detecting odd number 8-bit number

[julian403]

Hello, for a 8 bit number I have to do a combinational circuit which detect if the number is odd.

I searched a pattern but there isn't. What ca I do? I can't do a karnaugh for 8 bit word

 

[Vbase]

If the LSB is 1 then its an odd number.

 

[hobbyckts]

Vbase is correct. Just monitor the LSB for high and low. On basis of that reading you can able to get the odd or even number.

 

[julian403]

What do you think i must to do? Put a yes gates or a buffer or just take the bit. For the impedance I meands

 

[bigdogguru]

Simple, just the bit:

bit0 (LSb) ----> ODD signal

Can you elaborate on your design requirements? Are you implementing this design using a FPGA or CPLD?

Really no need for additional gates, unless you need a latch or a buffer to retain the signal state, of course technically at that point it no longer is classified as a combinational logic, but as sequential logic.

BigDog

 

[hobbyckts]

Any buffer could do that

 

[MSBR]

Well, you really don't need a circuit element to do that in FPGAs. Just a wire connecting the LSB of the 8-bits number to the ODD Signal. But better help could be provided if you could throw some more light upon your requirements.

MSBR