Forum Discussion
Occasional ContributorHardware Design
"I need someone who can tell me the target impedance for the peripherals I am using"
That depends on the signalling technology used. Some lines will be LVDS or SSTL or HSTL and may require explicit
single ended or differential impedance with termination (either internally terminated or external termination resistors).Simple LVCMOS OR LVTTL lines don't require any explicit impedance characteristic.
Your peripheral datasheet will provide such info as to any expected impedance control on interface lines.
"I have not found a datasheet that says what capacitors I need on power pins, or things of the similar nature."
No real datasheet will be that explicit. You are expected to design a power supply that provides the required
steady state voltage and current, and dynamic current, to keep the power supply rails within tolerance. It is up
to you to chose the values and types of capacitors (both capacitance and ESR) to meet those goals.The power distribution worksheets that Intel supplies are a start but just that. Only a start.
"I do not want to have someone build it for me. I want to learn and build it myself. I need to learn."
What you built before was a go kart. Pretty simple and very forgiving. Now you want to build a Tesla.
I suspect your ESP32 project was a pretty simple 2 or 4 layer board.
I suspect using your target AGMF039R47A1E1V device (which has something like 4500 pins...) will require a 24-32 layer board.
I have built boards in the past with 4000 pin ASICs and we used 28 layer stackups to breakout all the signals and power planes.
Just for yucks I googled the part AGMF039R47A1E1V and came up with the following document from CERN.
I don't know what kind of resources or team you have to develop your design. I hope it is not just you.
Frequent ContributorYou are expecting way more help from a user support forum than is reasonable.
It appears to me you need the help of an experienced board design engineer that knows how to do what you are asking.
'PCB trace width' depends on what you are trying to achieve (eg. controlled impedance trace of a particular target Zo?)
and will largely depend on your PCB stackup and material choices. That is not something Intel can provide for you.
Given the data sheet you have all the information you need to build schematic and footprint symbols for a CAD application.
Intel supplies some symbols for a mainstream commercial CAD system (Cadence Allegro) but obviously can't provide those
files for every CAD system out there. You need to learn how to build these yourself.
Have you ever designed and laid out a complex board before? From the questions you ask my impression is not.
My advice is to either find a development board that gets close to what you want. Or else find an experienced design engineer.
MATRIX7878Yes, perhaps I am expecting too much, I will not deny that.
I do not need an experienced board engineer; I need someone who can tell me the target impedance for the peripherals I am using. I can figure out track width, but I need to know impedance.
I have not found a datasheet that says what capacitors I need on power pins, or things of the similar nature. Then I need to find datasheets for the I/O I have and build those too.
The most complex board I have designed is a ESP32 board.
I cannot find a development board that I want. I have already checked. Hence why I am making my own. I do not want to have someone build it for me. I want to learn and build it myself. I need to learn.
- _AK6DN_
"I need someone who can tell me the target impedance for the peripherals I am using"
That depends on the signalling technology used. Some lines will be LVDS or SSTL or HSTL and may require explicit
single ended or differential impedance with termination (either internally terminated or external termination resistors).Simple LVCMOS OR LVTTL lines don't require any explicit impedance characteristic.
Your peripheral datasheet will provide such info as to any expected impedance control on interface lines.
"I have not found a datasheet that says what capacitors I need on power pins, or things of the similar nature."
No real datasheet will be that explicit. You are expected to design a power supply that provides the required
steady state voltage and current, and dynamic current, to keep the power supply rails within tolerance. It is up
to you to chose the values and types of capacitors (both capacitance and ESR) to meet those goals.The power distribution worksheets that Intel supplies are a start but just that. Only a start.
"I do not want to have someone build it for me. I want to learn and build it myself. I need to learn."
What you built before was a go kart. Pretty simple and very forgiving. Now you want to build a Tesla.
I suspect your ESP32 project was a pretty simple 2 or 4 layer board.
I suspect using your target AGMF039R47A1E1V device (which has something like 4500 pins...) will require a 24-32 layer board.
I have built boards in the past with 4000 pin ASICs and we used 28 layer stackups to breakout all the signals and power planes.
Just for yucks I googled the part AGMF039R47A1E1V and came up with the following document from CERN.
I don't know what kind of resources or team you have to develop your design. I hope it is not just you.
