參數(shù)資料
型號: 80546KF
廠商: Intel Corp.
英文描述: 64-bit Intel Xeon Processor MP with up to 8MB L3 Cache
中文描述: 64位Intel Xeon處理器MP的高達(dá)8MB三級高速緩存
文件頁數(shù): 19/138頁
文件大小: 2666K
代理商: 80546KF
64-bit Intel
Xeon Processor MP with up to 8MB L3 Cache Datasheet
19
Electrical Specifications
2.1.2
Front Side Bus Clock Select (BSEL[1:0])
The BSEL[1:0] signals are used to select the frequency of the processor input clock (BCLK[1:0]).
Table 2-2
defines the possible combinations of the signals and the frequency associated with each
combination. The required frequency is determined by the processor, chipset, and clock
synthesizer. All processors must operate at the same front side bus frequency.
The processor operates at a 667 MHz front side bus frequency (selected by a 166 MHz BCLK[1:0]
frequency). Individual processors operate at the front side bus frequency specified by BSEL[1:0].
For more information about these pins, refer to
Section 6.1
.
2.1.3
Phase Lock Loop (PLL) Power and Filter
V
CCA
, V
CCIOPLL
, and V
CCA_CACHE
are power sources required by the PLL clock generators on
the processor. These are analog PLLs and they require low noise power supplies for minimum
jitter. These supplies must be low pass filtered from V
TT
.
The AC low-pass requirements, with input at V
TT
, are as follows:
< 0.2 dB gain in pass band
< 0.5 dB attenuation in pass band < 1 Hz
> 34 dB attenuation from 1 MHz to 66 MHz
> 28 dB attenuation from 66 MHz to core frequency
The filter requirements are illustrated in
Figure 2-2
.
Table 2-2. BSEL[1:0] Frequency Table for BCLK[1:0]
BSEL1
BSEL0
Function
0
0
1
1
0
1
0
1
RESERVED
RESERVED
RESERVED
166 MHz
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