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PSoC 4

Anonymous
Not applicable

Has anybody ever had a need to connect the serial stream (both Tx & Rx) from a SCB Hardware Uart to internal logic for mux-ing demux-ing before sending to an external psoc pin?  I am struggling with how to do that since the HW_UART using an SCB goes directly to psoc external pin.  I could solve the problem by sending the signal back into the psoc on another pin but that would waste 2 pins.

   

The attachment shows what I'm trying to do...ie on the left is my HW_UART and on the right is an example of simple serial data routing logic.  I basically just want to go directly from the UART into my logic without having to go off-chip.  As you can see there is not a connection between the two because I don't know of a way to separate the SCB HW_UART away from the dedicated pin.

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5 Replies
Anonymous
Not applicable

Here is pic of basic schematic

   

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Anonymous
Not applicable

New pic is better example simplified by using simple mux/demux

   

I just need a method to tie Uart directly to mux/demux without going off chip?

   

   

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Anonymous
Not applicable

Attaching as pdf

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Bob_Marlowe
Expert II

The SCB components in a PSoC4 use dedicated pins which cannot be captured and re-routed. You can only do what you want to is using an UDB based component.

   

 

   

Bob

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Anonymous
Not applicable

Very well.  I had hopes there was a way to get around that.

   

We wanted to save UDB resources for other uses.

   

Thank you for your help

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