Help on FAILED! PSoC device is not acquried

[VaSi_3982446]

Hi,

I have aqcuired a project from a former employee that was in the final stages of development. I have the first production run of the final product and I am trying to program them.

I cannot get the PSoC processor to be recognized by the programmer. PSoC part CY8C4246AZI-L433 - verified by visual inspection of part on board

VDDA, VDDD is 5.0V

VSSA, VSSD (2) to ground

VCCD to 1uF cap to ground

VDDIO is 5.0V

There is a 10 pin header on the pcboard for programming.

pin 1 - +5v, verified with DMM and also in the programmer.

Pin 3,5,7,9 - gnd

pin 2 to pin P3[2] on chip, verified with ohm meter

pin 4 to P3[3] on chip, verified with ohm meter

pin 6,8 NC

pin 10 to pin36 (XRES) on chip with 0.1uF to gnd

I have also tried to program using creator with the same results

I have checked the connections between the PSoC and programmer header

I think the programming protocol is correct

The correct connection option is selected.

What am I missing?

[MotooTanaka · Accepted solution]

Hi,

To me everything you wrote seems to be correct.

May be you have already done it but in case you have not,

please refer to the AN88619 - PSoC 4 Hardware Design Considerations.

https://www.cypress.com/documentation/application-notes/an88619-psoc-4-hardware-design-consideration...

Chapter 4 power and the Appendix C Schematic Checklist may be some help.

In my experience, usually what we can go wrong is either power, reset pin connection and/or debugger connection.

Although I am not an expert of hardware, I would try...

(1) Check the voltage of the VCCD pin. (It should be 1.8V +/- 5%)

(2) Check if XRES is high when idle

(3) Disable the AutoDetection and set the device manually

moto

[MiNe_85951]

Hello,

The XRES pin's capacitor may have a bad effect.

The internal pull-up resistor of the XRES pin and this capacitor have a time constant.

Remove the capacitor decoupling the XRES pin.

Or try changing the Programming Mode to "Power Cycle" instead of "Reset".

Regards,