rtd cpuModule CMX47786HX, User Manual

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CMX47786HX RTD Embedded Technologies, Inc.
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Strobe Mode:
Strobe Mode allows the strobe pin of the DIO connector to trigger an interrupt. A low to high tran-
sition on the strobe pin will cause an interrupt request. The request will remain high until the Clear
Register is read from. Additionally, the Compare Register latched in the value at Port 0 when the
Strobe pin made a low to high transition. No further strobes will be available until a read of the Com-
pare Register is made. What this implies is one must read the Compare Register then clear interrupts
so that the latched value in the compare register is not lost. To enter Strobe mode, set bits D[4:3] of
the DIO-Control register to “01”.