The nRF7002 Expansion Board (EB) has castellated holes on the side of the board that connect to the nRF7002 companion Integrated Circuit (IC).
The castellated edge holes have 2.540 mm pitch and 17.778 mm row spacing.
The following figure and table show the pinout for the nRF7002 EB.
Figure 1. Castellated edge hole numbering
| Pin | Signal name | Function |
|---|---|---|
| 1 | CLK | QSPI Clock / SPI Clock |
| 2 | CS | QSPI slave select / SPI slave select |
| 3 | D0 | QSPI DATA0 / SPI_MOSI |
| 4 | D1 | QSPI DATA1 / SPI_MISO |
| 5 | D2 | QSPI DATA2 |
| 6 | D3 | QSPI DATA3 |
| 7 | CT0 | SW1_CTRL0 (not supported on nRF7002 EB) |
| 8 | ST1 | Coexistence interface priority signal (only applicable for 4-wire coexistence interface) |
| 9 | GND | Ground |
| 10 | VBAT | Supply voltage |
| 11 | GND | Ground |
| 12 | VIO | IO Supply voltage |
| 13 | ST0 | Coexistence interface status signal |
| 14 | EN | Power enable signal |
| 15 | REQ | Coexistence interface request signal |
| 16 | GRT | Coexistence interface grant signal |
| 17 | IRQ | Host interrupt signal |
| 18 | GND | Ground |
If using the EB only as a breakout board with no need for the PCB edge connector, the PCB edge connector can be broken off. The following figure shows the perforated break-off line at the neck of the connector.
Figure 2. PCB connector break-off line
