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Chapter 4: Using the cpuModule 61
Figure 6 aDIO Match Mode
Strobe Mode
Another interrupt mode supported by aDIO is Strobe mode. This allows the strobe pin of the DIO connector to
trigger an interrupt. A low to high transition 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
Compare Register is made. You must read the Compare Register, and then clear interrupts so that the latched
value in the compare register is not lost. To enter Strobe mode, set bits [4:3] of the DIO-Control register to “01”.
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