1 2 Previous Next 27 Replies Latest reply on Apr 29, 2015 12:44 PM by user_242978793

    PSoC 4 Prototyping kit : Power issue

    user_350540870

      Hi All

         

      I am using a PSoC 4 Prototyping kit for a project. My system has to work on 5 Volt. When I connect the kit and other hardware to Miniprog3 and program the kit from the Creator, The project works as per the set goals. But when I disconnect the Miniprog3 after programming and give separate 5 Volt supply to the hardware, the project does not work. I have changed the VDDA and VDDD to 5 Volt in the .cydwr file System configuration as I wanted to configure ADC on 5 Volt reference. Any solution to this would be appreciated.

         

      Thanks in advance.

         

       

         

      Regards

         

      Shaunak

        • 1. Re: PSoC 4 Prototyping kit : Power issue
          user_14586677

          What board are you using ?

             

           

             

          Regards, Dana.

          • 2. Re: PSoC 4 Prototyping kit : Power issue
            user_1377889

            From your post I deduct that you are using a CY8C-049-4xxx Prototyping kit.

               

            When programming and debugging with MiniProg3 works as expected, the only changes appear to be the 5V supply.

               

            Can you please check your 5V for stability (ripple, noise, tolerance) using a scope and the usual test-methods

               

             

               

            Bob

            • 3. Re: PSoC 4 Prototyping kit : Power issue
              user_14586677

              From your post I cannot deduct what board you are using, is it (042)

                 

               

                 

                 

               

                 

               

                 

               

                 

               

                 

               

                 

               

                 

               

                 

               

                 

               

                 

              or this (049) -

                 

               

                 

              CY8CKit-049

                 

               

                 

              or this (044) ?

                 

               

                 

              • 4. Re: PSoC 4 Prototyping kit : Power issue
                user_1377889

                @Dana,

                   

                maybe I'm wrong, but I thought that the -42 and the -44 are named "Pioneer", while the -49 is named "Prototype"

                   

                 

                   

                Bob

                • 5. Re: PSoC 4 Prototyping kit : Power issue
                  user_350540870

                  @Dana and Bob: I am using CY8CKIT-049 42xx.

                     

                  @Bob: I am using an Industrially tested power supply, so durability is not an issue.

                  • 6. Re: PSoC 4 Prototyping kit : Power issue
                    user_1377889

                    Nonetheless I would suggest you to check the 5V power on the board.

                       

                     

                       

                    Bob

                    • 7. Re: PSoC 4 Prototyping kit : Power issue
                      user_350540870

                      @Bob: I checked it on board. It is coming as per the requirement.

                      • 8. Re: PSoC 4 Prototyping kit : Power issue
                        user_14586677

                        They are all prototyping, development, design boards.

                           

                         

                           

                        Dana.

                        • 9. Re: PSoC 4 Prototyping kit : Power issue
                          user_242978793

                          Here is some information

                             
                              ■   
                             
                              1.8-5 V from a regulated supply connected to VDD   
                             
                              It is important to understand that this prototyp   
                             
                              ing kit does not have any onboard ESD protection cir-   
                             
                              cuitry. Therefore, the power source for the CY8CKI   
                             
                              T-049-4xxx must be of a high quality to ensure   
                             
                              that the board is protected from any over-cur   
                             
                              rent conditions and sw   
                             
                              apped-power connections.   
                          • 10. Re: PSoC 4 Prototyping kit : Power issue
                            user_242978793

                            And this

                               
                                Power Pin Connections   
                               
                                PSoC   
                               
                                4100/4200   
                               
                                devices can be powered in regulated mode  or   
                               
                                unregulated mode. Power pin connections for these two   
                               
                                modes are illustrated in Figure 1and Figure 2   
                               
                                . In regulated mode,the internal regulators convert VDDD  input to the power supply for the digital domain. Voltages at the VDDD pins can be from 1.8 V to 5.5V.  Outputs of the regulators are also routed  to  VCCD   
                               
                                . Do not connect any external load to VCCD except a capacitor, as Figure 1shows in AN88619   
                               
                                
                                 IIn both modes, to suppress power supply noise,connect one 0.1-μF and one 1-μF ceramic decoupling capcapacitor to each power supply pin. The PCB trace between the    
                                
                                 pin and the capacitors should be as short as possible. For more information,see Appendix A:PCB laylayout Tips    
                                
                                 Sorry about the formating issues.    
                                
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                            • 11. Re: PSoC 4 Prototyping kit : Power issue
                              user_350540870

                              @bobgoar: I am afraid to say but your post on the thread is not readable and so I could not understand what you tried to convey. Can you please re-post your suggestions?

                                 

                              @all: I can not find any solution to the problem yet. Though when I put on my power supply instead of Miniprog3, give a momentary GROUND to the reset and then give HIGH to reset, the circuit works. I do not want to manually GROUND the Reset each time I power ON the circuit. This is the first time I am facing this situation, so any help would be highly appreciated.

                                 

                              Thanks in advance.

                                 

                               

                                 

                              Regards

                                 

                              Shaunak

                              • 12. Re: PSoC 4 Prototyping kit : Power issue
                                user_1377889

                                There are restrictions in the specs of the PSoC regarding power-up ramp. It might turn out that the supply does not come up fast enough. Can you generate a Power-Good signal to use it for XRes?

                                   

                                 

                                   

                                Bob

                                • 13. Re: PSoC 4 Prototyping kit : Power issue
                                  user_350540870

                                  @Bob: How can I generate a Power-Good signal?

                                  • 14. Re: PSoC 4 Prototyping kit : Power issue
                                    user_1377889

                                    External R-C and OpAmp to delay (100ms) the XRes signal

                                       

                                     

                                       

                                    Bob

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