Hello im trying to build a counter to count up until 10MHz using Logisim. Does this software have any limitations ? because the count doesnt work. i think i have connected it well based on the datasheet.


here i provide the corresponding file

 

look at the count

 

What signal is on the bottom trace that goes from 0 to -1 and back to 0? That is the key.

ETA: If you write the successive counts in binary, it should make it obvious where the problem is located.

51455 = 0b 1100 1000 1111 1111

55296 = 0b 1101 1000 0000 0000

When the least significant counters rolled over you incremented the wrong counter and one of the counters remain unchanged. That is the one you should have incremented.

 

Make sure that you have your reset (clr) and load pins pulled high, don't leave them open, no matter what you may think!

 

Make sure that you have your reset (clr) and load pins pulled high, don't leave them open, no matter what you may think!

Excellent point, but it does help to configure the carry chain properly.