参数资料
型号: RK80532EC056512
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 2400 MHz, MICROPROCESSOR, CPGA604
封装: FLIP CHIP, MICRO PGA-604
文件页数: 14/102页
文件大小: 2349K
代理商: RK80532EC056512
Low Voltage Intel Xeon Processor at 1.60 GHz, 2.0 GHz and 2.4 GHz
Datasheet
19
2.7
Reserved Or Unused Pins
All Reserved pins must remain unconnected on the system baseboard. Connection of these pins to
VCC, VSS, or to any other signal (including one another) may result in component malfunction or
incompatibility with future processors. See Chapter 5.0 for a pin listing of the processor and for the
location of all Reserved pins.
For reliable operation, unused inputs or bidirectional signals should always be connected to an
appropriate signal level. In a system-level design, on-die termination has been included on the
processor to allow signal termination to be accomplished by the processor silicon. Most unused
AGTL+ inputs should be left as no connects, as AGTL+ termination is provided on the processor
silicon. However, see Table 5 for details on AGTL+ signals that do not include on-die termination.
Unused active high inputs should be connected through a resistor to ground (VSS). Unused outputs
may be left unconnected, however this may interfere with some TAP functions, complicate debug
probing, and prevent boundary scan testing. A resistor must be used when tying bidirectional
signals to power or ground. When tying any signal to power or ground, a resistor may also allow
for system testability. For unused AGTL+ input or I/O signals, use pull-up resistors of the same
value for the on-die termination resistors (R
TT). See Table 12.
TAP, Asynchronous GTL+ inputs, and Asynchronous GTL+ outputs do not include on-die
termination. Inputs and all used outputs must be terminated on the baseboard. Unused outputs may
be terminated on the baseboard or left unconnected. Note that leaving unused outputs unterminated
may interfere with some TAP functions, complicate debug probing, and prevent boundary scan
testing. Signal termination for these signal types is discussed in the ITP700 Debug Port Design
Guide.
All TESTHI[6:0] pins should be individually connected to V
CC through a pull-up resistor which
matches the trace impedance within
±10
. TESTHI[3:0] and TESTHI[6:5] may all be tied
together and pulled up to VCC with a single resistor when desired. However, utilization of the
boundary scan test may not be functional when these pins are connected together. TESTHI4 must
always be pulled up independently from the other TESTHI pins. For optimum noise margin, all
pull-up resistor values used for TESTHI[6:0] pins should have a resistance value within 20 percent
of the impedance of the baseboard transmission line traces. For example, when the trace impedance
is 50 W, then a pull-up resistor value between 40 and 60 W should be used. The TESTHI[6:0]
termination recommendations provided in the Low Voltage Intel
Xeon Processor Datasheet are
also suitable for the Intel
Xeon processor. However, Intel recommends new designs or designs
undergoing design updates follow the trace impedance matching termination guidelines outlined in
this section.
2.8
System Bus Signal Groups
In order to simplify the following discussion, the system bus signals have been combined into
groups by buffer type. AGTL+ input signals have differential input buffers, which use GTLREF as
a reference level. In this document, the term “AGTL+ Input” refers to the AGTL+ input group as
well as the AGTL+ I/O group when receiving. Similarly, “AGTL+ Output” refers to the AGTL+
output group as well as the AGTL+ I/O group when driving.
With the implementation of a source synchronous data bus comes the need to specify two sets of
timing parameters. One set is for common clock signals whose timings are specified with respect to
rising edge of BCLK0 (ADS#, HIT#, HITM#, etc.) and the second set is for the source
synchronous signals which are relative to their respective strobe lines (data and address) as well as
相关PDF资料
PDF描述
RK80532KE056512 32-BIT, 2400 MHz, MICROPROCESSOR, CPGA604
BX80532KE3060D 3060 MHz, MICROPROCESSOR, XMA
BX80532KE2400DU 2400 MHz, MICROPROCESSOR, XMA604
RK80532PG072512 2800 MHz, MICROPROCESSOR, PGA478
RK80532RC049128 32-BIT, 2100 MHz, MICROPROCESSOR, CPGA478
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