82801DB Datasheet, PDF (66/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

Intel^® ICH4 and System Clock Domains
Figure 4-1. Conceptual System Clock Diagram
Intel^®
ICH4
66 MHz
33 MHz
APIC CLK
14.31818 MHz
48 MHz
Clock
Gen.
PCI Clocks
(33 MHz)
14.31818 MHz
48 MHz
32 kHz
XTAL
12.288 MHz
50 MHz
AC ’97 Codec(s)
LAN Connect
SUSCLK# (32 kHz)
66
Intel^® 82801DB ICH4 Datasheet