[jira] [Created] (MYNEWT-425) Investigate need to set UART gpio for nrf51/52 into high drive mode for certain baud rates.

["William San Filippo (JIRA)" <ji...@apache.org>]

William San Filippo created MYNEWT-425:
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             Summary: Investigate need to set UART gpio for nrf51/52 into high drive mode for certain baud rates.
                 Key: MYNEWT-425
                 URL: https://issues.apache.org/jira/browse/MYNEWT-425
             Project: Mynewt
          Issue Type: Bug
          Components: HAL
    Affects Versions: v0_9_0
            Reporter: William San Filippo
            Assignee: Marko Kiiskila
            Priority: Minor


In reading over the uart documentation for the nrf52 (not sure if the nrf51 has the same issues) it states that at higher baud rates the gpio may need to be configured as High Drive gpio. We dont do this currently. I cannot find any discussion of when this should actually be done; guess it is a trial and error thing based on the HW. Current consumption is significantly higher when high drive is used (seems to be like 7ma more?) so this should only be done if necessary.

NOTE: this bug is really a placeholder so we dont forget about this. Not sure what we should do...



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