PSoC™ 4 Forum Discussions

I am using CY8C4125PVS-482Z  for waterproof cap touch button design. It is a single button. The button width and length is 11mm. Cypress cap touch design guide specify that the button to guard clearance should be at lease 10mm and the guard thickness should be 2mm. Because our cap touch button has limited size. Can we reduce the button to guard clearance and reduce the guard thickness. Please recommend a minimum button to guard clearance and minimum guard thickness. Besides, Can we remove the outer shield surrounding the guard ring to reduce the size. What is the negative effect by removing outer shield

From the documentation, i found this recommended layer stackup:

1. Cap sensors

2. Sense traces

3. Hatched ground plane

4. PSOC and non-capsense related traces

My question is this - should layer 2 have a ground plane around the sense traces, or should layer 2 consist of ONLY the sense traces, and no other copper?

Are there any examples of determining external battery level based on resources available inside a PSoC?

The BLE_Battery_Level example offers a method to charge an external capacitor with VRef then read it back on a different pin into the ADC. That requires an external component on Vref, which is already there, but also an external connection between Vref and a GPIO pin,

Greg.

What is LVD detection default value?

http://www.cypress.com/file/369076/download

p78

Thanks

Hi,

I  am using PSoC 4 CYBLE-214009. I am looking for a way to have UART "Wake up from deep sleep" enabled at the same time get interrupts generated from three pins on the same port.

Normally this is not supported, if I try to do it PSoC creator throws an error. However my idea is to modify the generated source or the UART IRQ to add the three pins to the mask. Such that if any of the pins or the UART go low then the UART ISR will get called and in there I can figure out the true source of the interrupt.

Does anyone know if this is possible? If so any guidance on the implementation is much appreciated.

Regards

MB