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hani_a said:Hello people,
does anyone know for sure if inverted TTL means negative logic? if not, can one explain to me what inverted TTL..
Thanks!
if this is in response to the other post then inverted TTL is the output from a microcontroller for controlling serial devices, so when something is sent from the controller to the recieving device - the signal is the opposite of what a full RS232 serial device would show - eg a '1' on RS232 is actually -12v, and a '0' is +12v, although if you are dealing with inverted TTL in this sense a '1' is +5v and a '0' is 0v - This is the way that many serial devices work to negate the effect of having to use MAX232 ect. to provide the +12v and -12v for full RS232 spec.
I hope that makes sense to you :?