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Multi-Purpose I/O
VL-EPU-4012 Hardware Reference Manual
40
SPX Expansion Bus
Up to two serial peripheral expansion (SPX) devices can be attached to the Owl at connector
using a CBR-0901 cable. The SPX interface provides the standard serial peripheral interface
(SPI) signals: CLK, MISO, and MOSI, as well as two chip selects, SS0# and SS1#. The +5 V
power provided to pin one of the SPX connector is protected by a 1 A resettable fuse.
This figure shows the location and pin orientation of the SPX connector.
Figure 21. SPX Connector Location and Pin Configuration