MRF39RA Datasheet, PDF(46/72 Page) Microchip Technology – Low-Power, Integrated UHF Receiver

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

MRF39RA Datasheet, PDF (46/72 Pages) Microchip Technology – Low-Power, Integrated UHF Receiver

◁

MRF39RA

5.3 Receiver Registers

TABLE 5-3:

Name

(Address)

Reserved14

(0x14)

Reserved15

(0x15)

Reserved16

(0x16)

Reserved17

(0x17)

RegLna

(0x18)

RECEIVER REGISTERS

Bits

Variable Name

7-0 â

7 LnaZin

6â

5-3 LnaCurrentGain

2-0 LnaGainSelect

RegRxBw

(0x19)

7-5 DccFreq

4-3 RxBwMant

2-0 RxBwExp

Mode

Default

Value

0x40 Unused

Description

0xB0 Unused

0x7B Unused

0x9B Unused

1* LNAâs input impedance

0 ï 50 Ohms

1 ï 200 Ohms

0 Unused

001 Current LNA gain set either manually or

by the AGC

000 LNA gain setting:

000 ï Gain set by the internal AGC

loop

001 ï G1 = Highest gain

010 ï G2 = Highest gain â 6 dB

011 ï G3 = Highest gain â 12 dB

100 ï G4 = Highest gain â 24 dB

101 ï G5 = Highest gain â 36 dB

110 ï G6 = Highest gain â 48 dB

111 ï Reserved

rw 010* Cut-off frequency of the DC offset

canceler (DCC):

fc = -2---ï°-----ï´4----2-ï´---D--R-c---xc--F-B--r--w-e--q----+---2-

~4% of the RxBw by default

10 Channel filter bandwidth control:

* 00 ï RxBwMant = 16

10 ï RxBwMant = 24

01 ï RxBwMant = 20

11 ï Reserved

101 Channel filter bandwidth control:

* FSK mode:

RxBw = R-----x---B----w----M-----a---F-n---Xt---ï´-O----2S---R-C--x---B---w----E---x--p----+---2-

OOK mode:

RxBw = R-----x---B----w----M-----a---F-n---Xt---ï´-O----2S---R-C--x---B---w----E---x--p----+---3-

See Table 2-3 for tabulated values.

DS40001778B-page 46

ï£ 2015 Microchip Technology Inc.

▷