The nRF5340 DK has a range of solder bridges for enabling or disabling functionality on the Development Kit (DK). Changes to these are not needed for normal use of the DK.
The following table is an overview of the solder bridges on the nRF5340 DK.
| Solder bridge | Default | Function |
|---|---|---|
| SB1 | Closed | Cut to disconnect the 32.768 kHz on P0.01 |
| SB2 | Closed | Cut to disconnect the 32.768 kHz on P0.00 |
| SB3 | Open | Short to enable P0.01 as normal GPIO |
| SB4 | Open | Short to enable P0.00 as normal GPIO |
| SB5 | Closed | Cut to disconnect LED1 |
| SB6 | Closed | Cut to disconnect LED2 |
| SB7 | Closed | Cut to disconnect LED3 |
| SB8 | Closed | Cut to disconnect LED4 |
| SB9 | Open | Short to bypass peripheral power switch |
| SB10 | Closed | Cut to disconnect the QSPI memory from P0.16 |
| SB11 | Closed | Cut to disconnect the QSPI memory from P0.17 |
| SB12 | Closed | Cut to disconnect the QSPI memory from P0.13 |
| SB13 | Closed | Cut to disconnect the QSPI memory from P0.18 |
| SB14 | Closed | Cut to disconnect the QSPI memory from P0.14 |
| SB15 | Closed | Cut to disconnect the QSPI memory from P0.15 |
| SB16 | Closed | Cut to disconnect QSPI memory power supply from VDD_PER |
| SB17 | Open | Short to connect QSPI memory power supply to VDD |
| SB18 | Open | Short to connect QSPI memory power supply to VDD_nRF |
| SB20 | Open | Short to enable P0.16 as a normal GPIO |
| SB21 | Open | Short to enable P0.17 as a normal GPIO |
| SB22 | Open | Short to enable P0.13 as a normal GPIO |
| SB23 | Open | Short to enable P0.18 as a normal GPIO |
| SB24 | Open | Short to enable P0.14 as a normal GPIO |
| SB25 | Open | Short to enable P0.15 as a normal GPIO |
| SB26 | Closed | Cut to disable the rgw pull-up resistor of the RESET line |
| SB27 | Closed | Cut to disconnect the nRF5340 CTS line from the signal switch and interface MCU |
| SB28 | Closed | Cut to disconnect the nRF5340 RTS line from the signal switch and interface MCU |
| SB29 | Closed | Cut to disconnect the nRF5340 RxD line from the signal switch and the interface MCU |
| SB30 | Closed | Cut to disconnect the nRF5340 TxD line from the signal switch and interface MCU |
| SB31 | Open | Short to bypass the USB detect switch |
| SB32 | Open | Short to permanently enable the I2C pull-up resistors |
| SB33 | Closed | Cut to permanently disable the I2C pull-up resistors |
| SB34 | Open | Short to bypass the power switch on the USB power |
| SB35 | Open | Short to bypass the power switch on the coin cell battery power |
| SB36 | Open | Short to bypass the power switch on the external supply power |
| SB37 | Open | Short to bypass the interface MCU power switch |
| SB38 | Closed | Cut to disable VDD power to the Arduino interface |
| SB39 | Open | Short to bypass the power switch for regulator, coin cell, or external supply |
| SB40 | Closed | Cut for current measurements of the VDD_nRF |
| SB41 | Closed | Cut for current measurements of the VDD_nRF_HV |
| SB42 | Closed | Cut to disconnect the RESET button from the application nRF5340 RESET pin when the interface MCU is disconnected |
| SB43 | Open | Short to connect the RESET button to the RESET pin on the Arduino interface |
| SB44 | Open | Short to connect the RESET pin on the Arduino interface to the nRF5340 reset pin |
| SB45 | Open | Short to connect the RESET pin on the Arduino interface to the interface nRF5340 reset pin when the interface MCU is disconnected |
| SB46 | Open | Short to connect the RESET pin on the Arduino interface to the interface MCU Boot when the interface MCU is disconnected |
| SB47 | Open | Short to enable power supply of the external device when using the debug out connector |
| SB48 | Open | Short to bypass the interface MCU USB power switch |
| SB50 | Closed | Cut to disconnect the nRF5340 CTS line from the signal switch and interface MCU |
| SB51 | Closed | Cut to disconnect the nRF5340 RTS line from the signal switch and interface MCU |
| SB52 | Closed | Cut to disconnect the nRF5340 RxD line from the signal switch and the interface MCU |
| SB53 | Closed | Cut to disconnect the nRF5340 TxD line from the signal switch and interface MCU |
| SB54 | Closed | Cut to disconnect the nRF5340 SWDIO line from the signal switch and interface MCU |
| SB55 | Closed | Cut to disconnect the nRF5340 SWDCLK line from the signal switch and interface MCU |
| SB56 | Closed | Cut to disconnect the nRF5340 RESET line from the signal switch and interface MCU |
| SB57 | Closed | Cut to disconnect the nRF5340 SWO line from the signal switch and the interface MCU |
| SB58 | Closed | Cut to disconnect voltage follower from external supply when SW10 is in ON position |
| SB59 | Open | Solder to connect debug in and trace reference voltage to VDD |
| SB60 | Closed | Cut to disconnect debug in and trace reference voltage from VDD_nRF' |
| SB80 | Open | Short to bypass the power switch for the VBUS of nRF5340 |
| SB81 | Open | Short to bypass the power switch for the VDD_HV of nRF5340 |
The following table is a complete overview of the test points on the nRF5340 DK.