CC2510FX Datasheet, PDF (224/253 Pages) List of Unclassifed Manufacturers – True System-on-Chip with Low Power RF Transceiver and 8051 MCU

CC2510Fx / CC2511Fx
Bit Field Name
7:5 -
4:0 FREQ_IF[4:0]
0xDF07: FSCTRL1 – Frequency synthesizer control
Reset
R/W Description
000
01111
R0 Not used
R/W The desired IF frequency to employ in RX. Subtracted from
FS base frequency in RX and controls the digital complex
mixer in the demodulator.
f _IF
=
f _XOSC
2¹⁰
⋅ FREQ _ IF
The default value gives an IF frequency of 381kHz,
assuming a 26.0MHz crystal.
0xDF08: FSCTRL0 – Frequency synthesizer control
Bit Field Name
Reset R/W Description
7:0 FREQOFF[7:0]
0x00
R/W Frequency offset added to the base frequency before being
used by the FS. (2-complement).
Resolution is F_XTAL/2¹⁴ (1.5kHz-1.7kHz); range is ±186kHz
to ±217kHz, dependent of XTAL frequency.
The SAFC strobe command and the automatic AFC
mechanism add the current FREQEST value to FREQOFF.
Bit Field Name
7:6 FREQ[23:22]
5:0 FREQ[21:16]
0xDF09: FREQ2 – Frequency control word, high byte
Reset R/W Description
00
0x1E
R
FREQ[23:22] is always binary 01 (the FREQ2 register is in the range
85 to 95 with 26MHz-28MHz crystal)
R/W FREQ[23:0] is the base frequency for the frequency synthesizer in
increments of F_XOSC/2¹⁶.
[ ] f_carrier
=
f _XOSC
2¹⁶
⋅ FREQ 23 : 0
The default frequency word gives a base frequency of 2464MHz,
assuming a 26.0MHz crystal. With the default channel spacing settings,
the following FREQ2 values and channel numbers can be used:
FREQ2 Base frequency Frequency range (CHAN numbers)
91 (0x5B)
2386MHz
2400.2MHz-2437MHz (71-255)
92 (0x5C)
2412MHz
2412MHz-2463MHz (0-255)
93 (0x5D)
2438MHz
2431MHz-2483.4MHz (0-227)
94 (0x5E)
2464MHz
2464MHz-2483.4MHz (0-97)
Bit Field Name
7:0 FREQ[15:8]
0xDF0A: FREQ1 – Frequency control word, middle byte
Reset
R/W Description
0xC4
R/W Ref. FREQ2 register
CC2510Fx/CC2511Fx PRELIMINARY Data Sheet (Rev. 1.2) SWRS055A Page 224 of
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