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CC2550-RTY1 数据表(PDF) 41 Page - Texas Instruments

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部件名 CC2550-RTY1
功能描述  Single Chip Low Cost Low Power RF Transmitter
PDF  55 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

CC2550-RTY1 数据表(HTML) 41 Page - Texas Instruments

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CC2550
PRELIMINARY Data Sheet (Rev.1.2)
SWRS039A
Page 41 of 54
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 kbps (closest
setting to 115.2 kbps), assuming a 26.0 MHz crystal.
0x12: MDMCFG2 – Modulator configuration
Bit
Field Name
Reset
R/W
Description
7
Reserved
R0
6:4
MOD_FORMAT[2:0]
1 (001)
R/W
The modulation format of the radio signal
Setting
Modulation format
0 (000)
FSK
1 (001)
GFSK
2 (010)
-
3 (011)
OOK
4 (100)
-
5 (101)
-
6 (110)
-
7 (111)
MSK
3
MANCHESTER_EN
0
R/W
Enables Manchester encoding/decoding
0 = Disable
1 = Enable
2:0
SYNC_MODE[2:0]
2 (010)
R/W
Combined sync-word qualifier mode.
The values 0 (000) and 4 (100) disables preamble
and sync word transmission. The values 1 (001), 2
(001), 5 (101) and 6 (110) enables 16-bit sync word
transmission. The values 3 (011) and 7 (111)
enables repeated sync word transmission. The table
below lists the meaning of each mode (for
compatibility with the
CC2500 transceiver):
Setting
Sync-word qualifier mode
0 (000)
No preamble/sync word
1 (001)
15/16 sync word bits detected
2 (010)
16/16 sync word bits detected
3 (011)
30/32 sync word bits detected
4 (100)
No preamble/sync, carrier-sense
above threshold
5 (101)
15/16 + carrier-sense above threshold
6 (110)
16/16 + carrier-sense above threshold
7 (111)
30/32 + carrier-sense above threshold



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