Control of Single Flip-flops



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The control gates for the seven flip-flops can be determined in a similar manner. For example, Table 5-6 shows that lEN may change as a result of the two instructions ION and !OF.  

pB7: lEN +-1

pB6: lEN +-0

where p = D71T3 and B, and B, are bits 7 and 6 of lR, respectively. Moreover, at the end of the interrupt cycle lEN is cleared to 0.

RT2: lEN +-0

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