5 per 4 bits, so anything over, but not including, 1001
312
3 inputs and 2 outputs
3 inputs and 2 output
5 per 4 bits, so anything over, but not including, 1001
In a Binary-Coded Decimal (BCD) adder, the valid BCD digits range from 0000 (0) to 1001 (9), which accounts for 10 valid combinations. The remaining combinations from 1010 (10) to 1111 (15) are considered "don't care" conditions because they do not correspond to valid BCD digits. Therefore, there are six "don't care" conditions in a BCD adder: 1010, 1011, 1100, 1101, 1110, and 1111.
i dont know i dont care
just one
dont care!
dont know dont care
m full adder
A full adder takes two inputs plus carry in and produces one output plus carry out. You need four full adders to add two 4 bit words. (No half adders required.)Or: for the lowest bit you can use a half-adder (no input carry).
No, the adder snake is not currently classified as endangered. However, they are protected in many areas due to declining populations and threats such as habitat loss and fragmentation. Conservation efforts are in place to monitor and protect adder populations.