si4330 Silicon Laboratories, si4330 Datasheet - Page 122
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si4330
Manufacturer Part Number
si4330
Description
Si4330 Ism Receiver
Manufacturer
Silicon Laboratories
Datasheet
1.SI4330.pdf
(142 pages)
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Register 5Ch. Synthesizer Test
Register 5Bh. VCO Calibration/Override
Si4330
Reset value = 00000000
Reset value = 0x001110
122
Name
Name
Type
Type
Bit
6:0
3:2
Bit
Bit
Bit
7
7
6
5
4
1
0
vcocalov/vcdone
calov/vcdone
dsorder[1:0]
vcocal[6:0]
dsrstmode
dsmdt
enoloop
vcotype
R/W
dsmod
Name
Name
dsmdt
D7
dsrst
vco-
R/W
D7
vcotype
VCO Calibration Override/Done.
When vcocalov = 0 the internal VCO calibration results may be viewed by reading the
vcocal register. When vcocalov = 1 the VCO results may be overridden externally
through the SPI by writing to the vcocal register. Reading this bit gives 1 if the calibration
process has been finished.
VCO Calibration Results.
Enable DSM Dithering.
If low, dithering is disabled.
VCO Type.
0: basic, constant K
1: single varactor, changing K
Open Loop Mode Enable.
Delta-Sigma Modulus.
0: 64 000
1: 65 536
Delta-Sigma Order.
00:
01:
10:
11:
Delta-Sigma Reset Mode.
Delta-Sigma Reset.
D6
R
D6
0 order
1
2
Mash 111
st
nd
order
order
enoloop
R/W
D5
D5
Preliminary Rev 0.2
dsmod
R/W
D4
D4
Function
Function
vcocal[6:0]
D3
R/W
D3
dsorder[1:0]
R/W
D2
D2
dsrstmode
R/W
D1
D1
dsrst
R/W
D0
D0