参数资料
型号: RH80532GC025512
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 1600 MHz, MICROPROCESSOR, CPGA478
封装: MICRO, FCPGA-478
文件页数: 9/98页
文件大小: 4927K
代理商: RH80532GC025512
Electrical Specifications
Mobile Intel Pentium 4 Processor-M Datasheet
17
processor to the Battery Optimized mode. INIT# assertions ("soft" resets) and APIC bus INIT
messages do not change the operating mode of the processor. Some electrical and thermal
specifications are for a specific voltage and frequency. The Mobile Intel Pentium 4 Processor-M
featuring Enhanced Intel SpeedStep technology will meet the electrical and thermal specifications
specific to the current operating mode, and it is not guaranteed to meet the electrical and thermal
specifications specific to the opposite operating mode. The timing specifications must be met when
performing an operating mode transition.
2.4.2
Phase Lock Loop (PLL) Power and Filter
VCCA and VCCIOPLL are power sources required by the PLL clock generators on the Mobile Intel
Pentium 4 Processor-M silicon. 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 VCCVID. A typical filter topology is shown in Figure 2.
The AC low-pass requirements, with input at VCCVID 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 Mobile Intel Pentium 4 Processor-M and Intel 845MP/845MZ Chipset Platform
Design Guide.
Figure 2. Typical VCCIOPLL, VCCA and VSSA Power Distribution
V
CCVID
VCCA
VSSA
VCCIOPLL
L
Processor
Core
PLL
CA
CIO
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