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參數(shù)資料
| 型號： | MB15F88ULPFT |
| 廠商： | FUJITSU LTD |
| 元件分類： | XO, clock |
| 英文描述： | Fractional-N PLL Frequency Synthesizer |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 2600 MHz, PDSO20 |
| 封裝： | PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 9/29頁 |
| 文件大?。?/td> | 175K |
| 代理商： | MB15F88ULPFT |
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MB15F88UL
9
(2) Data Setting
RX synthesizer Data Setting (Fractional-N)
The divide ratio can be calculated using the following equation :
f
VCORX
=
N
TOTAL
×
fosc
÷
R
N
TOTAL
=
P
×
N
+
A
+
F
/
Q (A
<
N
2, F
<
Q)
Binary 14
-
bit Programmable Reference Counter Data Setting
(R
F
1 to R
F
14)
Divide ratio
(R)
8
0
0
0
0
9
0
0
0
0
52
0
0
0
0
16383
1
1
1
1
Note : Divide ratio less than 8 is prohibited.
Fractional-N incremant of the fractional accumulator Data Setting
(
F1
to
F4
)
Setting value(F)
F4
0
0
1
0
2
0
15
1
Note : F
<
Q, F5
=
0
Fractional-N modulo Data Setting
(
Q
)
QM
0
1
R
F
14 R
F
13 R
F
12 R
F
11 R
F
10
R
F
9
R
F
8
R
F
7
R
F
6
R
F
5
R
F
4
R
F
3
R
F
2
R
F
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
1
1
0
0
1
1
1
1
0
1
0
0
1
1
0
0
0
1
0
1
0
1
F3
0
0
0
1
F2
0
0
1
1
F1
0
1
0
1
Modulo-Q
5
8
f
VCORX
N
TOTAL
fosc
R
P
N
A
F
Q
: Output frequency of external voltage controlled oscillator (VCO)
: Total division ratio from prescaler input to the phase detector input
: Output frequency of the reference frequency oscillator
: Preset divide ratio of binary 14 bit referance counter (8 to 16383)
: Preset divide ratio of modulus prescaler (32 fixed)
: Preset divide ratio of binary 10 bit programmable counter (34 to 1023)
: Preset divide ratio of binary 5 bit swallow counter (0 to 31)
: A numerator of fractional-N (0 to 15)
: A denominator of fractional-N “QM bit
=
1” modulo 8, “QM bit
=
0” modulo 5
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