I was trying to implement parity generator for 8 bit message using IC 74180. I understand the purpose of all the pins but don't what do those two output pins namely summation(Even) and summation(odd) mean? I couldn't find any clear explanation anywhere else.
The word-length capability is easily expanded by cascading.
Even and Odd come from a previous 74180 to allow more than 8 bits of parity.
∑Even will be true if all 8 bits AND Even are an even number. Even true + 00000000 means ∑Even is true.
Even false + 00000001 means ∑Even is true. Odd parity from previous sections and odd parity in this section means even parity.