Hub Interface 2.0 Generation/Distribution Of Reference Voltages; Hub Interface 2.0 Routing Guidelines For Device Down Solutions; Hub Interface 2.0 Routing Guidelines For Hub Interface Connector Solutions - Intel Pentium M Processor Design Manual

Figure 76.

Hub Interface 2.0 Routing Guidelines for Device Down Solutions

Figure 77.

Hub Interface 2.0 Routing Guidelines for Hub Interface Connector Solutions

NOTE: The 14 inch maximum length allows for a single connector and three inch adaptor card trace length.
The PCI connector is an equivalent three inch electrical length. The maximum motherboard trace
length must be shortened when an additional trace is allocated for the trace of a riser card, making
sure to also subtract the additional equivalent trace of a second connector.
7.2.2 Hub Interface 2.0 Generation/Distribution of Reference
Voltages
The nominal Hub Interface 2.0 reference voltage is 0.350 V ± 5%. Each Hub Interface 2.0 on the
MCH has a dedicated HIVREF pin to sample this reference voltage. Similarly, the Intel
has a dedicated reference voltage pin. In addition to the reference voltage, a reference swing
Design Guide
® ®
Intel Pentium
Intel®
E7501
Chipset
CLK66
Intel®
E7501
Chipset
CLK66
M Processor and Intel
3" - 20"
PSTRBF
PSTRBS
PUSTRBF
PUSTRBS
HI_[21:0]
CLK66
CK408B
3" - 14"
PSTRBF
PSTRBS
PUSTRBF
PUSTRBF
HI_[21:0]
CK408B
®
E7501 Chipset Platform
Hub Interface
®
Intel
P64H2
C
o
n
n
e
c
t
o
CLK66
r
®
P64H2
117