Quick Help

[abdallh]

hi every one :-
i need to exapline with example for :-
1- TTL input modules
2- BCD input modules

 

[iant]

ttl ic Transistor Transistor logic
usually 5V dc input
used for Fast inputs
BCD is binary coded decimal.
it is unrelated to the type of input card.
but it is a form of data that consists of atleast 4 inputs
you write the code to determine haw you use it

 

[abdallh]

thanks for you iant
for TTL is it different form special modules that use for fast input
about BCD modules have you any simple example to make it clear for me

 

[shooter]

look for TTL a databook from texas instrumnets.
old technique to have digital control with AND OR NAND etc.
the 7400 series was famous for this

BCD is a code for display.
the byte is divided into nibble and each nibble is for one hewdisplay.
look in wiki