Platform System Clock-Reference - Intel Xeon Design Manual

Platform Clock Routing Guidelines
Table 4-2. Platform System Clock-Reference
Clock Group
Host_CLK
CLK66
CLK33_ICH3-S
CLK14
CLK33
USBCLK
36
CK-408B Pin Component
CPU# Debug Port
CPU Debug Port
CPU# Processor 0
CPU Processor 0
CPU# Processor 1
CPU Processor 1
CPU# MCH
CPU MCH
66BUF MCH
ICH3-S
P64H2
PCIF ICH3-S
REF0 ICH3-S
SIO
PCI PCI Connector #1
PCI Connector #2
PCI Connector #3
PCI Connector #4
PCI Connector #5
FWH
SIO
PCIF BMC
USB-48MHZ ICH3-S
Component Pin Name
BCLK[0]
BCLK[1]
BCLK[0]
BCLK[1]
BCLK[0]
BCLK[1]
HCLKINP
HCLKINN
66IN
CLK66
CLK66
PCICLK
CLK14
CLOCKl
CLK
CLK
CLK
CLK
CLK
CLK
PCI_CLK
LCLK
CLK48
Design Guide