You can use P1 for the feedback resistor and at the same time use it for ISSP also. When you are programming the chip using the ISSP, the feedback resistor will not affect the ISSP operation. Check out AN2014 for more details about ISSP. As long as the resistor load on the ISSP pins is greater than 1K, there should be no problem.
Thank you very much.
I'm doing a project on Capsense with 4 buttons, 1 slider(8 sectors/segments) and 4 LEDs using CY8C21534-24PVXI. My buttons were working fine (I could lit the LEDs for each tapping on the buttons), but the sliders were not working properly (only 5 sectors were working; rest were not working).
I'm also trying to use Multichart in this project using TX8SW user-module. I couldn't use P1 for the Data out (I2C SDA) purpose as it is used by feedback resistor (10K). Then, I tried connecting 10K resistor in P1 (used by ISSP), and configuring P1 for I2C SDA, but the LEDs were flashing without finger presence.
I'm using C code from Cypress examples and it is attached below.
Please help me out from this issues.
Sorry, there's a mistake in my previous mail, I'm using feedback resistor of 2K(not 10K) and Cmod of 10nF.