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MRF49XA-I/T датащи(PDF) 23 Page - Microchip Technology

номер детали MRF49XA-I/T
подробное описание детали  ISM Band Sub-GHz RF Transceiver
PDF  102 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MRF49XA-I/T датащи(HTML) 23 Page - Microchip Technology

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© 2009-2011 Microchip Technology Inc.
Preliminary
DS70590C-page 23
MRF49XA
REGISTER 2-4:
TXCREG: TRANSMIT CONFIGURATION REGISTER (POR: 0x9800)
W-1
W-0
W-0
W-1
W-1
W-0
W-0
W-0
CCB<15:9>
MODPLY
bit 15
bit 8
W-0
W-0
W-0
W-0
W-0
W-0
W-0
W-0
MODBW<3:0>
r
OTXPWR<2:0>
bit 7
bit 0
Legend:
r = reserved bit
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
bit 15-9
CCB<15:9>: Command Code bits
The command code bits (1001100b) are serially sent to the microcontroller to identify the bits to be
written in the TXCREG.
bit 8
MODPLY: Modulation Polarity bit (for FSK)
When MODPLY is configured as high/low:
1 = Logic ‘0’ is the higher channel frequency and logic ‘1’ is the lower channel frequency (negative
deviation)
0 = Logic ‘0’ is the lower channel frequency and logic ‘1’ is the higher channel frequency (positive
deviation)
bit 7-4
MODBW<3:0>: Modulation Bandwidth bits
These bits set the FSK frequency deviation for transmitting the logic ‘1’ and logic ‘0’(1).
1111 = 240 kHz
1110 = 225 kHz
1101 = 210 kHz
1100 = 195 kHz
1011 = 180 kHz
1010 = 165 kHz
1001 = 150 kHz
1000 = 135 kHz
0111 = 120 kHz
0110 = 105 kHz
0101 = 90 kHz
0100 = 75 kHz
0011 = 60 kHz
0010 = 45 kHz
0001 = 30 kHz
0000 = 15 kHz
bit 3
Reserved: Write as ‘0’
Note 1: The transmitter FSK modulation parameters are used for calculating the resulting output frequency, as
shown in Equation 2-1.
2: The output transmit power range is relative to the maximum available power, which depends on the actual
antenna impedance.



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