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
Tnx in advance, Frank
Frank wrote on 17/11/2005 00:18
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
An analog mux?
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
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.
Frank wrote on 17/11/2005 17:15
Yep, no problem.
Mark VB
Frank wrote on 18/11/2005 00:12
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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