| B7 |
stby |
1 = Standby mode |
Standby mode keeps all supply regulators and the 13.56-MHz SYS_CLK oscillator running (typical start-up time to full operation is 100 µs). |
| 0 = Active mode |
Active mode (default) |
| B6 |
direct |
1 = Direct mode 0 or 1 |
Provides user direct access to AFE (direct mode 0) or lets the user add custom framing (direct mode 1). Bit 6 of the ISO Control register must be set before entering direct mode 0 or 1. |
| 0 = ISO mode (default) |
Uses SPI or parallel communication with automatic framing and ISO decoders |
| B5 |
rf_on |
1 = RF output active |
Transmitter on, receivers on |
| 0 = RF output not active |
Transmitter off |
| B4 |
rf_pwr |
1 = Half output power |
TX_OUT (pin 5) = 8-Ω output impedance
P = 100 mW (+20 dBm) at 5 V, P = 33 mW (+15 dBm) at 3.3 V
|
| 0 = Full output power |
TX_OUT (pin 5) = 4-Ω output impedance
P = 200 mW (+23 dBm) at 5 V, P = 70 mW (+18 dBm) at 3.3 V
|
| B3 |
pm_on |
1 = Selects aux RX input |
RX_IN2 input is used |
| 0 = Selects main RX input |
RX_IN1 input is used |
| B2 |
Reserved |
| |
| B1 |
rec_on |
1 = Receiver activated for external field measurement |
Forces enabling of receiver and TX oscillator. Used for external field measurement. |
| 0 = Automatic enable |
Allows enable of the receiver by bit 5 of this register |
| B0 |
vrs5_3 |
1 = 5-V operation |
Selects the VIN voltage range |
| 0 = 3-V operation |