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CC2550-RTY1 数据表(PDF) 43 Page - Texas Instruments

部件名 CC2550-RTY1
功能描述  Low-Cost Low-Power 2.4 GHz RF Transmitter
PDF  62 Pages
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制造商  TI2 [Texas Instruments]
网页  https://www.ti.com
标志 TI2 - Texas Instruments

CC2550-RTY1 数据表(HTML) 43 Page - Texas Instruments

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CC2550
SWRS039B
Page 43 of 58
0x0A: CHANNR – Channel Number
Bit
Field Name
Reset
R/W
Description
7:0
CHAN[7:0]
0 (0x00)
R/W
The 8-bit unsigned channel number, which is multiplied by
the channel spacing setting and added to the base
frequency.
0x0D: FREQ2 – Frequency Control Word, High Byte
Bit
Field Name
Reset
R/W
Description
7:6
FREQ[23:22]
1 (01)
R
FREQ[23:22] is always binary 01 (the FREQ2 register is in the range
85 to 95 with 26-27 MHz crystal)
5:0
FREQ[21:16]
30
(0x1E)
R/W
FREQ[23:0] is the base frequency for the frequency synthesiser in
increments of FXOSC/2
16.
[]
0
:
23
2
16
FREQ
f
f
XOSC
carrier
⋅
=
0x0E: FREQ1 – Frequency Control Word, Middle Byte
Bit
Field Name
Reset
R/W
Description
7:0
FREQ[15:8]
196 (0xC4)
R/W
Ref. FREQ2 register
0x0F: FREQ0 – Frequency Control Word, Low Byte
Bit
Field Name
Reset
R/W
Description
7:0
FREQ[7:0]
236 (0xEC)
R/W
Ref. FREQ2 register
0x10: MDMCFG4 – Modulator Configuration
Bit
Field Name
Reset
R/W
Description
7:4
Reserved
R0
Defined in the transceiver version
3:0
DRATE_E[3:0]
12 (1100)
R/W
The exponent of the user specified symbol rate
0x11: MDMCFG3 – Modulator Configuration
Bit
Field Name
Reset
R/W
Description
7:0
DRATE_M[7:0]
34 (0x22)
R/W
The mantissa of the user specified symbol rate. The symbol
rate is configured using an unsigned, floating-point number
with 9-bit mantissa and 4-bit exponent. The 9
th bit is a
hidden ‘1’. The resulting data rate is:
(
)
XOSC
E
DRATE
DATA
f
M
DRATE
R
⋅
⋅
+
=
28
_
2
2
_
256
The default values give a data rate of 115.051 kBaud
(closest setting to 115.2 kBaud), assuming a 26.0 MHz
crystal.



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