How can I connect an external crystal to a PSOC4S PLUS device? Can't seem to find any diagrams or specs fo rthe crystal, etc.

[rgpace]

I am using a CY8C4127AXI-S443 and need to add an external crystal to the design to improve the timing accuracy of the system clock. Where can I find the app note or information on how to add this crystal?  Thank you.

[Ekta_N · Accepted solution]

Hello Ronald,

Please refer to the schematic link below for connecting the External crystal (page 4):

https://www.cypress.com/file/443821/download

The page 12 of the datasheet gives the pins for connecting the Crystal:

https://www.cypress.com/file/396611/download

The crystal manufacturer typically provides numerical values for parameters, namely the maximum drive level (DL), the equivalent series resistance (ESR) and the parallel load capacitance (CL)

Best Regard

Ekta

[rgpace]

Thank you. So it looks like I will need to add two capacitors to each side of the crystal, correct? If the crystal's load capacitance is 8PF, then I would use approximately 12PF load caps then? I am asking since some micros have programmable load capacitance.

Best regards,

Ron