参数资料
型号: RN80532KC0412M
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 2000 MHz, MICROPROCESSOR, CPGA603
封装: Interposer, Micro, PGA-603
文件页数: 43/132页
文件大小: 2316K
代理商: RN80532KC0412M
Electrical Specifications
2-4
Intel Xeon Processor MP with up to 2MB L3 Cache
2.5
PLL Filter
V
CCA and VCCIOPLL are power sources required by the PLL clock generators on the Intel Xeon
processor MP on the 0.13 micron process processor. This requirement is identical to that used on
the Intel Xeon processors. 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 VCC. A typical filter topology is shown in Figure 1.
The AC low-pass requirements, with input at VCC and output measured across the capacitor (CA or
C
IO in Figure 1), is as follows:
< 0.2 dB gain in pass band
< 0.5 dB attenuation in pass band < 1 Hz (see DC drop in next set of requirements)
> 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. For recommendations on implementing the filter
refer to the appropriate platform design guidelines.
Figure 1. Typical VCCIOPLL, VCCA and VSSA Power Distribution
VCC
VCCA
VSSA
VCCIOPLL
L1/L2
C
Processor
PLL
R-Socket
R-Trace
R-Socket
R-Trace
Processor interposer "pin"
Baseboard via that connects
filter to VCC plane
Trace
< 0.02
Socket pin
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