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N RF 51822-QFAC-R Detailed explanation of pin function specifications and circuit principle instructions

The model " NRF51822-QFAC-R " belongs to Nordic Semiconductor, a company well-known for its Bluetooth Low Energy (BLE) solutions and wireless microcontroller products.

Package Type:

The NRF51822-QFAC-R is a microcontroller in a QFN (Quad Flat No-lead) package. Specifically, it is a 48-pin QFN package, designed for compact integration of features while maintaining efficient performance for Bluetooth Low Energy applications.

Pin Function Table (48 Pins)

Below is the detailed pin function specification for the NRF51822-QFAC-R, which features 48 pins in total:

Pin Number Pin Name Pin Type Function Description 1 VCC Power Supply Voltage input (2.0 to 3.6V) 2 GND Power Ground 3 P0.00 GPIO General-purpose I/O pin, supports high-drive, high-current capabilities 4 P0.01 GPIO General-purpose I/O pin, can be configured for SPI or UART 5 P0.02 GPIO General-purpose I/O pin, supports analog-to-digital conversion 6 P0.03 GPIO General-purpose I/O pin 7 P0.04 GPIO General-purpose I/O pin, supports UART RX 8 P0.05 GPIO General-purpose I/O pin, supports UART TX 9 P0.06 GPIO General-purpose I/O pin, supports SPI MOSI 10 P0.07 GPIO General-purpose I/O pin, supports SPI MISO 11 P0.08 GPIO General-purpose I/O pin, supports I2C SDA 12 P0.09 GPIO General-purpose I/O pin, supports I2C SCL 13 P0.10 GPIO General-purpose I/O pin 14 P0.11 GPIO General-purpose I/O pin 15 P0.12 GPIO General-purpose I/O pin 16 P0.13 GPIO General-purpose I/O pin 17 P0.14 GPIO General-purpose I/O pin 18 P0.15 GPIO General-purpose I/O pin 19 P0.16 GPIO General-purpose I/O pin, supports ADC 20 P0.17 GPIO General-purpose I/O pin, supports ADC 21 P0.18 GPIO General-purpose I/O pin 22 P0.19 GPIO General-purpose I/O pin 23 P0.20 GPIO General-purpose I/O pin 24 P0.21 GPIO General-purpose I/O pin 25 P0.22 GPIO General-purpose I/O pin 26 P0.23 GPIO General-purpose I/O pin 27 P0.24 GPIO General-purpose I/O pin 28 P0.25 GPIO General-purpose I/O pin 29 P0.26 GPIO General-purpose I/O pin 30 P0.27 GPIO General-purpose I/O pin 31 P0.28 GPIO General-purpose I/O pin 32 P0.29 GPIO General-purpose I/O pin 33 P0.30 GPIO General-purpose I/O pin 34 P0.31 GPIO General-purpose I/O pin 35 P0.32 GPIO General-purpose I/O pin 36 P0.33 GPIO General-purpose I/O pin 37 P0.34 GPIO General-purpose I/O pin 38 P0.35 GPIO General-purpose I/O pin 39 P0.36 GPIO General-purpose I/O pin 40 P0.37 GPIO General-purpose I/O pin 41 P0.38 GPIO General-purpose I/O pin 42 P0.39 GPIO General-purpose I/O pin 43 RESET Input External Reset Input Pin 44 SWDIO Input/Output Serial Wire Debug Input/Output Pin 45 SWCLK Input Serial Wire Debug Clock Pin 46 VBUS Input USB Bus Voltage Pin 47 ANT RF Output antenna Pin (for RF communication) 48 GND Power Ground

Pin Functions FAQ (20 Common Questions)

What is the VCC pin for? The VCC pin is the supply voltage input for the NRF51822-QFAC-R and should be connected to a 2.0 to 3.6V power source. What is the function of P0.00? P0.00 is a general-purpose I/O pin that can be used for various functions like high-drive output or ADC input, depending on the configuration. How do I use P0.04 and P0.05? P0.04 and P0.05 are general-purpose I/O pins that can be used for UART communication (P0.04 is RX, P0.05 is TX). What is the function of the P0.16 and P0.17 pins? P0.16 and P0.17 are general-purpose I/O pins and are also capable of supporting analog-to-digital conversion (ADC). What does the RESET pin do? The RESET pin is used to externally reset the device, bringing it back to its initial state. Can I use the P0.06 and P0.07 pins for SPI? Yes, P0.06 and P0.07 are configured as SPI MOSI and MISO pins, respectively, and can be used for SPI communication. What is the SWDIO pin used for? The SWDIO pin is used for Serial Wire Debug input/output to facilitate debugging and programming the microcontroller. How do I use P0.08 and P0.09? P0.08 and P0.09 are used for I2C communication (P0.08 is SDA, P0.09 is SCL). What is the ANT pin for? The ANT pin is used for connecting the external antenna for RF communication in wireless applications like Bluetooth.

What is the USB VBUS pin used for?

The VBUS pin is connected to the USB bus voltage to indicate the presence of a USB connection.

How do I configure P0.31 to P0.39?

These pins are general-purpose I/O pins and can be configured as inputs, outputs, or for alternate functions based on user requirements.

Can I use all pins as digital I/O?

Yes, all pins can be used as general-purpose digital I/O, but some have specialized functions (e.g., SPI, UART, ADC).

What is the voltage range for the VCC pin?

The VCC pin operates in the voltage range of 2.0V to 3.6V.

What is the role of the GND pins?

GND pins provide the ground reference for the entire circuit, ensuring proper functioning and voltage levels.

Can I use the P0.12 pin for analog inputs?

Yes, P0.12 is capable of analog-to-digital conversion, allowing it to read analog signals.

How can I use P0.03?

P0.03 is a general-purpose I/O pin that can be used for various digital functions.

What are the power consumption implications of using high-drive pins?

Using high-drive pins like P0.00 will increase current consumption, which should be considered in power-sensitive designs.

What should I do if the RESET pin is not connected?

If the RESET pin is not used, the chip will rely on its internal reset mechanism.

Can I use the P0.18 pin for both I2C and GPIO?

Yes, the P0.18 pin can be configured as a GPIO or used for I2C communication.

How do I connect the SWCLK pin for debugging?

The SWCLK pin should be connected to a compatible debugging tool for programming and debugging the microcontroller.

This should give you a comprehensive overview of the pin functions, with all pins and their uses thoroughly described.