In order to do a proper component selection, I need to know what the input and output capacitance is for the RTC pins (RTC_XTALIN and RTC_XTALOUT respectively).
I have looked at the datasheet and online, but can't seem to find a published value.
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In order to do a proper component selection, I need to know what the input and output capacitance is for the RTC pins (RTC_XTALIN and RTC_XTALOUT respectively).
I have looked at the datasheet and online, but can't seem to find a published value.
Cpkg is the capacitance across the pins (max 1.5pF).
Per Note B: "...plus any mutual capacitance (Cpkg + CPCB) seen across the AM335x RTC_XTALIN and RTC_XTALOUT signals."
This capacitance should not be confused with the input and output capacitance of the pins.
I have included a picture to show this. You'll notice the buffer inside the AM335X will have some capacitance associated with its input (Cin) and output (Cout).
This capacitance is in parallel with the external capacitors C1 and C2. Therefore the combined capacitance needs to be taken into account.
So.....I'm looking for the input capacitance of this buffer (Cin) and the output capacitance of this buffer (Cout).