参数资料
型号: RK80546KG0802MM
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 64-BIT, 3000 MHz, MICROPROCESSOR, CPGA604
封装: FLIP CHIP, MICRO PGA-604
文件页数: 18/106页
文件大小: 4724K
代理商: RK80546KG0802MM
Datasheet
19
Electrical Specifications
determined by the processor(s), chipset, and clock synthesizer. All front side bus agents must
operate at the same core and front side bus frequencies. Individual processors will only operate at
their specified front side bus clock frequency.
2.3.2
Phase Lock Loop (PLL) and Filter
V
CCA and VCCIOPLL are power sources required by the PLL clock generators on the processor. Since
these PLLs are analog in nature, they require quiet 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 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 2-1.
Table 2-2. BSEL[1:0] Frequency Table
BSEL1
BSEL0
Bus Clock Frequency
00
Reserved
01
Reserved
1
0
200 MHz
11
Reserved
Figure 2-1. Phase Lock Loop (PLL) Filter Requirements
0 dB
-28 dB
-34 dB
0.2 dB
forbidden
zone
-0.5 dB
forbidden
zone
1 MHz
66 MHz
fcore
fpeak
1 Hz
DC
passband
high frequency
band
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