The nRF9161 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 a complete overview of the solder bridges on the nRF9161 DK.
| Solder bridge | Default | Function |
|---|---|---|
| SB1 | Closed | Short to power GNSS LNA from VDD domain, cut SB2 |
| SB2 | Open | Cut to disconnect VDD_GPIO supply from GNSS LNA |
| SB3 | Closed | Cut to disconnect RXD of UART1 from nRF9161 SiP |
| SB4 | Closed | Cut to disconnect TXD of UART1 from nRF9161 SiP |
| SB5 | Closed | Cut to disconnect RTS of UART1 from nRF9161 SiP |
| SB6 | Closed | Cut to disconnect CTS of UART1 from nRF9161 SiP |
| SB7 | Closed | Cut to disconnect RXD of UART2 from nRF9161 SiP |
| SB8 | Closed | Cut to disconnect TXD of UART2 from nRF9161 SiP |
| SB9 | Closed | Cut to disconnect RTS of UART2 from nRF9161 SiP |
| SB10 | Closed | Cut to disconnect CTS of UART2 from nRF9161 SiP |
| SB12 | Closed | Short to permanently connect SIM VDD, bypass SIM current measurement connector |
| SB13 | Closed | Close to reroute SIMDATA to pin2 of MFF2 |
| SB14 | Closed | Cut to disconnect SIMDATA from pin3 of MFF2 |
| SB15 | Closed | Short to use VIO_REF rail as power source of debug connector |
| SB16 | Open | Short to connect the RESET button to the RESET pin on the Arduino interface |
| SB17 | Open | SWD1 SELECT pulldown |
| SB20 | Open | Close to set UART 1 power source to VDD of the DK |
| SB21 | Open | Cut to disconnect RESET from P7 |
| SB22 | Open | Short to connect RESET to P1 |
| SB23 | Closed | Cut to disconnect RESET from P7 |
| SB24 | Open | Cut to disconnect RESET from AREF on P4 and P10 |
| SB25 | Open | Cut to disconnect RESET_P5_BOTTOM from RESET_BOTTOM |
| SB26 | Closed | Short to connect RESET_P5_BOTTOM to RESET_P5_TOP |
| SB27 | Open | Short to connect RESET_BOTTOM to RESET_TOP |
| SB28 | Open | Short to disconnect RESET_P5_BOTTOM from RESET_TOP |
| SB29 | Open | Short to permanently enable USB_DETECT signal |
| SB30 | Open | Cut to disconnect VIO supply |
| SB31 | Open | Cut to disconnect VDD_GPIO supply |
| SB32 | Closed | Cut to disconnect VDD_IMCU supply |
| SB33 | Closed | Cut to disconnect the VSUPPLY and VDD_nRF' |
| SB34 | Open | Short to connect VDD_nRF and VDD_nRF' |
| SB35 | Closed | Cut to separate VDD_5V and 5V domains |