Tool/software:
Dear Engineers,
I'm using a EVM board for MSP430FR6047 to use its build in USS module for measuring the water volume. In the USS mode I noticed there is an crystal (Ceramic Resonator) as follows for making high frequency around 80 MHz form a 8MHz clock by using PLL:
In the reference design it is mentioned that the part number that has been use for the Y3 in the EVM is "AWSCR-8.00CV-T", it the datasheet of this module I see that it is mentioned that this Ceramic Resonator has built-in load capacitors:
So, why do we need extra load capacitors in the schematic for Y3 based on he reference design in the EVM? as we can see in the picture we have these capacitors assembled on the PCB:
I noticed we I program the un-touched firmware from TI, then I get an error for HSPL as follows:
Would you please let me know if these extra capacitor could be the routes cause if the issue? and what is the reason that we have these capacitors in the reference design?
Regarding R15 (22 Ohm):
What is the reason of using R15(22 Ohm), do we need it at all? and why? based on the datasheet: abracon.com/Resonators/AWSCR_CV.pdf it is mentioned a 1Mohm resistor should be used in parallel? right?
Regards,