876784 Intel, 876784 Datasheet - Page 95

• Manufacturer Part Number: 876784
• Manufacturer: Intel

Specifications of 876784

• Lead Free Status / RoHS Status: Compliant

Intel
4
Table 4-1.
Intel
®
®
ICH7 and System Clock Domains
ICH7 Family Datasheet
Intel
Domains
Table 4-1
assumed connection of the various system components, including the clock generator
in desktop and mobile/ultra mobile systems. For complete details of the system
clocking solution, refer to the system’s clock generator component specification.
Intel
Clock Domain
ACZ_BIT_CLK
(Desktop and
(Desktop and
(Desktop and
(Desktop and
Mobile Only)
Mobile only)
Mobile only)
Mobile only)
Intel
SATA_CLKP,
SATA_CLKN
System PCI
DMI_CLKP,
DMI_CLKN
LAN_CLK
SPI_CLK
PCICLK
CLK48
CLK14
®
ICH7
ICH7
ICH7
ICH7
ICH7
®
ICH7 and System Clock Domains
ICH7
shows the system clock domains.
®
48.000 MHz
12.288 MHz
5 to 50 MHz
Frequency
17.86 MHz
14.31818
100 MHz
100 MHz
ICH7 and System Clock
33 MHz
33 MHz
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
ICH
Figure 4-1
Differential clock pair used for SATA.
Differential clock pair used for DMI.
Free-running PCI Clock to ICH7. This clock
remains on during S0 and S1 (in desktop) state,
and is expected to be shut off during S3 or
below in desktop configurations or S1 or below
in mobile/ultra mobile configurations.
PCI Bus, LPC I/F. These only go to external PCI
and LPC devices. Will stop based on CLKRUN#
(and STP_PCI#) in mobile/ultra mobile
configurations.
Super I/O, USB controllers. Expected to be shut
off during S3 or below in desktop configurations
or S1 or below in mobile/ultra mobile
configurations.
Used for ACPI timer and Multimedia Timers.
Expected to be shut off during S3 or below in
desktop configurations or S1 or below in mobile/
ultra mobile configurations.
AC-link. Generated by AC ’97 Codec. Can be
shut by codec in D3. Expected to be shut off
during S3 or below in desktop configurations or
S1 or below in mobile configurations.
NOTE: For use only in AC ‘97 mode.
Generated by the LAN Connect component.
Expected to be shut off during S3 or below in
desktop configurations or S1 or below in mobile
configurations.
Generated by the LAN Connect component.
Expected to be shut off during S3 or below in
desktop configurations or S1 or below in mobile
configurations.
and
Figure 4-2
Usage
show the
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