ICS1522 Просмотр технического описания (PDF) - Integrated Circuit Systems
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ICS1522
Integrated Circuit Systems
ICS1522 Datasheet PDF : 13 Pages
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ICS1522
REG#
5
5
5
5
5
6
BIT(S)
4-5
6-7
8
9
10
0-2
BIT REF.
PDA(0:1)
DESCRIPTION
Output Post-scaler (Default=0)
Input=VCO; Output = Differential Output
PFD(2)
0
0
1
1
PFD(0)
0
1
0
1
DIVIDE BY
8
4
2
1
PDB(0:1)
LD_LG
F_EN
RESERVED
L(0:2)
Feedback Post-scaler (Default=3)
Input=Feedback Divider; Output=PFD
PDB(1)
0
0
1
1
PDB(0)
0
1
0
1
DIVIDE BY
8
4
2
1
Fine Phase Adjust Lead/Lag (Default=1)
1=FBK will lag REF at input to PFD
0=FBK will lead REF at input to PFD
Fine Phase Adjust Enable (Default=))
0=Disable; 1=Enable
Must be set to one.
Load Counter (Default=7)
L(2)
L(1)
L(0)
DIVIDE BY
0
0
0
31-pos, 0-neg
0
0
1
4 pos edge
0
1
0
4 neg edge
0
1
1
51-neg, 0-pos
1
0
0
6 pos edge
1
0
1
8 neg edge
1
1
0
8 neg edge
1
1
1
10 neg edge
7
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