Can you use a ROM to directly implement a function in canoni

Can you use a ROM to directly implement a function in canonical sum-of-product form? True False You can use a PAL if your functions are already in minimum sum-of-product form True False Under which condition is it possible to use a PAL to implement functions in canonical sum-of-product form? The function only has three variables You can share product terms between functions The number of product terms for each function does not exceed the number of inputs of the internal OR gales There is no condition it is impossible to use a non-simplified sum-of-product

Solution

QUESTION 8 : FALSE : You need OR gates in addition to ROM to implement function in canonical sum of products form

Reason:A ROM is a combinational component for storing data. The data might be a truth table or the data might be the control words for a microprogrammed CPU.An n x m ROM can store the truth table for m functions defined on log₂n variables.But as ROM stores only product terms you need OR(sum) gates at the output of ROM to implement function

QUESTION 9 : TRUE :Yes minimised sum of products can be more efficiently implemented with PAL\'

A PAL is a programmable logic device with a programmable AND array and a fixed OR array.When implementing with a PAL there may also be some advantages to minimizing the function first. However, since you can\'t share product terms with a PAL you don\'t have to consider the form of other functions when minimizing.

QUESTION 9 :It is possible to implement function in canonical sum of products form when number of product terms in function not exceeding inputs of OR gates because as AND gates are programmable in PAL you can get required product terms and when OR gates are available with required inputs you can get sum of product function