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| 型号： | RK80532RC056128 |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 2400 MHz, MICROPROCESSOR, CPGA478 |
| 封装： | FLIP CHIP, PGA2-478 |
| 文件页数： | 40/99页 |
| 文件大小： | 4142K |
| 代理商： | RK80532RC056128 |
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Datasheet
45
System Bus Signal Quality Specifications
3.3
System Bus Signal Quality Specifications and
Measurement Guidelines
3.3.1
Overshoot/Undershoot Guidelines
Overshoot (or undershoot) is the absolute value of the maximum voltage above the nominal high
voltage (or below VSS) as shown in Figure 26. The overshoot guideline limits transitions beyond
VCC or VSS because of the fast signal edge rates. The processor can be damaged by repeated
overshoot or undershoot events on any input, output, or I/O buffer if the charge is large enough
(i.e., if the over/undershoot is great enough). Determining the impact of an overshoot/undershoot
condition requires knowledge of the magnitude, the pulse direction, and the activity factor (AF).
Permanent damage to the processor is the likely result of excessive overshoot/undershoot.
When performing simulations to determine impact of overshoot and undershoot, ESD diodes must
be properly characterized. ESD protection diodes do not act as voltage clamps and will not provide
overshoot or undershoot protection. ESD diodes modeled within Intel I/O buffer models do not
clamp undershoot or overshoot, and will yield correct simulation results. If other I/O buffer models
are being used to characterize the Celeron processor on 0.13 micron process system bus, care must
be taken to ensure that ESD models do not clamp extreme voltage levels. Intel I/O buffer models
also contain I/O capacitance characterization. Therefore, removing the ESD diodes from an I/O
buffer model will impact results and may yield excessive overshoot/undershoot.
3.3.2
Overshoot/Undershoot Magnitude
Magnitude describes the maximum potential difference between a signal and its voltage reference
level. For the Celeron processor on 0.13 micron process, both are referenced to VSS. It is important
to note that overshoot and undershoot conditions are separate, and their impact must be determined
independently.
Overshoot/undershoot magnitude levels must observe the absolute maximum specifications listed
bus activity or system state. Within these specifications are threshold levels that define different
allowed pulse durations. Provided that the magnitude of the overshoot/undershoot is within the
absolute maximum specifications, the pulse magnitude, duration and activity factor must all be
used to determine whether the overshoot/undershoot pulse is within specifications.
3.3.3
Overshoot/Undershoot Pulse Duration
Pulse duration describes the total time an overshoot/undershoot event exceeds the overshoot/
undershoot reference voltage (maximum overshoot = 1.800 V, maximum undershoot = -0.335 V).
The total time could encompass several oscillations above the reference voltage. Multiple
overshoot/undershoot pulses within a single overshoot/undershoot event may have to be measured
to determine the total pulse duration.
Note:
Oscillations below the reference voltage can not be subtracted from the total overshoot/undershoot
pulse duration.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| RK80532RC060128S L6ZY | 制造商:Intel 功能描述:MPU Celeron? Processor 0.13um 2.5GHz 478-Pin FCPGA2 制造商:Intel 功能描述:NORTHWOOD; MPU CELERON 0.13UM 2.5GHZ 478PIN FCPGA2 - Trays |
| RK80532RC060128SL72B | 功能描述:IC CELERON 2.5GHZ 478FC-PGA2 RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微处理器 系列:- 标准包装:2 系列:MPC8xx 处理器类型:32-位 MPC8xx PowerQUICC 特点:- 速度:133MHz 电压:3.3V 安装类型:表面贴装 封装/外壳:357-BBGA 供应商设备封装:357-PBGA（25x25） 包装:托盘 |
| RK80532RC064128 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| RK805346RE067256 | 制造商:Intel 功能描述:TRAY CELERON D 330 - Trays |
| RK80546KF0871M | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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