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参数资料
型号： BX80532KC3000D
厂商： INTEL CORP
元件分类： 微控制器/微处理器
英文描述： 3000 MHz, MICROPROCESSOR
文件页数： 76/129页
文件大小： 1640K
代理商： BX80532KC3000D
Intel Xeon Processor with 512 KB L2 Cache
50
Datasheet
3.3
Front Side 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 or below V
SS. The
overshoot/undershoot specifications limit transitions beyond VCC or VSS due to the fast signal edge
rates. The processor can be damaged by single and/or 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’s signal integrity models do
not clamp undershoot or overshoot and will yield correct simulation results. If other signal integrity
models are being used to characterize the processor front side bus, care must be taken to ensure that
ESD models do not clamp extreme voltage levels. Intel’s signal integrity models also contain I/O
capacitance characterization. Therefore, removing the ESD diodes from a signal integrity 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 (V
SS). 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
in Table 24 through Table 27. These specifications must not be violated at any time regardless of
bus activity or system state. Within these specifications are threshold levels that define different
allowed pulse duration. 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 if 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 (VCC). The total time could encompass several oscillations above the
reference voltage. Multiple overshoot/undershoot pulses within a single overshoot/undershoot
event may need to be measured to determine the total pulse duration.
Note 1: Oscillations below the reference voltage can not be subtracted from the total overshoot/
undershoot pulse duration.
相关PDF资料
PDF描述
BU-65843F3-110 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP80
BP83C51FA-1 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PDIP40
BU-61559D1-240S 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQIP78
BU-61559D1-240 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQIP78
BU-61559D1-290K 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQIP78
相关代理商/技术参数
参数描述
BX80532KC3000H 制造商:Intel 功能描述:MPU XEON NETBURST 64-BIT 0.13UM 3GHZ - Boxed Product (Development Kits)
BX80532KE2000D 制造商:Intel 功能描述:MPU XEON PROCESSOR NETBURST 64-BIT 0.13UM 2GHZ - Boxed Product (Development Kits)
BX80532KE2000DU 制造商:Intel 功能描述:XEON 2.0GHZ 533FSB 1U - Boxed Product (Development Kits)
BX80532KE2400DSL73L 制造商:Intel 功能描述:
BX80532KE2400E 制造商:Intel 功能描述:MPU XEON PROCESSOR NETBURST 64-BIT 0.13UM 2.4GHZ - Boxed Product (Development Kits)
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