I need to have a 2-digit down counter based on read-only memory RAM or ROM and to show the count on a 7-segment display, all done in Logisim or in another program.
Can someone help me thanks

 

How far have you gotten? Please post your schematic. Note that t try his is homework “help”; you need to show your work first.

 

How far have you gotten? Please post your schematic. Note that t try his is homework “help”; you need to show your work first.

I have only been able to do it with a hexa decimal display, I don't know how to connect it to a 7 segment display and I don't know how to make the counter go from 99 to 1

 

Welcome to AAC!

I need to have a 2-digit down counter based on read-only memory RAM or ROM and to show the count on a 7-segment display, all done in Logisim or in another program.

It would be helpful if you posted the complete text for the problem.

If you use a look up table, you still need something to address the circuit. Are you allowed to use BCD to 7-segment decoders?

 

Welcome to AAC!

It would be helpful if you posted the complete text for the problem.

If you use a look up table, you still need something to address the circuit. Are you allowed to use BCD to 7-segment decoders?

I gave all the problem, but I affirm that a decoder can be used, I had not thought about it before

 

I need to have a 2-digit down counter based on read-only memory RAM or ROM and to show the count on a 7-segment display, all done in Logisim or in another program.
Can someone help me thanks

How big it your ROM/RAM? How wide is it?

If it is 16-bits wide and you have at least 100 cells, the solution is trivial.

 

I affirm that a decoder can be used

Logisim doesn't have a BCD to 7-segment decoder. Do you plan to build one?

 

Hint: it is nothing more than a logic truth table that takes a 7bit input and maps it to a 14bit output. Granted it is a truth table with 100 entries so it is 'tedious' but not hard. To make it less tedious, use a computer program (any language you like) to generate the table. Then you just program the ROM with the table.