CPC309 Intel Atom D510-based SBC
Specification
5 Configuration of CPC309
5.1 Selection of Buffers Power Voltage on the PCI Bus of Extension
Modules
Before installing extension modules (StackPC-PCI, PCI-104, PCI/104-Express), one must select
the PCI buffers power voltage with the help of XP13 switch (PCI VIO Selector).
Attention!
All operations are to be performed with the module power off.
The XP13 switch is located on the top side of the board, near the XS4 connector, see Fig. 3 2:
Location of connectors and principal components on the TOP side (pay attention to the note at
the end of that subsection).
Fig. 5-1: Status of the PCI VIO Selector (XP13) Switch Contacts
Contacts 1-2 closed
– PCI bus signal levels: +5 V
Contacts 2-3 closed
– PCI bus signal levels: +3.3 V
All contacts open - signal levels are selected at the PC-104 power
source
Attention!
If you use a PC-104 power source, the VIO voltage must be set at the power source module. In
this case you should remove the jumper from the VIO (XP13) selector switch:
all contacts are
open
.
If the PC-104 power source is not used, the jumper on the XP13 selector switch must be set into
the 1-2 or 2-3 position.
