- 您现在的位置：买卖IC网 > PDF目录1999 > ICS94201DFLF (IDT, Integrated Device Technology Inc)IC FREQ GENERATOR PROGR 56-SSOP PDF资料下载
参数资料
| 型号： | ICS94201DFLF |
| 厂商： | IDT, Integrated Device Technology Inc |
| 文件页数： | 18/19页 |
| 文件大小： | 0K |
| 描述： | IC FREQ GENERATOR PROGR 56-SSOP |
| 标准包装： | 26 |
| 类型： | 时钟/频率发生器，多路复用器 |
| PLL： | 是 |
| 主要目的： | Intel CPU 服务器 |
| 输入： | 晶体 |
| 输出： | 时钟 |
| 电路数： | 1 |
| 比率 - 输入:输出： | 2:29 |
| 差分 - 输入:输出： | 无/无 |
| 频率 - 最大： | 500.03MHz |
| 电源电压： | 3.135 V ~ 3.465 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 56-BSSOP（0.295"，7.50mm 宽） |
| 供应商设备封装： | 56-SSOP |
| 包装： | 管件 |
| 其它名称： | 94201DFLF |
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
相关PDF资料 |
PDF描述 |
|---|---|
| ICS950218AF | IC TIMING CTRL HUB P4 48-SSOP |
| ICS950908BFLF | IC TIMING CTRL HUB P4 56-SSOP |
| ICS951402AGLF | IC TIMING CTRL HUB P4 48-TSSOP |
| ICS95V847AGIT | IC CLOCK DRIVER 2.5V 24-TSSOP |
| ICS95V850AGT | IC CLK DVR PLL 1:10 48TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS94201DFLFT | 功能描述:IC FREQ GENERATOR PROGR 56-SSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:- 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ICS94201DFT | 功能描述:IC FREQ GENERATOR PROGR 56-SSOP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:- 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ICS94201YFT | 制造商:ICS 制造商全称:ICS 功能描述:Programmable System Frequency Generator for PII/III⑩ |
| ICS94203 | 制造商:ICS 制造商全称:ICS 功能描述:Programmable System Frequency Generator for PII/III⑩ |
| ICS94203F-T | 制造商:ICS 制造商全称:ICS 功能描述:Peripheral IC |
发布紧急采购，3分钟左右您将得到回复。