Texas Instruments CC2500 User Manual

CC2500
S
WRS040
C
Page
68
of
89
0x13: MDMCFG1
–
Modem
C
onfiguration
Bit
Field Name
Reset
R/W
Description
7
FEC_EN
0
R/W
Enable Forward Error Correction (FEC) with interleaving for
packet payload
0 = Disable
1 = Enable
(Only supported for fix
ed packet length mode, i.e.
PKTCTRL0.LENGTH_CONFIG
=0
)
6:4
NUM_PREAMBLE[2:0]
2 (010)
R/W
Sets the minimum number of preamble bytes to be transmitted
Setting
Number of preamble bytes
0 (000)
2
1 (001)
3
2 (010)
4
3 (011)
6
4 (100)
8
5 (101)
12
6 (110)
16
7 (111)
24
3:2
Reserved
R0
1:0
CHANSPC_E[1:0]
2 (10)
R/W
2 bit exponent of channel spacing
0x14: MDMCFG0
–
Modem
C
onfiguration
Bit
Field Name
Reset
R/W
Description
7:0
CHANSPC_M[7:0]
248 (0xF8)
R/W
8
-
bit mantiss
a of channel spacing. The channel spacing is
multiplied by the channel number CHAN and added to the base
frequency. It is unsigned and has the format:


E
CHANSPC
XOSC
CHANNEL
M
CHANSPC
f
f
_
18
2
_
256
2





The default values give 199.951 kHz channel spacing (the closest
setting to 200 kHz
), assuming 26.0 MHz crystal frequency.

Texas Instruments CC2500 Specifications

General

Brand	Texas Instruments
Model	CC2500
Category	Transceiver
Language	English