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| 型号： | ICS950218YFLF-T |
| 英文描述： | Programmable Timing Control Hub TM for P4 TM |
| 中文描述： | 可编程定时控制中心，为小四至商标商标 |
| 文件页数： | 17/19页 |
| 文件大小： | 143K |
| 代理商： | ICS950218YFLF-T |
17
Integrated
Circuit
Systems, Inc.
ICS950218
0466B—03/17/04
Fig. 1
Shared Pin Operation -
Input/Output Pins
The I/O pins designated by (input/output) serve as dual
signal functions to the device. During initial power-up, they
act as input pins. The logic level (voltage) that is present on
these pins at this time is read and stored into a 5-bit internal
data latch. At the end of Power-On reset, (see AC
characteristics for timing values), the device changes the
mode of operations for these pins to an output function. In
this mode the pins produce the specified buffered clocks to
external loads.
To program (load) the internal configuration register for
these pins, a resistor is connected to either the VDD (logic 1)
power supply or the GND (logic 0) voltage potential. A 10
Kilohm (10K) resistor is used to provide both the solid CMOS
programming voltage needed during the power-up
programming period and to provide an insignificant load on
the output clock during the subsequent operating period.
Via to
VDD
Clock trace to load
Series Term. Res.
Programming
Header
Via to Gnd
Device
Pad
2K
8.2K
Figure 1 shows a means of implementing this function
when a switch or 2 pin header is used. With no jumper is
installed the pin will be pulled high. With the jumper in
place the pin will be pulled low. If programmability is not
necessary, than only a single resistor is necessary. The
programming resistors should be located close to the series
termination resistor to minimize the current loop area. It is
more important to locate the series termination resistor
close to the driver than the programming resistor.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS950220 | 制造商:ICS 制造商全称:ICS 功能描述:Programmable Timing Control Hub⑩ for P4⑩ |
| ICS950220AFLF | 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 |
| ICS950220AFLFT | 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 |
| ICS950220YFLFT | 制造商:ICS 制造商全称:ICS 功能描述:Programmable Timing Control Hub⑩ for P4⑩ |
| ICS950220YFLF-T | 制造商:ICS 制造商全称:ICS 功能描述:Programmable Timing Control Hub⑩ for P4⑩ |
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