Routing of a bi-directional signal through some logic ic
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Routing of a bi-directional signal through some logic ic

 
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Frank
Guest
Posted: Thu Nov 17, 2005 1:35 am    Post subject: Routing of a bi-directional signal through some logic ic Reply with quote
Hi all guys of knowledge!

What logical ic can be used for the purpose of routing a bi-directonal data
signal? I want to be able to choose with 4 bits from my microcontroller
witch input of this ic's 16 ports should route to a common signal pin on the
microcontroller (ex. capture on input high). More details on what I mean,
see http://deluxe.sytes.net for a drawing.

Tnx in advance,
Frank

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Mark VB
Guest
Posted: Thu Nov 17, 2005 1:35 am    Post subject: Re: Routing of a bi-directional signal through some logic ic Reply with quote
Frank wrote on 17/11/2005 00:18
Quote:
Hi all guys of knowledge!

What logical ic can be used for the purpose of routing a bi-directonal data
signal? I want to be able to choose with 4 bits from my microcontroller
witch input of this ic's 16 ports should route to a common signal pin on the
microcontroller (ex. capture on input high). More details on what I mean,
see http://deluxe.sytes.net for a drawing.

Tnx in advance,
Frank


What exactly would that bi-directional data signal be ? And what about
the lines that aren't addressed at the moment ? Should they be at a
logic level, or in 3-state ? Is it possible to use a direction-signal ?

At this moment and with the info provided, i could only think of a
16-channel Analog Multiplexer/Demultiplexer (e.g. 74HC4067).



HTH,
Mark Van Borm
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William P.N. Smith
Guest
Posted: Thu Nov 17, 2005 7:24 am    Post subject: Re: Routing of a bi-directional signal through some logic ic Reply with quote
"Frank" <frthaule@broadpark.no> wrote:
Quote:
What logical ic can be used for the purpose of routing a bi-directonal data
signal?

An analog mux?

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Jamie
Guest
Posted: Thu Nov 17, 2005 9:35 am    Post subject: Re: Routing of a bi-directional signal through some logic ic Reply with quote
Frank wrote:
Quote:
Hi all guys of knowledge!

What logical ic can be used for the purpose of routing a bi-directonal data
signal? I want to be able to choose with 4 bits from my microcontroller
witch input of this ic's 16 ports should route to a common signal pin on the
microcontroller (ex. capture on input high). More details on what I mean,
see http://deluxe.sytes.net for a drawing.

Tnx in advance,
Frank

http://www.analog.com/en/prod/0,,768_836_ADG706,00.html


Quote:



--
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
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Frank
Guest
Posted: Thu Nov 17, 2005 5:35 pm    Post subject: Re: Routing of a bi-directional signal through some logic ic Reply with quote
This signal is based on the 1wire protocol. All the devices connected to
each 16 ports, will be default logic high. Can I still use this analog
multiplexer?

Regards,
Frank

Quote:

What exactly would that bi-directional data signal be ? And what about
the lines that aren't addressed at the moment ? Should they be at a logic
level, or in 3-state ? Is it possible to use a direction-signal ?

At this moment and with the info provided, i could only think of a
16-channel Analog Multiplexer/Demultiplexer (e.g. 74HC4067).



HTH,
Mark Van Borm
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Frank
Guest
Posted: Fri Nov 18, 2005 1:35 am    Post subject: Re: Routing of a bi-directional signal through some logic ic Reply with quote
"Mark VB" <mark@vb.invalid> wrote in message
news:dV8ff.51274$4F6.3164229@phobos.telenet-ops.be...
Quote:
Frank wrote on 18/11/2005 00:12
Got it! The 4051 Multiplexer/Demultiplexer can be used for this purpose.
For digital operation, tie the Vee (Negative Supply) to ground. Now I can
multiply the ports on the microcontroller.

Vee should always be tied to Gnd. The 4051 is an 8-channel
Multiplexer/Demultiplexer. But you needed 16 channels: the 4067.

Mark VB

Thanks!

Frank
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Mark VB
Guest
Posted: Fri Nov 18, 2005 1:35 am    Post subject: Re: Routing of a bi-directional signal through some logic ic Reply with quote
Frank wrote on 18/11/2005 00:12
Quote:
Got it! The 4051 Multiplexer/Demultiplexer can be used for this purpose. For
digital operation, tie the Vee (Negative Supply) to ground. Now I can
multiply the ports on the microcontroller.


Vee should always be tied to Gnd. The 4051 is an 8-channel
Multiplexer/Demultiplexer. But you needed 16 channels: the 4067.

Mark VB
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Mark VB
Guest
Posted: Fri Nov 18, 2005 1:35 am    Post subject: Re: Routing of a bi-directional signal through some logic ic Reply with quote
Frank wrote on 17/11/2005 17:15
Quote:
This signal is based on the 1wire protocol. All the devices connected to
each 16 ports, will be default logic high. Can I still use this analog
multiplexer?

Regards,
Frank


Yep, no problem.

Mark VB
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Frank
Guest
Posted: Fri Nov 18, 2005 1:35 am    Post subject: Re: Routing of a bi-directional signal through some logic ic Reply with quote
Got it! The 4051 Multiplexer/Demultiplexer can be used for this purpose. For
digital operation, tie the Vee (Negative Supply) to ground. Now I can
multiply the ports on the microcontroller.
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