Intel B80532PG0962M Datasheet download pdf (Page 18)

18 Intel

Pentium

4 Processor on 0.13 Micron Process Datasheet

Electrical Specifications

2.4.1 Phase Lock Loop (PLL) Power and Filter

CCA

and V

CCIOPLL

are power sources required by the PLL clock generators on the Pentium 4

processor on 0.13 micron process. Since these PLLs are analog, 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 V

. A typical filter topology is shown in Figure 2-2.

The AC low-pass requirements, with input at V

and output measured across the capacitor

or C

in Figure 2-2), 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

Refer to the appropriate platform design guide for recommendations on implementing the filter.

Table 2-2. Voltage Identification Definition

Processor Pins

CC_MAX

VID4 VID3 VID2 VID1 VID0

11111VRM output off

111101.100

111011.125

111001.150

110111.175

110101.200

110011.225

110001.250

101111.275

101101.300

101011.325

101001.350

100111.375

100101.400

100011.425

100001.450

011111.475

011101.500

011011.525

011001.550

010111.575

010101.600

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 84 85

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Intel B80532PG0962M Datasheet Page 18

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