Pin assignments
The pin assignment figures and tables describe the pinouts for the product variants of the chip.
The nRF52840 device provides flexibility regarding GPIO pin routing and configuration. However, some pins have limitations or recommendations for pin configurations and uses.
aQFN73 ball assignments
The ball assignment figure and table in the following section describe the assignments for this variant of the chip.
| Pin | Name | Function | Description | Recommended usage |
|---|---|---|---|---|
| A8 | P0.31 AIN7 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| A10 | P0.29 AIN5 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| A12 | P0.02 AIN0 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| A14 | P1.15 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| A16 | P1.13 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| A18 | DEC2 | Power | 1.3 V regulator supply decoupling | |
| A20 | P1.10 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| A22 | VDD | Power | Power supply | |
| A23 | XC2 | Analog input | Connection for 32 MHz crystal | |
| B1 | VDD | Power | Power supply | |
| B3 | DCC | Power | DC/DC converter output | |
| B5 | DEC4 | Power | 1.3 V regulator supply decoupling | Must be connected to DEC6 (pin E24) |
| B7 | VSS | Power | Ground | |
| B9 | P0.30 AIN6 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| B11 | P0.28 AIN4 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| B13 | P0.03 AIN1 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| B15 | P1.14 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| B17 | P1.12 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| B19 | P1.11 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| B24 | XC1 | Analog input | Connection for 32 MHz crystal | |
| C1 | DEC1 | Power | 1.1 V regulator supply decoupling | |
| D2 | P0.00 XL1 | Digital I/O Analog input | General purpose I/O Connection for 32.768 kHz crystal | |
| D23 | DEC3 | Power | Power supply, decoupling | |
| E24 | DEC6 | Power | 1.3 V regulator supply decoupling | Must be connected to DEC4 (pin B5) |
| F2 | P0.01 XL2 | Digital I/O Analog input | General purpose I/O Connection for 32.768 kHz crystal | |
| F23 | VSS_PA | Power | Ground (radio supply) | |
| G1 | P0.26 | Digital I/O | General purpose I/O | |
| H2 | P0.27 | Digital I/O | General purpose I/O | |
| H23 | ANT | RF | Single-ended radio antenna connection | See Reference circuitry for guidelines on how to ensure good RF performance |
| J1 | P0.04 AIN2 | Digital I/O Analog input | General purpose I/O Analog input | |
| J24 | P0.10 NFC2 | Digital I/O NFC input | General purpose I/O NFC antenna connection | Standard drive, low frequency I/O only |
| K2 | P0.05 AIN3 | Digital I/O Analog input | General purpose I/O Analog input | |
| L1 | P0.06 | Digital I/O | General purpose I/O | |
| L24 | P0.09 NFC1 | Digital I/O NFC input | General purpose I/O NFC antenna connection | Standard drive, low frequency I/O only |
| M2 | P0.07 TRACECLK | Digital I/O Trace clock | General purpose I/O Trace buffer clock | |
| N1 | P0.08 | Digital I/O | General purpose I/O | |
| N24 | DEC5 Not connected | Power | 1.3 V regulator supply decoupling for build codes Dxx and earlier. Not connected for build codes Fxx and later. | |
| P2 | P1.08 | Digital I/O | General purpose I/O | |
| P23 | P1.07 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| R1 | P1.09 TRACEDATA3 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[3] | |
| R24 | P1.06 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| T2 | P0.11 TRACEDATA2 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[2] | |
| T23 | P1.05 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| U1 | P0.12 TRACEDATA1 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[1] | |
| U24 | P1.04 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| V23 | P1.03 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| W1 | VDD | Power | Power supply | |
| W24 | P1.02 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| Y2 | VDDH | Power | High voltage power supply | |
| Y23 | P1.01 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| AA24 | SWDCLK | Debug | Serial wire debug clock input for debug and programming | |
| AB2 | DCCH | Power | DC/DC converter output | |
| AC5 | DECUSB | Power | USB 3.3 V regulator supply decoupling | |
| AC9 | P0.14 | Digital I/O | General purpose I/O | |
| AC11 | P0.16 | Digital I/O | General purpose I/O | |
| AC13 | P0.18 nRESET | Digital I/O | General purpose I/O Configurable as pin RESET | QSPI/CSN |
| AC15 | P0.19 | Digital I/O | General purpose I/O | QSPI/SCK |
| AC17 | P0.21 | Digital I/O | General purpose I/O | QSPI |
| AC19 | P0.23 | Digital I/O | General purpose I/O | QSPI |
| AC21 | P0.25 | Digital I/O | General purpose I/O | |
| AC24 | SWDIO | Debug | Serial wire debug I/O for debug and programming | |
| AD2 | VBUS | Power | 5 V input for USB 3.3 V regulator | |
| AD4 | D- | USB | USB D- | |
| AD6 | D+ | USB | USB D+ | |
| AD8 | P0.13 | Digital I/O | General purpose I/O | |
| AD10 | P0.15 | Digital I/O | General purpose I/O | |
| AD12 | P0.17 | Digital I/O | General purpose I/O | |
| AD14 | VDD | Power | Power supply | |
| AD16 | P0.20 | Digital I/O | General purpose I/O | |
| AD18 | P0.22 | Digital I/O | General purpose I/O | QSPI |
| AD20 | P0.24 | Digital I/O | General purpose I/O | |
| AD22 | P1.00 TRACEDATA0 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[0] Serial wire output (SWO) | QSPI |
| AD23 | VDD | Power | Power supply | |
| Die pad | VSS | Power | Ground pad | Exposed die pad must be connected to ground (VSS) for proper device operation |
QFN48 pin assignments
The pin assignment figure and table describe the assignments for this variant of the chip.
| Pin | Name | Function | Description | Recommended usage |
|---|---|---|---|---|
| Left side of the chip | ||||
| 1 | DEC1 | Power | 1.1 V Digital supply decoupling | |
| 2 | P0.00 XL1 | Digital I/O Analog input | General purpose I/O Connection for 32.768 kHz crystal | |
| 3 | P0.01 XL2 | Digital I/O Analog input | General purpose I/O Connection for 32.768 kHz crystal | |
| 4 | P0.04 AIN2 | Digital I/O Analog input | General purpose I/O Analog input | |
| 5 | P0.05 AIN3 | Digital I/O Analog input | General purpose I/O Analog input | |
| 6 | P0.07 TRACECLK | Digital I/O Trace clock | General purpose I/O Trace buffer clock | |
| 7 | P0.08 | Digital I/O | General purpose I/O | |
| 8 | P1.08 | Digital I/O | General purpose I/O | |
| 9 | P1.09 TRACEDATA3 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[3] | |
| 10 | P0.11 TRACEDATA2 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[2] | |
| 11 | P0.12 TRACEDATA1 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[1] | |
| 12 | VDD | Power | Power supply | |
| Bottom side of chip | ||||
| 13 | P0.13 | Digital I/O | General purpose I/O | |
| 14 | P0.14 | Digital I/O | General purpose I/O | |
| 15 | P0.17 | Digital I/O | General purpose I/O | |
| 16 | P0.18 nRESET | Digital I/O | General purpose I/O Configurable as pin RESET | QSPI/CSN |
| 17 | VDD | Power | Power supply | |
| 18 | P0.19 | Digital I/O | General purpose I/O | QSPI/SCK |
| 19 | P0.20 | Digital I/O | General purpose I/O | |
| 20 | P0.21 | Digital I/O | General purpose I/O | QSPI |
| 21 | P0.22 | Digital I/O | General purpose I/O | QSPI |
| 22 | P0.23 | Digital I/O | General purpose I/O | QSPI |
| 23 | P0.24 | Digital I/O | General purpose I/O | |
| 24 | P1.00 TRACEDATA0 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[0] Serial wire output (SWO) | QSPI |
| Right side of the chip | ||||
| 25 | VDD | Power | Power supply | |
| 26 | SWDIO | Debug | Serial wire debug I/O for debug and programming | |
| 27 | SWDCLK | Debug | Serial wire debug clock input for debug and programming | |
| 28 | NC | Not connected | ||
| 29 | P0.09 NFC1 | Digital I/O NFC input | General purpose I/O NFC antenna connection | Standard drive, low frequency I/O only |
| 30 | P0.10 NFC2 | Digital I/O NFC input | General purpose I/O NFC antenna connection | Standard drive, low frequency I/O only |
| 31 | ANT | RF | Single-ended radio antenna connection | See Reference circuitry for guidelines on how to ensure good RF performance |
| 32 | VSS_PA | Power | Ground (radio supply) | |
| 33 | DEC6 | Power | 1.3 V regulator supply decoupling | Must be connected to DEC4 (pin 46) |
| 34 | DEC3 | Power | Power supply, decoupling | |
| 35 | XC1 | Analog input | Connection for 32 MHz crystal | |
| 36 | XC2 | Analog input | Connection for 32 MHz crystal | |
| Top side of the chip | ||||
| 37 | VDD | Power | Power supply | |
| 38 | P1.15 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| 39 | P0.03 AIN1 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| 40 | P0.02 AIN0 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| 41 | P0.28 AIN4 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| 42 | P0.29 AIN5 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| 43 | P0.30 AIN6 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| 44 | P0.31 AIN7 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| 45 | VSS | Power | Ground | |
| 46 | DEC4 | Power | 1.3 V regulator supply decoupling | Must be connected to DEC6 (pin 33) |
| 47 | DCC | Power | DC/DC converter output | |
| 48 | VDD | Power | Power supply | |
| Backside of the chip | ||||
| Die pad | VSS | Power | Ground pad | Exposed die pad must be connected to ground (VSS) for proper device operation |
WLCSP ball assignments
The ball assignment figure and table describe the assignments for this variant of the chip.
| Pin | Name | Function | Description | Recommended usage |
|---|---|---|---|---|
| A1 | XC1 | Analog input | Connection for 32 MHz crystal | |
| A2 | XC2 | Analog input | Connection for 32 MHz crystal | |
| A3 | P1.11 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| A4 | P1.13 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| A5 | P0.03 AIN1 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| A6 | P0.28 AIN4 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| A7 | P0.30 AIN6 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| A8 | DEC4 | Power | 1.3 V regulator supply decoupling Must be connected to DEC6 (pin C2) | |
| A9 | DCC | Power | DC/DC converter output | |
| A10 | DEC1 | Power | 1.1 V regulator supply decoupling | |
| B3 | VDD | Power | Power supply | |
| B4 | P1.10 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| B5 | P1.14 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| B6 | P0.02 AIN0 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| B7 | VSS | Power | Ground | |
| B8 | VDD | Power | Power supply | |
| B9 | P0.00 XL1 | Digital I/O Analog input | General purpose I/O Connection for 32.768 kHz crystal | |
| B10 | P0.01 XL2 | Digital I/O Analog input | General purpose I/O Connection for 32.768 kHz crystal | |
| C1 | VSS_PA | Power | Ground (radio supply) | |
| C2 | DEC6 | Power | 1.3 V regulator supply decoupling Must be connected to DEC4 (pin A8) | |
| C4 | VSS | Power | Ground | |
| C5 | P1.12 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| C6 | P1.15 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| C7 | P0.29 AIN5 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| C8 | P0.31 AIN7 | Digital I/O Analog input | General purpose I/O Analog input | Standard drive, low frequency I/O only |
| C9 | P0.26 | Digital I/O | General purpose I/O | |
| C10 | P0.04 AIN2 | Digital I/O Analog input | General purpose I/O Analog input | |
| D3 | VSS | Power | Ground | |
| D4 | VSS | Power | Ground | |
| D5 | VSS | Power | Ground | |
| D6 | VSS | Power | Ground | |
| D7 | VSS | Power | Ground | |
| D8 | VSS | Power | Ground | |
| D9 | P0.27 | Digital I/O | General purpose I/O | |
| D10 | P0.05 AIN3 | Digital I/O Analog input | General purpose I/O Analog input | |
| E1 | ANT | RF | Single-ended radio antenna connection | See Reference circuitry for guidelines on how to ensure good RF performance |
| E2 | P0.10 NFC2 | Digital I/O NFC input | General purpose I/O NFC antenna connection | Standard drive, low frequency I/O only |
| E3 | P1.06 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| E4 | VSS | Power | Ground | |
| E5 | VSS | Power | Ground | |
| E6 | VSS | Power | Ground | |
| E7 | VSS | Power | Ground | |
| E8 | VSS | Power | Ground | |
| E9 | P0.06 | Digital I/O | General purpose I/O | |
| E10 | P0.08 | Digital I/O | General purpose I/O | |
| F1 | P0.09 NFC1 | Digital I/O NFC input | General purpose I/O NFC antenna connection | Standard drive, low frequency I/O only |
| F2 | DEC5 Not connected | Power | 1.3 V regulator supply decoupling for build codes Dxx and earlier. Not connected for build codes Fxx and later. | |
| F3 | P1.03 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| F4 | VSS | Power | Ground | |
| F5 | VSS | Power | Ground | |
| F6 | VSS | Power | Ground | |
| F7 | VSS | Power | Ground | |
| F8 | VSS | Power | Ground | |
| F9 | P0.07 TRACECLK | Digital I/O Trace clock | General purpose I/O Trace buffer clock | |
| F10 | P1.09 TRACEDATA3 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[3] | |
| G1 | P1.07 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| G2 | P1.05 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| G3 | P1.02 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| G4 | VSS | Power | Ground | |
| G5 | VSS | Power | Ground | |
| G6 | VSS | Power | Ground | |
| G7 | VSS | Power | Ground | |
| G8 | VSS | Power | Ground | |
| G9 | P1.08 | Digital I/O | General purpose I/O | |
| G10 | P0.12 TRACEDATA1 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[1] | |
| H1 | P1.04 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| H2 | SWDCLK | Digital input | Serial wire debug clock input for debug and programming | |
| H4 | P0.24 | Digital I/O | General purpose I/O | |
| H5 | P0.23 | Digital I/O | General purpose I/O | QSPI |
| H6 | P0.16 | Digital I/O | General purpose I/O | |
| H7 | P0.13 | Digital I/O | General purpose I/O | |
| H8 | P0.11 TRACEDATA2 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[2] | |
| H9 | DCCH | Power | DC/DC converter output | |
| H10 | VDD | Power | Power supply | |
| J1 | P1.01 | Digital I/O | General purpose I/O | Standard drive, low frequency I/O only |
| J2 | SWDIO | Digital I/O | Serial wire debug I/O for debug and programming | |
| J3 | P1.00 TRACEDATA0 | Digital I/O Trace data | General purpose I/O Trace buffer TRACEDATA[0] Serial wire output (SWO) | QSPI |
| J4 | P0.21 | Digital I/O | General purpose I/O | QSPI |
| J5 | P0.20 | Digital I/O | General purpose I/O | |
| J6 | P0.17 | Digital I/O | General purpose I/O | |
| J7 | P0.14 | Digital I/O | General purpose I/O | |
| J8 | D- | USB | USB D- | |
| J9 | VBUS | Power | 5 V input for USB 3.3 V regulator | |
| J10 | VDDH | Power | High voltage power supply | |
| K1 | VDD | Power | Power supply | |
| K2 | P0.25 | Digital I/O | General purpose I/O | |
| K3 | P0.22 | Digital I/O | General purpose I/O | QSPI |
| K4 | P0.19 | Digital I/O | General purpose I/O | QSPI/SCK |
| K5 | VDD | Power | Power supply | |
| K6 | P0.18 nRESET | Digital I/O | General purpose I/O Configurable as pin reset | QSPI/CSN |
| K7 | P0.15 | Digital I/O | General purpose I/O | |
| K8 | D+ | USB | USB D+ | |
| K9 | DECUSB | Power | USB 3.3 V regulator supply decoupling | |
| K10 | VSS | Power | Ground |