Kontron COMe Starterkit Eval T2 - Manual (Page 41)

COM Express Interfaces
PCI Express Mini Cards are popular for implementing features such as wireless LAN. A small
footprint connector can be implemented on the Carrier Board providing the ability to insert
different removable PCI Express Mini Cards. Using this approach gives the flexibility to mount
an upgradeable, standardized PCI Express Mini Card device to the Carrier Board without
additional expenditure of a redesign.
A PCI Express Mini Card interface includes a single x1 PCIe link and a single USB 2.0 channel.
The mini PCI Express Card host should offer both interfaces. The PCI Express Mini Card
installed into the socket may use either interface.
The source specification for mini-PCI Express Cards is the PCI Express Mini Card
Electromechanical Specification.
Two different card sizes of PCI Express Mini Card are allowed: a full sized card with 30.00 mm x
50.95 mm and a half sized card with 30.00 mm x 26.80 mm.
Figure 11: PCI Express Mini Full Sized Card Footprint
Figure 12: PCI Express Mini Card Connector
A typical PCI Express Mini-Card socket is shown in Figure 12 above.
The pins used on a PCI Express Mini-Card socket are listed in Table 7: PCIe Mini Card
Connector Pin-out below.
PICMG ® COM Express ® Carrier Board Design Guide Rev. 2.0 / December 6, 2013
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30
.0
0
24
.2
0
8.
25
50
.9
5
48
.0
5
edi
S
po
T
1.
65
P
in
1
P
in
5
1