CC115LRTKT Datasheet, PDF (47/60 Pages) Texas Instruments – Value Line Transmitter

CC115L
Bit Field Name
7:0 CHANSPC_M[7:0]
0x14: MDMCFG0 - Modem Configuration
Reset
248 (0xF8)
R/W Description
R/W 8-bit mantissa 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:
f _CHANNEL
f _XOSC
2¹⁸
(256
CHANSPC _ M ) 2^{CHANSPC _ E}
The default values give 199.951 kHz channel spacing (the closest
setting to 200 kHz), assuming 26.0 MHz crystal frequency.
Bit Field Name
7
6:4 DEVIATION_E[2:0]
3
2:0 DEVIATION_M[2:0]
0x15: DEVIATN - Modem Deviation Setting
Reset
R/W Description
4 (100)
7 (111)
R0 Not used.
R/W Deviation exponent.
R0 Not used.
R/W 2-FSK/
GFSK/
4-FSK
Specifies the nominal frequency deviation from the carrier
for
a „0‟ (-DEVIATN) and „1‟ (+DEVIATN) in a mantissa-
exponent format, interpreted as a 4-bit value with MSB
implicit 1. The resulting frequency deviation is given by:
f _dev
f _xosc
2¹⁷
(8
DEVIATION _ M ) 2^{DEVIATION _ E}
The default values give ±47.607 kHz deviation assuming
26.0 MHz crystal frequency.
OOK
This setting has no effect
0x17: MCSM1 - Main Radio Control State Machine Configuration
Bit Field Name
Reset
R/W Description
7:6
5:2
1:0 TXOFF_MODE[1:0]
3 (1100)
0 (00)
R0 Not used
R/W Use setting from SmartRF Studio [4]
R/W Select what should happen when a packet has been sent
Setting
Next state after finishing packet transmission
0 (00)
IDLE
1 (01)
FSTXON
2 (10)
Stay in TX (start sending preamble)
3 (11)
Reserved
SWRS105A
Page 47 of 54