Pin assignments
The pin assignment figures and tables describe the pinouts for the product variants of the chip.
The nRF52805 device provides flexibility when it comes to routing and configuration of the GPIO pins. However, some pins have limitations or recommendations for how the pin should be configured or what it should be used for.
WLCSP ball assignments
The nRF52805 ball assignment table and figure describe the assignments for this variant of the chip.
Balls not mentioned in the ball assignments table below are not connected (NC) and must be soldered to the PCB.
| Pin | Name | Type | Description |
|---|---|---|---|
| A1 | XC1 | Analog input | Connection for 32 MHz crystal |
| A2 | XC2 | Analog input | Connection for 32 MHz crystal |
| A3 | DEC2 | Power | 1.3 V regulator supply decoupling (radio supply) |
| A4 | DEC4 | Power | 1.3 V analog supply. Input from DC/DC converter. Output from 1.3 V LDO. |
| A5 | DCC | Power | DC/DC converter output (3.3 V PWM) |
| A6 | VDD | Power | Power (battery) supply |
| B3 | VSS | Power | Ground |
| B4 | VSS | Power | Ground |
| B6 | DEC1 | Power | 0.9 V regulator digital supply decoupling |
| C1 | VSS_PA | Power | Ground |
| D3 | VSS | Power | Ground |
| D4 | VSS | Power | Ground |
| D5 | P0.01 XL2 | Digital I/O Analog input | General purpose I/O Connection for 32.768 kHz crystal (LFXO) |
| D6 | P0.00 XL1 | Digital I/O Analog input | General purpose I/O Connection for 32.768 kHz crystal (LFXO) |
| E1 | ANT | RF | Single-ended radio antenna connection |
| E3 | VSS | Power | Ground |
| E4 | VSS | Power | Ground |
| F1 | SWDIO | Digital I/O | Serial wire debug I/O for debug and programming |
| F2 | P0.20 | Digital I/O | General purpose I/O |
| F4 | P0.14 | Digital I/O | General purpose I/O |
| F5 | P0.04 AIN2 | Digital I/O Analog input | General purpose I/O SAADC input |
| F6 | P0.05 AIN3 | Digital I/O Analog input | General purpose I/O SAADC input |
| G1 | SWDCLK | Digital input | Serial wire debug clock input for debug and programming |
| G2 | P0.21 nRESET | Digital I/O | General purpose I/O Configurable as pin reset |
| G3 | P0.18 | Digital I/O | General purpose I/O |
| G4 | P0.16 | Digital I/O | General purpose I/O |
| G5 | P0.12 | Digital I/O | General purpose I/O |
| G6 | VDD | Power | Power (battery) supply |