参数资料
型号: RK80532RC056128
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 2400 MHz, MICROPROCESSOR, CPGA478
封装: FLIP CHIP, PGA2-478
文件页数: 8/99页
文件大小: 4142K
代理商: RK80532RC056128
16
Datasheet
Electrical Specifications
2.4.1
Phase Lock Loop (PLL) Power and Filter
VCCA and VCCIOPLL are power sources required by the PLL clock generators on the Celeron
processor on 0.13 micron process. 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 2.
The AC low-pass requirements, with input at VCC and output measured across the capacitor (CA
or CIO in Figure 2), is 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 3. For recommendations on implementing the filter,
refer to the appropriate Platform Design Guide listed in Table 1.
Table 3.
Voltage Identification Definition
Processor Pins
VCC_MAX
VID4
VID3
VID2
VID1
VID0
1
VRM output off
1
0
1.100
1
0
1
1.125
1
0
1.150
1
0
1
1.175
1
0
1
0
1.200
1
0
1
1.225
1
0
1.250
1
0
1
1.275
1
0
1
0
1.300
1
0
1
0
1
1.325
1
0
1
0
1.350
1
0
1
1.375
1
0
1
0
1.400
1
0
1
1.425
1
0
1.450
0
1
1.475
0
1
0
1.500
0
1
0
1
1.525
0
1
0
1.550
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