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Nordic Semiconductor /nrf52820 /RADIO /DFECTRL1

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Interpret as DFECTRL1

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31 2827 2423 2019 1615 1211 87 43 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0NUMBEROF8US0 (Payload)DFEINEXTENSION 0TSWITCHSPACING 0TSAMPLESPACINGREF 0 (IQ)SAMPLETYPE 0TSAMPLESPACING 0 (NoRepeat)REPEATPATTERN 0AGCBACKOFFGAIN

DFEINEXTENSION=Payload, REPEATPATTERN=NoRepeat, SAMPLETYPE=IQ

Description

Various configuration for Direction finding

Fields

NUMBEROF8US

Length of the AoA/AoD procedure in number of 8 us units
DFEINEXTENSION

Add CTE extension and do antenna switching/sampling in this extension

0 (Payload): Antenna switching/sampling is done in the packet payload

1 (CRC): AoA/AoD procedure triggered at end of CRC
TSWITCHSPACING

Interval between every time the antenna is changed in the SWITCHING state

1 (4us): 4us

2 (2us): 2us

3 (1us): 1us
TSAMPLESPACINGREF

Interval between samples in the REFERENCE period

1 (4us): 4us

2 (2us): 2us

3 (1us): 1us

4 (500ns): 0.5us

5 (250ns): 0.25us

6 (125ns): 0.125us
SAMPLETYPE

Whether to sample I/Q or magnitude/phase

0 (IQ): Complex samples in I and Q

1 (MagPhase): Complex samples as magnitude and phase
TSAMPLESPACING

Interval between samples in the SWITCHING period when CTEINLINECTRLEN is 0

1 (4us): 4us

2 (2us): 2us

3 (1us): 1us

4 (500ns): 0.5us

5 (250ns): 0.25us

6 (125ns): 0.125us
REPEATPATTERN

Repeat each individual antenna pattern N times sequentially, i.e. P0, P0, P1, P1, P2, P2, P3, P3, etc.

0 (NoRepeat): Do not repeat (1 time in total)
AGCBACKOFFGAIN

Gain will be lowered by the specified number of gain steps at the start of CTE

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Register Reference

https://github.com/cmsis-svd/cmsis-svd-data