PSoC 5 PCB Design Using Eagle

I'd suggest getting a PSoC 4 Pioneer Kit.  It's only US$25 and has both a PSoC 4 and a PSoC 5.  The PSoC 5 is normally used to program and debug the PSoC 4, but you can reprogram it for other purposes.  There are lots of information and projects at the link to get your started.

Thanks for the advice John Beetem. But my idea isn't to buy a kit or something already made. I'd like to design my own PCB using the PSoC 5 microcontroller to take advantage of all the programming software developed for the PSoC already. If I had just the PSoC 5 microcontroller, how would I design a PCB containing just the power connections, a USB interface, and a way to send a PWM signal to a servo? I'd like to do something similar to the FreeSoC (http://freesoc.net/) or EzPSoC3 (http://dangerousprototypes.com/docs/EzPSoC3). I'd like some suggestions or guidance as to how to read a datasheet to learn how to design everything on Eagle CAD.

Thanks

I thought of the PSoC 4 Pioneer Kit because it sounded like you needed to do some software, and it's generally easier to get that working on a tried-and-true development board first, and then port the working code over to your own design.  As far as making your PC board, I would suggest starting with FreeSoC since it's open hardware with published schematics and layout.  You can then omit what you don't need and add other things that you do.

I don't know what to suggest about how to read a data sheet.  I learned how to read data sheets as part of an undergrad ECE degree.  Data sheets are designed to provide data quickly to experienced engineers who know what they're looking for, so there's a steep learning curve for newbies.  In this case I'm talking about electrical data sheets which specify voltages, currents, and timing.  There are also technical reference manuals which describe the functionality of chips.  They're sometimes also called "data sheets", even if they're 1000 pages long.

There are probably EE books out there that talk about reading data sheets, but it's been so long since I taught EE that I wouldn't be able to make a decent recommendation.

Good idea. I have the PSoC 5 development kit and have working software I'd like to port to my own PSoC 5 board. I not too familiar with PCB design which is why I'm asking for all this guidance. I'll take a look at how the FreeSoC was done and go from there. Also, one other question. Are the PSoC 3 and PSoC 5 microcontrollers the same? For example, can I follow the same traces for USB connections on the PSoC 3 and just replace the PSoC 3 microcontroller with a PSoC 5 microcontroller?

Good idea. I have the PSoC 5 development kit and have working software I'd like to port to my own PSoC 5 board. I not too familiar with PCB design which is why I'm asking for all this guidance. I'll take a look at how the FreeSoC was done and go from there. Also, one other question. Are the PSoC 3 and PSoC 5 microcontrollers the same? For example, can I follow the same traces for USB connections on the PSoC 3 and just replace the PSoC 3 microcontroller with a PSoC 5 microcontroller?

Hi Justin,

By traces, do you mean schematic? After you've worked with the dev kit as John Beetem has explained (it is the most valuable resource to proving the code and hardware design), prepare a schematic, and use the development kit documentation (circuit diagram) and the datasheets for a reference. There is no getting away from the datasheets, regardless of the dev kit documentation. I too can't recommend any book specifically for this, some of it is just through practise that you'll begin to know what topics to expect in datasheets and to follow any advice in the datasheet strongly.

Usually after that it is very advisable to inspect the gerber files of the reference design/dev kit (if available)to study them as a reference to identify any areas of your eventual PCB layout that you need to pay close attention to.

Also, if you're new to PCB design, don't forget mechanical considerations like screw-holes :-)

Justin E wrote:

 

Are the PSoC 3 and PSoC 5 microcontrollers the same? For example, can I follow the same traces for USB connections on the PSoC 3 and just replace the PSoC 3 microcontroller with a PSoC 5 microcontroller?

I don't know if the PSoC 3 and PSoC 5 pinouts are the same.  That question is easily answered by looking at the data sheets, since they show the pinouts for each package offered by the chip family.  Look for "pinout" and/or "pin description" in each data sheet's table of contents and compare the pinouts.  The data sheet also shows the precise dimensions of each package and the physical location of each pin, or else refers to a package data sheet with that information.

Hello Justin,

Eagle Schematic and PCb software has the ability to make parts decals and pcb layouts.  You first need to create these parts in the library.  You need to look at the datasheet the manufacture provides on their website to determine the pad size and locations.

The PSoC 3 and the PSoC5  may or may not be using the same package so you need to look at the datasheet.

I noticed you mentioned USB lines.  You need to make sure the the USB+ and USB-  lines have 75 ohm impedance and they are the same length with very little distance between the microprocessor and the USB connector.

If you need help with your schematic or PCB layout I can help.   I use Eagle 6.2.

Hope this helps,

Chris Pinter

http://www.pinterec.ca

Hi,

If you need Cypress/PSoC Eagle Cad Symbols and PCB outlines (arduino, etc.) you can can get them from my Github repo at :

https://github.com/PatternAgents/PCB_Libraries

There are also some USB interface examples at :

https://github.com/PatternAgents/TinySoc

have fun, best regards,

Tom Moxon

http://www.patternagents.com