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| 型号： | BX80552651 |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 3400 MHz, MICROPROCESSOR, PBGA775 |
| 封装： | FLIP CHIP, LGA-775 |
| 文件页数： | 36/108页 |
| 文件大小： | 3283K |
| 代理商： | BX80552651 |
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Datasheet
35
Electrical Specifications
2.7.2
FSB Frequency Select Signals (BSEL[2:0])
The BSEL[2:0] signals are used to select the frequency of the processor input clock (BCLK[1:0]).
Table 2-17 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 agents must operate at the same frequency.
The Pentium 4 processor will operate at an 800 MHz FSB frequency (selected by a 200 MHz
BCLK[1:0] frequency).
For more information about these signals, refer to Section 4.2.
2.7.3
Phase Lock Loop (PLL) and Filter
V
CCA and VCCIOPLL are power sources required by the PLL clock generators for the Pentium 4
processor silicon. Since these PLLs are analog, they require low noise power supplies for minimum
jitter. Jitter is detrimental to the system: it degrades external I/O timings as well as internal core
timings (i.e., maximum frequency). To prevent this degradation, these supplies must be low pass
filtered from VTT.
The AC low-pass requirements, with input at VTT 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 2-3. For recommendations on implementing the
filter.
Table 2-17. BSEL[2:0] Frequency Table for BCLK[1:0]
BSEL2
BSEL1
BSEL0
FSB Frequency
L
RESERVED
L
H
RESERVED
L
H
RESERVED
L
H
L
200 MHz
H
L
RESERVED
H
RESERVED
H
L
H
RESERVED
H
L
RESERVED
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BX80552651T2 | 制造商:Intel 功能描述:P4 651 3.4GHZ LP-BTX 2MB - Boxed Product (Development Kits) |
| BX80552651T2 S L94W | 制造商:Intel 功能描述:MPU Pentium 制造商:Intel 功能描述:MPU Pentium? 4 Processor 651 65nm 3.4GHz 775-Pin FCLGA6 |
| BX80552651T2 S L9KE | 制造商:Intel 功能描述:MPU Pentium |
| BX80552661T2 | 制造商:Intel 功能描述:P4 661 3.6GHZ LP-BTX 2MB - Boxed Product (Development Kits) |
| BX80553915 S L9KB | 制造商:Intel 功能描述: |
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