參數(shù)資料
型號(hào)： BX80532KE3066E
廠商： INTEL CORP
元件分類(lèi)： 微控制器/微處理器
英文描述： 3060 MHz, MICROPROCESSOR, XMA
文件頁(yè)數(shù)： 6/102頁(yè)
文件大?。?/td> 1464K
代理商： BX80532KE3066E
Intel Xeon Processor with 533 MHz Front Side Bus at 2 GHz to 3.20 GHz
11
2.0
Electrical Specifications
2.1
Front Side Bus and GTLREF
Most Intel Xeon Processor with 533MHz Front Side Bus signals use Assisted Gunning
Transceiver Logic (AGTL+) signaling technology. This signaling technology provides improved
noise margins and reduced ringing through low voltage swings and controlled edge rates. The
processor termination voltage level is VCC, the operating voltage of the processor core. The use of a
termination voltage that is determined by the processor core allows better voltage scaling on the
processor front side bus. Because of the speed improvements to data and address busses, signal
integrity and platform design methods become more critical than with previous processor families.
Front side bus design guidelines are detailed in the appropriate platform design guide (refer to
Section 1.3).
The AGTL+ inputs require a reference voltage (GTLREF) which is used by the receivers to
determine if a signal is a logical 0 or a logical 1. GTLREF must be generated on the baseboard (See
Table 12 for GTLREF specifications). Termination resistors are provided on the processor silicon
and are terminated to its core voltage (VCC). The on-die termination resistors are a selectable
feature and can be enabled or disabled via the ODTEN pin. For end bus agents, on-die termination
can be enabled to control reflections on the transmission line. For middle bus agents, on-die
termination must be disabled. Intel chipsets will also provide on-die termination, thus eliminating
the need to terminate the bus on the baseboard for most AGTL+ signals. Refer to Section 2.12 for
details on ODTEN resistor termination requirements.
Note: Some AGTL+ signals do not include on-die termination and must be terminated on the baseboard.
See Table 4 for details regarding these signals.
The AGTL+ signals depend on incident wave switching. Therefore timing calculations for AGTL+
signals are based on flight time as opposed to capacitive deratings. Analog signal simulation of the
front side bus, including trace lengths, is highly recommended when designing a system. Please
refer to http://developer.intel.com to obtain the Intel Xeon Processor with 533 MHZ Front Side
Bus Signal Integrity Models.
2.2
Power and Ground Pins
For clean on-chip power distribution, the Intel Xeon processor with 533 MHz Front Side Bus has
190 VCC (power) and 189 VSS (ground) inputs. All VCC pins must be connected to the system power
plane, while all VSS pins must be connected to the system ground plane. The processor VCC pins
must be supplied the voltage determined by the processor VID (Voltage ID) pins.
2.3
Decoupling Guidelines
Due to its large number of transistors and high internal clock speeds, the processor is capable of
generating large average current swings between low and full power states. This may cause
voltages on power planes to sag below their minimum values if bulk decoupling is not adequate.
Larger bulk storage (CBULK), such as electrolytic capacitors, supply current during longer lasting
changes in current demand by the component, such as coming out of an idle condition. Similarly,
they act as a storage well for current when entering an idle condition from a running condition.
相關(guān)PDF資料
PDF描述
BX80532RC2400B 32-BIT, 2400 MHz, MICROPROCESSOR
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