TRC101 Просмотр технического описания (PDF) - RF Monolithics, Inc
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TRC101 Datasheet PDF : 33 Pages
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Transmit Configuration Register [POR=9800h]
Bit Bit Bit Bit Bit Bit Bit Bit
Bit Bit Bit Bit Bit Bit
Bit
Bit
15 14 13 12 11 10 9
8
7
6
5
43 2
1
0
1 0 0 1 1 0 0 MODP DEV3 DEV2 DEV1 DEV0 0 PWR2 PWR1 PWR0
The Transmit Configuration Register configures:
• Modulation Polarity
• Modulation Bandwidth
• Output Transmit Power
Bit [15..9] - Command Code: These bits are the command code that is sent serially to the processor that
identifies the bits to be written to the Transmit Configuration Register.
Bit [8] – Modulation Polarity: When clear, a logic ‘0’ is defined as the lower channel frequency and a
logic ‘1’ as the higher channel frequency (positive deviation). When set, a logic ‘0’ is defined as the
higher channel frequency and a logic ‘1’ as the lower channel frequency (negative deviation).
Bit [7..4] – Modulation Bandwidth: These bits set the FSK frequency deviation for transmitting a logic ‘1’
and logic ‘0’. The deviation is programmable from 15kHz to 240kHz in 15kHz steps. See Table 7 below
for deviation settings.
TABLE 7.
Modulation Bandwidth Hex DEV3 DEV2 DEV1 DEV0
15 kHz
0
0
0
0
0
30 kHz
1
0
0
0
1
45 kHz
2
0
0
1
0
60 kHz
3
0
0
1
1
75 kHz
4
0
1
0
0
90 kHz
5
0
1
0
1
105 kHz
6
0
1
1
0
120 kHz
7
0
1
1
1
135 kHz
8
1
0
0
0
150 kHz
9
1
0
0
1
165 kHz
A
1
0
0
0
180 kHz
B
1
0
1
1
195 kHz
C
1
1
1
0
210 kHz
D
1
1
0
1
225 kHz
E
1
1
1
0
240 kHz
F
1
1
1
1
Bit [3] – Not used. Write as logic ‘0’.
Bit [2..0] – Output Transmit Power: These bits set the transmit output power. The output power is
programmable from Max to -21dB in -3dB steps. See Table 8 below for Output Power settings.
TABLE 8.
Output Power (Relative) PWR2
Max
0
-3dB
0
-6dB
0
-9dB
0
-12dB
1
-15dB
1
-18dB
1
-21dB
1
PWR1
0
0
1
1
0
0
1
1
PWR0
0
1
0
1
0
1
0
1
16
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