transgalactic
Newbie level 6
build a sinchronic counter modulu 4 that counts up and down
the counter has a control input X that desides if it counts up or down
i cant understand the part of x=1 in the situation table
it should count down then it should be D>C>B>A
i dont know why they have written the x=1 part the way they did it
https://img503.imageshack.us/my.php?image=img86821gz9.jpg
plus i can understand the next step of using the exitation table
i cant see what two numbers they take each time
for the exitation table
how they build it??
https://img394.imageshack.us/my.php?image=img86831wa5.jpg
the counter has a control input X that desides if it counts up or down
i cant understand the part of x=1 in the situation table
it should count down then it should be D>C>B>A
i dont know why they have written the x=1 part the way they did it
https://img503.imageshack.us/my.php?image=img86821gz9.jpg
plus i can understand the next step of using the exitation table
i cant see what two numbers they take each time
for the exitation table
how they build it??
https://img394.imageshack.us/my.php?image=img86831wa5.jpg
