Mobile Intel Pentium 4 Processor - M and Intel 845MP/MZ Chipset Platform Design Guide

Mobile Intel

Pentium

4 Processor-M and Intel

845MP/845MZ Chipset Platform

142 Design Guide

10. Platform Clock Routing Guidelines

10.1. Clock Generation

Only one clock generator component is required in an Intel 845MP/845MZ chipset-based system. Clock

synthesizers that meet the Intel CK-408 Clock Synthesizer/Driver Specification are suitable for an Intel

845MP/845MZ chipset based system. For more information on CK-408 compliance, refer to the CK-408

Clock Synthesizer/Driver Specification Document. The following tables and figure list and detail the

Intel 845MP/845MZ clock groups, the platform system clock cross-reference, and the platform clock

distribution:

Table 47. Intel 845MP/845MZ Clock Groups

Clock Name Frequency Receiver

Host_CLK 100 MHz CPU, Debug Port, and MCH-M

CLK66 66 MHz MCH-M and Intel ICH3-M

AGPCLK 66 MHz AGP Connector or AGP Device

CLK33 33 MHz Intel ICH3-M, SIO, Glue Chip, and FWH

CLK14 14.318 MHz Intel ICH3-M and SIO

PCICLK 33 MHz PCI Connector

USBCLK 48 MHz Intel ICH3-M

APIC_CLK 33 MHz Intel ICH3-M (not used on 845MP/845MZ

platform)