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SPX™ Expansion Bus
Up to two serial peripheral expansion (SPX) devices can be attached to the EPM-31 at connector
J19 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 1 of the SPX connector is protected by a 1 A resettable fuse.
Figure 26 shows the location and pin orientation of the SPX connector.
EPM-31 Hardware Reference Manual
Expansion Interfaces
Figure 26. J19 SPX Connector Location and Pin Configuration
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