in total.What is the data transmission speed of the NRF24L01P-R?
The module supports a data rate of up to 2 Mbps.Do I need an external antenna for the NRF24L01P-R module?
It depends on the specific version. Some versions come with an external antenna, while others use a built-in antenna.How do I configure the NRF24L01P-R module for communication?
Configuration is done using the SPI interface, where you send setup commands to the module.Is the NRF24L01P-R compatible with 3.3V microcontrollers?
Yes, the module is designed to work with 3.3V systems.What is the maximum output power of the NRF24L01P-R?
The module can output up to 0 dBm of power.Can the NRF24L01P-R module be used in a network of multiple devices?
Yes, it can be used in a network with multiple modules communicating with each other.Does the NRF24L01P-R have a built-in microcontroller?
No, the NRF24L01P-R is a transceiver and requires an external microcontroller for control.What is the function of the VCC pin?
The VCC pin provides power to the module, typically 3.3V.Can I use the NRF24L01P-R with an Arduino?
Yes, the module is commonly used with Arduino for wireless communication.What is the role of the GND pin?
The GND pin provides the ground connection for the module.What is the communication protocol used by the NRF24L01P-R?
The module uses SPI for communication with external devices.This detailed breakdown should help you understand the functionality of the NRF24L01P-R and how to work with its pins.