Dear all,
We are experiencing difficulties in selecting the right IC for our application.
Can someone help us in this regard?
We need to measure distances from 50cm to 2m; and up to 15m for an extended range.
We had a look to the TDC10xx series but it seems to be limited to up to 1.5m which is insufficient.
PGA450 series seems to meet our requirements but we also need to have an external temperature sensor because of our product enclosure.
I assumed it was possible to program the OneWire bus protocol in the embedded 8051 MCU so that one GPIO pin can be used for that purpose.
A short discussion with the guy of firmware department leads us to believe the PGA450 series is not designed to use the embedded MCU as we intended to do.
Can you please confirm our assumption? Can we, or can't we, use one GPIO pin for OneWire bus?
Whether yes, where can we find the programmer's guide.
If the PGA450 is not the right IC for our design, would you please make us some suggestion?
Another possibility, is to use an additional MCU on board to measure the external temperature; and than to compute the real distance based on the PGA450 output.
I hope we do have to proceed as is.
Anyway, the programmer's guide would be usefull for my colleague to have a closer eye to the issue we've met.
I thank you for your help,
Best regards,
Sebastien M.