MRF39RA datasheet(48/72 Pages) MICROCHIP

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MRF39RA

DS40001778B-page 48

 2015 Microchip Technology Inc.

RegAfcFei

(0x1E)

7—

Unused

FeiDone

00  FEI is on-going

1  FEI finished

FeiStart

Triggers a FEI measurement when set.

Always reads ‘0’.

4AfcDone

10  AFC is on-going

1  AFC has finished

AfcAutoclearOn

Only valid if AfcAutoOn is set

0  AFC register is not cleared before a

new AFC phase

1  AFC register is cleared before a

new AFC phase

AfcAutoOn

00  AFC is performed each time

AfcStart is set

1  AFC is performed each time Rx

mode is entered

AfcClear

Clears the AfcValue if set in Rx mode.

Always reads ‘0’.

0AfcStart

Triggers an AFC when set. Always reads

‘0’.

RegAfcMsb

(0x1F)

7-0

AfcValue(15:8)

0x00

MSB of the AfcValue, two’s complement

format

RegAfcLsb

(0x20)

7-0

AfcValue(7:0)

0x00

LSB of the AfcValue, two’s complement

format

Frequency correction = AfcValue x Fstep

RegFeiMsb

(0x21)

7-0

FeiValue(15:8)

—

MSB of the measured frequency offset,

two’s complement

RegFeiLsb

(0x22)

7-0

FeiValue(7:0)

—

LSB of the measured frequency offset,

two’s complement

Frequency error = FeiValue x Fstep

RegRssiConfig

(0x23)

7-2

—

000000 Unused

RssiDone

10  RSSI is on-going

1  RSSI sampling is finished, result

available

RssiStart

Trigger a RSSI measurement when set.

Always reads ‘0’.

RegRssiValue

(0x24)

7-0

RssiValue

0xFF

Absolute value of the RSSI in dBm,

0.5 dB steps.

RSSI = -RssiValue/2 [dBm]

TABLE 5-3:

RECEIVER REGISTERS (CONTINUED)

Name

(Address)

Bits

Variable Name

Mode

Default

Value

Description

MRF39RA Datasheet(PDF) 48 Page - Microchip Technology

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