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Which priority encoder is used in MC68000?(a) 4-to-2 priority encoder(b) LS148 7-to-3(c) 2-to-4 priority encoder(d) LS148 3-to-7The question was asked in examination.My question is taken from The mechanism of Interrupts topic in portion Interrupts and Exceptions of Embedded Systems

Answer»

Right choice is (b) LS148 7-to-3

Explanation: The LS148 7-to-3 PRIORITY encoder is used in MC68000. This converts the seven EXTERNAL pins into a three-bit binary CODE.



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