- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄24857 > 94201DF (INTEGRATED DEVICE TECHNOLOGY INC) 200 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO56 PDF資料下載
參數(shù)資料
| 型號： | 94201DF |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 200 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO56 |
| 封裝： | 0.300 INCH, ROHS COMPLIANT, SSOP-56 |
| 文件頁數(shù)： | 20/21頁 |
| 文件大?。?/td> | 222K |
| 代理商： | 94201DF |
8
ICS94201
0428B - 11/28/05
Byte 13: ICS Reserved Register
Byte 15: VCO Frequency Control Register
Note: The decimal representation of these 9 bits (Byte 15 bit
[7:0] & Byte 14 bit [7] ) + 8 is equal to the VCO divider value.
For example if VCO divider value of 36 is desired, user need
to program 36 - 8 = 28, namely, 0, 00011100 into byte 15 bit
& byte 14 bit 7.
Note: DON'T write a '1' into this register, it will
cause malfunction.
Byte 14: VCO Frequency Control Register
Note: The decimal representation of these 7 bits (Byte 14
[6:0]) + 2 is equal to the REF divider value .
To program the VCO frequency for over-clocking.
0. Before trying to program our clock manually, consider using ICS provided software utilities for easy programming.
1. Select the frequency you want to over-clock from with the desired gear ratio (i.e. CPU:SDRAM:3V66:PCI ratio) by writing to
byte 0, or using initial hardware power up frequency.
2. Write 0001, 1001 (19H) to byte 6 for readback of 25 bytes (byte 0-24).
3. Read back byte 16-24 and copy values in these registers.
4. Re-initialize the write sequence.
5. Write a '1' to byte 8 bit 7 indicating you want to use byte 14 and 15 to control the VCO frequency.
6. Write to byte 14 & 15 with the desired VCO & REF divider values.
7. Write to byte 16 to 24 with the values you copy from step 3. This maintains the output divider mux controls the same gear ratio.
8. The above procedure is only needed when changing the VCO for the 1st pass. If VCO frequency needs to be changed again,
user only needs to write to byte 14 and 15 unless the system is to reboot.
VCO Programming Constrains
VCO Frequency ...................... 150MHz to 500MHz
VCO Divider Range ................ 8 to 519
REF Divider Range ................. 2 to 129
Phase Detector Stability .......... 0.3536 to 1.4142
Useful Formula
VCO Frequency = 14.31818 x VCO/REF divider value
Phase Detector Stabiliy = 14.038 x (VCO divider value)
-0.5
t
i
BD
W
Pn
o
i
t
p
i
r
c
s
e
D
7
t
i
BX
8
t
i
B
r
e
d
i
v
i
D
O
C
V
6
t
i
BX
7
t
i
B
r
e
d
i
v
i
D
O
C
V
5
t
i
BX
6
t
i
B
r
e
d
i
v
i
D
O
C
V
4
t
i
BX
5
t
i
B
r
e
d
i
v
i
D
O
C
V
3
t
i
BX
4
t
i
B
r
e
d
i
v
i
D
O
C
V
2
t
i
BX
3
t
i
B
r
e
d
i
v
i
D
O
C
V
1
t
i
BX
2
t
i
B
r
e
d
i
v
i
D
O
C
V
0
t
i
BX
1
t
i
B
r
e
d
i
v
i
D
O
C
V
t
i
BD
W
Pn
o
i
t
p
i
r
c
s
e
D
7
t
i
B0
)
d
e
v
r
e
s
e
R
(
6
t
i
B0
)
d
e
v
r
e
s
e
R
(
5
t
i
B0
)
d
e
v
r
e
s
e
R
(
4
t
i
B0
t
c
e
l
e
s
e
s
a
b
r
e
m
i
t
0
W
s
m
0
8
5
=
0
s
m
2
=
1
3
t
i
B0
)
d
e
v
r
e
s
e
R
(
2
t
i
B0
)
d
e
v
r
e
s
e
R
(
1
t
i
B0
)
d
e
v
r
e
s
e
R
(
0
t
i
B0
)
d
e
v
r
e
s
e
R
(
t
i
BD
W
Pn
o
i
t
p
i
r
c
s
e
D
7
t
i
BX
0
t
i
B
r
e
d
i
v
i
D
O
C
V
6
t
i
BX
6
t
i
B
r
e
d
i
v
i
D
F
E
R
5
t
i
BX
5
t
i
B
r
e
d
i
v
i
D
F
E
R
4
t
i
BX
4
t
i
B
r
e
d
i
v
i
D
F
E
R
3
t
i
BX
3
t
i
B
r
e
d
i
v
i
D
F
E
R
2
t
i
BX
2
t
i
B
r
e
d
i
v
i
D
F
E
R
1
t
i
BX
1
t
i
B
r
e
d
i
v
i
D
F
E
R
0
t
i
BX
0
t
i
B
r
e
d
i
v
i
D
F
E
R
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 94201DFT | 200 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO56 |
| 08052C103MA74A | General Specifications |
| 94211AFLFT | 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 94211AFT | 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 94211AFLF | 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 94201DF-995LF | 制造商:Integrated Device Technology Inc 功能描述:IDT 94201DF-995LF GENERAL PURPOSE SEMICONDUCTORS - Rail/Tube 制造商:Integrated Device Technology Inc 功能描述:IDT 94201DF-995LF General Purpose Semiconductors |
| 94201DFLF | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| 94201DFLFT | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| 94202 | 功能描述:ION BAR ASSEMBLY 制造商:desco 系列:- 零件狀態(tài):有效 類型:電離器 安裝類型:- 電壓 - 輸入:- 標(biāo)準(zhǔn)包裝:1 |
| 9420-2"X36YD | 功能描述:2 X 36 YD BULK 制造商:3m 系列:* 零件狀態(tài):有效 標(biāo)準(zhǔn)包裝:24 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。