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SPWF04SA datasheet clarifications

Michael Stevens
Associate II
Posted on April 03, 2018 at 18:43

Hi ST team,

Looking over the device datasheet, I had expected to see maximum current consumption at least under TX and RX conditions so I can design power management appropriately.  When this information is missing, I typically look for a maximum ICC specification as the next best point of reference but that's missing as well.  Has there been any testing or is there a maximum ICC by device design to which I can design my power management solution?

Second item:

HSE and LSE signals;  I found a post at 

https://community.st.com/0D50X00009XkeJJSAZ

  that says to ignore these pins and float.  The X-NUCLEO board ties these to a crystal and RTC respectively.  What purpose do these serve?  Also, if these are inputs, shouldn't these be tied to a logic level to prevent oscillating inputs?

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