The nRF52 DK has a range of solder bridges for enabling or disabling functionality on the Development Kit (DK). It also has test points available for use. Changes to these are not needed for normal use of the DK.
The following table is an overview of the solder bridges on the nRF52 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 | Closed | Cut for current measurements |
| SB10 | Open | Short to bypass the reverse voltage protection diode on the USB power |
| SB12 | Open | Short to bypass the reverse voltage protection diode on the external supply power |
| SB13 | Closed | Cut to disconnect P0.05 from the connector interface |
| SB14 | Closed | Cut to disconnect P0.06 from the connector interface |
| SB15 | Closed | Cut to disconnect P0.07 from the connector interface |
| SB16 | Closed | Cut to disconnect P0.08 from the connector interface |
| SB17 | Open | Short to connect P0.21 to the connector interface RESET |
| SB18 | Open | Short to permanently enable the I/O expander |
| SB19 | Closed | Cut to permanently disable the I/O expander |
| SB20 | Closed | Cut to isolate SWDIO from nRF52832 to the interface MCU |
| SB21 | Closed | Cut to isolate SWDCLK from nRF52832 to the interface MCU |
| SB22 | Closed | Cut to isolate P0.05 from nRF52832 to the interface MCU |
| SB23 | Closed | Cut to isolate P0.06 from nRF52832 to the interface MCU |
| SB24 | Closed | Cut to isolate P0.07 from nRF52832 to the interface MCU |
| SB25 | Closed | Cut to isolate P0.08 from nRF52832 to the interface MCU |
| SB26 | Closed | Cut to isolate P0.21 from nRF52832 to the interface MCU |
| SB27 | Closed | Cut to isolate P0.18 from nRF52832 to the interface MCU |
| SB29 | Closed | Cut to disable power for interface MCU |
| SB30 | Closed | Cut to isolate P0.17 from I/O expander interrupt line |
| SB32 | Open | Short to supply power through the Debug out connector |
| SB33 | Open | Short to connect the 5V supply from the connector interface to VBUS |
| SB34 | Closed | Cut to disconnect the 5V supply to the connector interface |
| SB35 | Closed | Cut to disconnect VDD supply to the connector interface |
| SB36 | Closed | Cut to disconnect the IF BOOT/RESET button from the IMCU |
| SB41 | Closed | No function on the current BOM |
| SB42 | Open | Short to connect IF BOOT/RESET button to RESET pin on the Arduino interface |
| SB43 | Open | Short to connect the RESET pin on the Arduino interface to the nRF52832 P0.21/RESET pin |
| SB44 | Open | No function on the current BOM |
| SB45 | Open | No function on the current BOM |
The following table is a complete overview of the test points on the nRF52 DK.
| Designator | Signal | Description | Size | Layer |
|---|---|---|---|---|
| TP1 | IMCU_P | USB connector D+ | 1.0 mm | Top |
| TP2 | IMCU_N | USB connector D- | 1.0 mm | Top |
| TP3 | VBUS | USB voltage before power switch | 1.0 mm | Top |
| TP4 | GND | Ground | 1.0 mm | Top |
| TP5 | VCOM0_CTS | UART CTS | 1.0 mm | Top |
| TP6 | VCOM0_RxD | UART RXD | 1.0 mm | Top |
| TP7 | VCOM0_RTS | UART RTS | 1.0 mm | Top |
| TP8 | VCOM0_TxD | UART TXD | 1.0 mm | Top |
| TP9 | SWD3_SWDIO | nRF52832 SWDIO signal, IMCU side of SB20 | 1.0 mm | Top |
| TP10 | SWD3_SWDCLK | nRF52832 SWDCLK signal, IMCU side of SB21 | 1.0 mm | Top |
| TP11 | P0.21 | nRF52832 P0.21/RESET | 1.0 mm | Top |
| TP12 | GND | Ground | Through hole | Top |
| TP13 | GND | Ground | Through hole | Top |
| TP14 | VSUPPLY | Board supply power before power switch | 1.0 mm | Top |
| TP15 | SHIELD_DETECT | Detect signal for Arduino compatible shield | 1.0 mm | Top |
| TP20 | SWD3_RESET | nRF52832 RESET signal, IMCU side of SB26 | 1.0 mm | Top |
| TP21 | SWD3_SWO | nRF52832 SWO signal, IMCU side of SB27 | 1.0 mm | Top |