Routing of a bi-directional signal through some logic ic

[Frank]

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

 

[Mark VB]

Frank wrote on 17/11/2005 00:18

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

 

[William P.N. Smith]

"Frank" <frthaule@broadpark.no> wrote:

What logical ic can be used for the purpose of routing a bi-directonal data
signal?

An analog mux?

 

[Jamie]

Frank wrote:

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

--
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5

 

[Frank]

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

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

 

[Frank]

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.

 

[Mark VB]

Frank wrote on 17/11/2005 17:15

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

 

[Mark VB]

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

 

[Frank]

"Mark VB" <mark@vb.invalid> wrote in message
news:dV8ff.51274$4F6.3164229@phobos.telenet-ops.be...

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