RF98 datasheet(90/121 Pages) HOPE

90 / 121 page

Page 90

RF96/97/98

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WIRELESS & SENSING

PRELIMINARY

DATASHEET

Name

(Address)

Bits

Variable Name

Mode

Default

value

FSK/OOK Description

RegRxConfig

(0x0d)

RestartRxOnCollision

0x00

Turns on the mechanism restarting the receiver automatically if it

gets saturated or a packet collision is detected

0  No automatic Restart

1  Automatic restart On

RestartRxWithoutPllLock

0x00

Triggers a manual Restart of the Receiver chain when set to 1.

Use this bit when there is no frequency change,

RestartRxWithPllLock otherwise.

RestartRxWithPllLock

0x00

Triggers a manual Restart of the Receiver chain when set to 1.

Use this bit when there is a frequency change, requiring some

time for the PLL to re-lock.

AfcAutoOn

0x00

0  No AFC performed at receiver startup

1  AFC is performed at each receiver startup

AgcAutoOn

0x01

0  LNA gain forced by the LnaGain Setting

1  LNA gain is controlled by the AGC

2-0

RxTrigger

0x06

Selects the event triggering AGC and/or AFC at receiver startup.

See Table 18 for a description.

RegRssiConfig

(0x0e)

7-3

RssiOffset

0x00

Signed RSSI offset, to compensate for the possible losses/gains

in the front-end (LNA, SAW filter...)

1dB / LSB, 2

‟s complement format

2-0

RssiSmoothing

0x02

Defines the number of samples taken to average the RSSI result:

000  2 samples used

001  4 samples used

010  8 samples used

011  16 samples used

100  32 samples used

101  64 samples used

110  128 samples used

111  256 samples used

RegRssiCollision

(0x0f)

7-0

RssiCollisionThreshold

0x0a

Sets the threshold used to consider that an interferer is detected,

witnessing a packet collision. 1dB/LSB (only RSSI increase)

Default: 10dB

RegRssiThresh

(0x10)

7-0

RssiThreshold

0xff

RSSI trigger level for the Rssi interrupt:

- RssiThreshold / 2 [dBm]

RegRssiValue

(0x11)

7-0

RssiValue

Absolute value of the RSSI in dBm, 0.5dB steps.

RSSI = - RssiValue/2 [dBm]

RegRxBw

(0x12)

unused

6-5

reserved

0x00

reserved

4-3

RxBwMant

0x02

Channel filter bandwidth control:

00  RxBwMant = 16

10  RxBwMant = 24

01  RxBwMant = 20

11  reserved

2-0

RxBwExp

0x05

Channel filter bandwidth control:

FSK Mode:

RxBw = ------------------------

----

-------------------------

RxBwMant × 2

RxBwEx p + 2

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