|
![](/i/fill.gif) |
> OK, so if I'm understanding this right... The 74126 (go look it up)
> contains 4 "buffers" - gates who's output is logically equal to their
> input. But each gate also has an "enable" pin. When the enable pin is
> high, the gate works like normal. When the enable pin goes low, it's like
> the output pin isn't connected to anything any more.
Yes exactly.
> And it seems that this allows you to connect several outputs together,
> forming a kind of wired-OR configuration, provided that at all times only
> one gate is "enabled".
Yep, you could make a simple address decoder logic circuit (ie have a 2 bit
binary input to select which of the 4 buffers to enable) - that way you
would guarantee only 1 would be active at a time. If you were to connect a
2-bit counter to the 2-bit address lines you would then have a 4-bit
parallel to serial converter :-)
Post a reply to this message
|
![](/i/fill.gif) |