FW82801DB S L66K Intel, FW82801DB S L66K Datasheet - Page 65

• Manufacturer Part Number: FW82801DB S L66K
• Manufacturer: Intel

Specifications of FW82801DB S L66K

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Intel
Intel
®
Table 4-1. Intel
82801DB ICH4 Datasheet
®
Table 4-1
various system components, including the clock generator in both desktop and mobile systems. For
complete details of the system clocking solution refer to the system’s clock generator component
specification.
ICH4 and System Clock Domains
AC_BIT_CLK
System PCI
LAN_CLK
APICCLK
Domain
PCICLK
CLK66
CLK48
CLK14
Clock
ICH4
ICH4
ICH4
ICH4
ICH4
ICH4
®
ICH4 and System Clock Domains
shows the system clock domains.
14.31818 MHz
12.288 MHz
5 to 50 MHz
Frequency
66 MHz
33 MHz
33 MHz
48 MHz
33 MHz
AC ’97 Codec
LAN Connect
Component
Main Clock
Main Clock
Main Clock
Main Clock
Main Clock
Main Clock
Generator
Generator
Generator
Generator
Generator
Generator
Source
Figure 4-1
Hub I/F, processor I/F. AGP. Shut off during S3 or below.
Free-running PCI Clock to ICH4. This clock remains on
during S0 and S1 state, and is expected to be shut off
during S3 or below .
PCI Bus, LPC I/F. These only go to external PCI and LPC
devices.
Super I/O, USB controllers. Expected to be shut off during
S3 or below
Used for ACPI timer. Expected to be shut off during S3 or
below
AC-link. Generated by AC ’97 Codec. Can be shut by
codec in D3. Expected to be shut off during S3 or below
Used for ICH4-CPU interrupt messages. Runs up to
33 MHz. Expected to be shut off during S3 or below
Generated by the LAN Connect component. Expected to
be shut off during S3 or below
Intel
shows the assumed connection of the
®
ICH4 and System Clock Domains
Usage
4
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