CC2400 Chipcon AS, CC2400 Datasheet - Page 54

• Manufacturer Part Number: CC2400
• Description: 2.4 GHz RF Transceiver
• Manufacturer: Chipcon AS

FSCTRL (0x01) - Frequency Synthesiser Control and Status
15:6
5:4
3
2
1
0
FSDIV (0x02) - Frequency Synthesiser Frequency Division Control
15:12
11:10
9:0
MDMCTRL (0x03) - Modem Control and Status
15:13
12:7
6:0
Chipcon AS
Bit
Bit
Bit
Field Name
-
LOCK_THRESHOLD[1:0]
CAL_DONE
CAL_RUNNING
LOCK_LENGTH
LOCK_STATUS
Field Name
-
FREQ[11:10]
FREQ[9:0]
Field Name
-
MOD_OFFSET[5:0]
MOD_DEV[6:0]
SmartRF
®
CC2400 PRELIMINARY Datasheet (rev. 1.1), 2003-10-02
Reset
0
1
0
0
0
0
Reset
0
2
353
Reset
0
0
64
R/W
W0
R/W
R
R
R/W
R
R/W
W0
R
R/W
R/W
W0
R/W
R/W
SmartRF
Description
Reserved, write as 0.
Number of consecutive reference clock periods with successful
sync windows required to indicate lock:
0: 64
1: 128
2: 256
3: 512
Calibration has been performed since the last time the FS was
turned on.
Calibration status, '1' when calibration in progress.
LOCK_WINDOW pulse width:
0: 2 CLK_PRE periods
1: 4 CLK_PRE periods
'1' when PLL is in lock, otherwise '0'.
Description
Reserved, write as 0.
Read only.
Directly gives the right frequency in MHz when reading/writing
FREQ[11:0]
Frequency control word.
where f
description of how to program the channel for tansmit and
receive modes respectively.
Reading/writing
in MHz.
The default value corresponds to f
Description
Reserved, write as 0.
Modulator/Demodulator centre frequency in 15.625 kHz steps
(for the receiver the steps are relative to 1 MHz, for the
transmitter the steps are relative to 0MHz when
MDMTST0.TX_1MHZ_OFFSET_N=1 ).
Two's complement signed value. I.e.
centre frequency=1.48 MHz;
frequency=0.50 MHz.
Modulator frequency deviation in 3.9062 kHz steps (0-500 kHz).
Unsigned value. Reset value gives a deviation of 250 kHz.
f
c
=
FREQ
c
is the channel centre frequency. See page 45 for a
[
11
.
0 :
FREQ[11:0]D
]
=
2048
®
+
MOD_OFFSET
FREQ
CC2400
irectly gives the right frequency
c
=2401MHz.
[
MOD_OFFSET
9
0 :
Page 54 of 73
]
=0x40
[MHz]
=0x3F
centre