Figure 7: PCIe x1 slot reference schematic
2.2.2.2 Mini PCIe Card Schematic Example
The Mini PCIe Card (also called PCI Express Mini Card, Mini PCI Express or Mini PCIe) also features
a USB 2.0 high-speed interface. In order to be compliant, the carrier board needs to provide both
interfaces, the PCIe and USB. As most of the Mini PCIe Cards use only one of its interfaces for an
embedded carrier board which is developed for a restricted set of compatible cards, it might be
sufficient to implement only the required interface. Check with the Mini PCIe Card vendor whether
the USB, PCIe or both interfaces are used by the card.
The Mini PCIe Card features the decoupling capacitors for the RX lines on the card. Therefore, no
additional decoupling capacitors should to be placed on the carrier board in either the RX, TX or
reference clock lines.
Figure 8: Mini PCIe Card Block Diagram
The Apalis module standard does not feature a dedicated PCIe reset output as it does not provide
the PCIe hot-plug functionality. Therefore, the PCIe reset input (PERST#, pin 22) of the card should
be served by the general module reset output (RESET_MOCI#). Some Apalis modules might
provide the additional hot-plug signals such as reset and hot-plug detect as secondary functions or
as type-specific interfaces. Nevertheless, as compatibility between different Apalis modules could
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