參數(shù)資料
型號(hào)： 1200
廠商： TEXAS INSTRUMENTS INC
元件分類： 無(wú)繩電話/電話
英文描述： TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, QCC20
封裝： 4 X 4 MM, ROHS COMPLIANT, QLP-20
文件頁(yè)數(shù)： 44/70頁(yè)
文件大?。?/td> 841K
代理商： 1200
Chipcon
SmartRF CC1100
Chipcon AS
SmartRF
CC1100 Preliminary Data Sheet (rev. 1.0) 2005-04-25
Page 49 of 68
0x0B: FSCTRL1 – Frequency synthesizer control
Bit
Field Name
Reset
R/W
Description
7:5
Reserved
R0
4:0
FREQ_IF[4:0]
10 (0x0F)
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.
IF
FREQ
f
XOSC
IF
_
2
10
=
The default value gives an IF frequency of 254kHz,
assuming a 26.0MHz crystal.
0x0C: FSCTRL0 – Frequency synthesizer control
Bit
Field Name
Reset
R/W
Description
7:0
FREQOFF[7:0]
0 (0x00)
R/W
Frequency offset added to the base frequency before being
used by the FS. (2-complement).
Resolution is FXTAL/2
14 (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.
0x0D: FREQ2 – Frequency control word, high byte
Bit
Field Name
Reset
R/W
Description
7:6
FREQ[23:22]
0 (00)
R
FREQ[23:22] is always 0 (the FREQ2 register is less than 36 with
26MHz or higher crystal)
5:0
FREQ[21:16]
30
(0x1E)
R/W
FREQ[23:0] is the base frequency for the frequency synthesiser in
increments of FXOSC/2
16.
[]
0
:
23
2
16
FREQ
f
XOSC
carrier
=
The default frequency word gives a base frequency of 800MHz,
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)
10 (0x0A)
280MHz
300.2MHz-331MHz (101-255)
11 (0x0B)
306MHz
306MHz-347.8MHz (0-209)
14 (0x0E)
384MHz
400.2MHz-435MHz (81-255)
15 (0x0F)
410MHz
410MHz-461MHz (0-255)
16 (0x10)
436MHz
436MHz-463.8MHz (0-139)
17 (0x11)
462MHz
462MHz-463.8MHz (0-9)
30 (0x1E)
800MHz
800.2MHz-851MHz (1-255)
31 (0x1F)
826MHz
826MHz-877MHz (0-255)
32 (0x20)
852MHz
852MHz-903MHz (0-255)
33 (0x21)
878MHz
878MHz-927.8MHz (0-249)
34 (0x22)
904MHz
904MHz-927.8MHz (0-119)
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