MRF89XA datasheet(49/140 Pages) MICROCHIP

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 2010-2017 Microchip Technology Inc.

Preliminary

DS70000622D-page 49

MRF89XA

2.18

Transmitter Configuration Registers

2.18.1

TRANSMIT PARAMTER CONFIGURATION REGISTER DETAILS

TXCONREG: TRANSMIT PARAMETER CONFIGURATION REGISTER

(ADDRESS:0x1A) (POR:0x7C)

R/W-0

R/W-1

R/W-0

TXIPOLFV<3:0>

TXOPVAL<2:0>

—

bit 7

bit 0

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

r = Reserved

bit 7-4

TXIPOLFV<3:0>: Transmission Interpolation Filter Cut Off Frequency Value bits

These bits control the cut-off frequency (fc) of the interpolation filter in the transmission path.

TXIPOLFV<3:0> = 0111  fc = 200 kHz (default)

Where,

TXIPOLFV <3:0> is the value in the register.

fc is the cut-off frequency.

fo is the local oscillator frequency (center frequency).

fxtal is the crystal oscillator frequency.

bit 3-1

TXOPVAL<2:0>: Transmit Output Power Value bits (1 step ≈ 3dB)

111 = -8 dBm

110 = -5 dBm

101 = -2 dBm

100 = 1 dBm

011 = 4 dBm

010 = 7 dBm

001 = 10 dBm (default)

000 = 13 dBm

bit 0

Reserved: Reserved bit; do not use

0 = Reserved (default)

200 kHz

fxtalMHz

12.8MHz

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





 val TXIPOLFV

 1



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





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