I am facing the issue of termination on my custom PCB deisgn for the SD_Card when I remove the SD_Card the other slave DW1000 starts giving results weirdly but when the SDCard is present it gives me correct results. I am using the same SPI bus for both the chip select line is different for both and using the pull up resistor with MISO only not the other data lines but.
I think the issue is appearing due to the SCK which is same for both and bouncing of signal for empty slot of SDcard which distort the dw1000 working
with sdcard present the sdcard's internal circuit having capacitance act as filter to smooth the signal.
so now how can I terminate the SDCard slot with only resistors I do not have buffers
aslo I have checked the resistors are being used in series to terminate.
I moved your topic to an appropriate forum category @zeeshanhaider.
In the future, when creating a topic please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.
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Thanks in advance for your cooperation.
What is driving the SPI bus?
What is DW1000?
Are there other devices on the bus?
Show your schematic
Do you mean the DW1000 SPI lines already have series termination resistors?
And how long are the SPI lines?
That doesn't make sense. Termination resistors are not placed in series.
That doesn't make sense either, MISO doesn't require a pull up resistor.
Please post your schematic and PCB design and some clear photos of your board.
They do on outputs, but not on inputs.
I think we need to see links to parts, code and a picture and connection diagram of OP's build before making any recommendations. We don't even know which Arduino is used.
All explained in the sticky "how to get the best out of this forum"
Please post all relevant information and datasheets here, no links please.
Welcome!
We are here to help you as much as we reasonably can, but to properly answer your questions and help solve the problems, we need to know what we are looking at and how the parts are interconnected. An annotated schematic shows all of that and more.
Also, many of us do not have the parts in question, or our parts may be different from those shown in the posted pictures or Fritzing diagrams. That can make it almost impossible to identify wiring or hardware problems.
Follow the suggestions given by @sterretje and do the reading requested. When these guidelines are followed, it makes it much easier for us to help you. Many times we simply cannot provide a useful answer if we do not have enough accurate information.