1Wire UART circuit

[jhd]

Hello,

There is some AN or example aobut 1Wire UART circuit for Kinetis?

Best regards

[kerryzhou]

Hi Javier Hernandez ,

  Please tell me which kinetis chip you are using? Tell me the chip part number, I will help you to check whether that chip can support the single wire UART or not.

Some kinetis chips UART module can support the single-wire operation, about the document, you can refer to the chip reference manual directly.

Take K22 chip as ane example:

You also can check your kinetis chip reference manual by yourself.

Wish it helps you!
Have a great day,
Kerry

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------

[jhd]

Thank you,

I'm using de KL03 32kb but has not DMA, so I'm going to use KL05. MKL05Z32VFM4 or MKL05Z32VFK4

Best regards

[kerryzhou · Accepted solution]

Hi Javier Hernandez,

    Thank you for your updated information.

    So, please refer to the KL05 reference manual, chapter:

   37.3.4.3 Single-wire operation

  This chip UART0 also support the single-wire operation.

Wish it helps you!
Have a great day,
Kerry

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------

[jhd]

Sorry Kerry,

In KL03 Reference Manual say that KL03 has open-drain in uart so is possible to 1-wire, but KL03 has not DMA module, I think.

ISO7816 protocol is intended to be handled in software for this product. To support smart card readi...

This circuits should be works:

[jhd]

Perfect!