ADF7020-1 Datasheet, PDF (39/48 Pages) Analog Devices – High Performance FSK/ASK Transceiver IC

REGISTER 7—READBACK SET-UP REGISTER
ADF7020-1
READBACK
SELECT
ADC
MODE
CONTROL
BITS
DB8
RB3
DB7
RB2
DB6
RB1
DB5
AD2
DB4 DB3 DB2 DB1 DB0
AD1 C4(0) C3(1) C2(1) C1(1)
RB3 READBACK
0 DISABLED
1 ENABLED
RB2 RB1 READBACK MODE
0 0 AFC WORD
0 1 ADC OUTPUT
1 0 FILTER CAL
1 1 SILICON REV
Figure 50.
AD2 AD1 ADC MODE
0 0 MEASURE RSSI
0 1 BATTERY VOLTAGE
1 0 TEMP SENSOR
1 1 TO EXTERNAL PIN
Notes
1. Readback of the measured RSSI value is valid only in Rx mode. To enable readback of the battery voltage, the temperature sensor, or
the voltage at the external pin in Rx mode, users must disable the AGC function in Register 9. To read back these parameters in Tx
mode, users must first power up the ADC using Register 8, because it is off by default in Tx mode to save power. This is the
recommended method of using the battery readback function since most configurations typically require use of the AGC function.
2. Readback of the AFC word is valid in Rx mode only if either the linear demodulator or the correlator/demodulator is active.
3. See the Readback Format section for more information.
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