If CLKA3(14pin) is not used, please tell me pin proccessing of unused pin(CLKA3) as an "EMI" countrmeasure? Is CLKA3(14pin) open? Or is it necessary to add the capacitor? (Other port condition): CLKB1, CLKB2, CLKB3, and CLKB4 are not driven.
In addition, they found the following application note ,it is described that If EMI is a problem, mount a 5pF to 10pF capacitor during testing on page 6.
Typically, the unused output pins are left open.
If the EMI countermeasure for the output pin is desired, a capacitor could be attached.
This method will reduce EMI for higher frequency, but it will also increase the power consumption.