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Original question:

CCS: Code Composer watch do not see the variable value

How to control the input of ts3a5018 ?

balauroiu radu
Intellectual 260 points
Other Parts Discussed in Thread: TS3A5018

Hello ,

I'm trying to work with an ts3a5018 analog switch ( 4 analog switches ). I read the datasheet but nothing was clear about how to control this switches via IN input.

It doesn't said if IN is a serial ( i2c , spi ,  etc... ). It's someone who worked before with this device and it can share some hardware diagram or some code to clarify

how to control those switches.

Thanks.

  • 0
    TI__Prodigy 280 points

    Hi Balauroiu,

    In this device, the /EN and IN pins are just logic inputs. No communications protocol is necessary for their operation. In the datasheet, you can see how the VIH/VIL logic input levels vary with supply voltage and you must satisfy these conditions based on your chosen VCC. If you scroll further, you'll also see the logic table which describes how the outputs change based on /EN, IN inputs.

     

  • 0 in reply to Paul Gomez - TRX
    Intellectual 260 points
    Hello Paul ,

    I read the whole datasheet and i saw this table, but i want to know how the signal wave of EN and IN looks like when you want to connect let's say COM1 to NC and COM2 to NO. In the datasheet at the first pages is an imagine which shows how the pins are connected internally in the circuit, and the IN pin and EN pin are connected to Logic Control. But in the datasheet is not described how this Logic Control works.
    In the table that you showed to me is described where COM is connected for each value of EN and IN, but in the circuit you have 4 COMs and 1 IN so my question is how to select the COM ( from the group of 4 ) you want to modify its state?
  • 0 in reply to balauroiu radu
    TI__Prodigy 280 points

    Hi Balauroiu,

    I think I understand now. You would like the individual control of each COM channel based on /EN and IN pins. Unfortunately, the diagram shown is identical for each channel. In other words, the IN control pin is common to all channels.

    What I believe you are searching for is the ability to switch outputs on 4 channels individually, is that correct? May you share some details about your intended application so we can help identify the right device?

    For now, may I suggest looking at this device which has individual channel control using independent Select pins.

    TMUX1111