PSoC5LP Power Supply | Cypress Semiconductor
PSoC5LP Power Supply
I am working on a board that will be using the CY8C5868AXI-LP035 like in the CY8CKIT-050 and I am a little bit confused about the proper way to supply the PSoC properly. I plan on powering the PSoC in unregulated mode so I have done the following.
Short both of the VDDDs and VCCDs bypass each pair with 1uF and .1uF caps.
Short VDDA and VCCA and bypass the pair with a 1uF and .1uF cap.
Bias VDDIO1 and VDDIO2 with VDDD and bypass each with .1uF cap.
Bias VDDIO0 and VDDIO3 with VDDA with .1uF cap.
VSSDs and VSSAs have been connected to their respective grounds.
All of that was fine, but here is where my confusion starts to come in. Should I have separate regulators on my board to supply VDDD and VDDA? Should VSSD and VSSA be their own layers on the board, should they be on the same layer but separated from each other? Should they actually be the same, i.e. shorted together? I have been looking at the schematic for the dev kit and it seems to me like the analog and digital supplies are shorted, but I am not sure. I really don't know what considerations I should be taking to figure these things out. I would really appreciate if I could have some guidance into this.