RF96 datasheet(88/121 Pages) HOPE

88 / 121 page

Page 88

RF96/97/98

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WIRELESS & SENSING

PRELIMINARY

DATASHEET

Name

(Address)

Bits

Variable Name

Mode

Default

value

FSK/OOK Description

RegFrfMsb

(0x06)

7-0

Frf(23:16)

0x6c

MSB of the RF carrier frequency

RegFrfMid

(0x07)

7-0

Frf(15:8)

0x80

MSB of the RF carrier frequency

RegFrfLsb

(0x08)

7-0

Frf(7:0)

0x00

LSB of RF carrier frequency

Frf = Fstep × Frf(23;0)

Default value: 434.000 MHz

The RF frequency is taken into account internally only when:

- entering FSRX/FSTX modes

- re-starting the receiver

Registers for the Transmitter

RegPaConfig

(0x09)

PaSelect

0x00

Selects PA output pin

0  RFO pin. Maximum power of +14 dBm

1  PA_BOOST pin. Maximum power of +20 dBm

6-4

MaxPower

0x04

Select max output power: Pmax=10.8+0.6*MaxPower [dBm]

3-0

OutputPower

0x0f

Pout=Pmax-(15-OutputPower) if PaSelect = 0 (RFO pins)

Pout=17-(15-OutputPower)

if PaSelect = 1 (PA_BOOST pin)

RegPaRamp

(0x0A)

unused

0x00

unused

6-5

ModulationShaping

0x00

Data shaping:

In FSK:

00  no shaping

01  gaussian filter BT = 1.0

10  gaussian filter BT = 0.5

11  gaussian filter BT = 0.3

In OOK:

00  no shaping

01  filtering with fcutoff = bit_rate

10  filtering with fcutoff = 2*bit_rate (for bit_rate < 125 kb/s)

11  reserved

reserved

0x00

reserved

3-0

PaRamp

0x09

Rise/Fall time of ramp up/down in FSK

0000  3.4 ms

0001  2 ms

0010  1 ms

0011  500 us

0100  250 us

0101  125 us

0110  100 us

0111  62 us

1000  50 us

1001  40 us (d)

1010  31 us

1011  25 us

1100  20 us

1101  15 us

1110  12 us

1111  10 us

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