ANT_SEL selects the antenna interface used during RX or TX. Antenna interface control is specified in the following table.
| State | ANT_SEL | Description |
|---|---|---|
| Power-down | X | Antenna switches disabled (isolating) |
| Program | X | Antenna switches disabled (isolating) |
| UICR program | X | Antenna switches disabled (isolating) |
| Receive | 0 | ANT1 enabled, ANT2 disabled |
| 1 | ANT1 disabled, ANT2 enabled | |
| Transmit | 0 | ANT1 enabled, ANT2 disabled |
| 1 | ANT1 disabled, ANT2 enabled |