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参数资料
| 型号： | ICS951901YF-T |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 133.34 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封装： | 0.300 INCH, MO-118, SSOP-48 |
| 文件页数： | 17/19页 |
| 文件大小： | 274K |
| 代理商： | ICS951901YF-T |
7
ICS951901
Third party brands and names are the property of their respective owners.
Byte 17: Output Rise/Fall Time Select Register
Byte 18: Output Rise/Fall Time Select Register
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Byte 19: Output Rise/Fall Time Select Register
Byte 20: Output Rise/Fall Time Select Register
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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
UsefulFormula
VCO Frequency = 14.31818 x VCO/REF divider value
Phase Detector Stabiliy = 14.038 x (VCO divider value)-0.5
To program theVCO frequency forover-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 desire 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 8 for readback of 21 bytes (byte 0-20).
3. Read back byte 11-20 and copy values in these registers.
4. Re-initialize the write sequence.
5. Write a '1' to byte 9 bit 7 and write to byte 11 & 12 with the desired VCO & REF divider values.
6. Write to byte 13 to 20 with the values you copy from step 3. This maintains the output spread, skew and slew rate.
7. The above procedure is only needed when changing the VCO for the 1st pass. If VCO frequency needed to be changed
again, user only needs to write to byte 11 and 12 unless the system is to reboot.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS951AI147L | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:LOW SKEW, 1-TO-9 DIFFERENTIAL-TOLVCMOS ZERO DELAY BUFFER |
| ICS952001 | 制造商:ICS 制造商全称:ICS 功能描述:Preliminary Product Previes |
| ICS952001AF | 功能描述:IC TIMING CTRL HUB P4 48-SSOP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:TCH™ 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 |
| ICS952001AFLF | 功能描述:IC TIMING CTRL HUB P4 48-SSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:TCH™ 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 |
| ICS952001AFLFT | 功能描述:IC TIMING CTRL HUB P4 48-SSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:TCH™ 标准包装:28 系列:- 类型:时钟/频率发生器 PLL:是 主要目的:Intel CPU 服务器 输入:时钟 输出:LVCMOS 电路数:1 比率 - 输入:输出:3:22 差分 - 输入:输出:无/是 频率 - 最大:400MHz 电源电压:3.135 V ~ 3.465 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:64-TFSOP （0.240"，6.10mm 宽） 供应商设备封装:64-TSSOP 包装:管件 |
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