[Answered]: Distinction between a pad and a pin?
[Answered]: Distinction between a pad and a pin?
As I study the ESP32 technical reference manual, I come across the term "pad". I have intuitively been mentally thinking of these as what I would call a "pin" or a "GPIO pin" but it dawns on me that words have power and I may be wrong and too loose on my thinking. Can anyone help me comprehend a distinction (if any) between the usage of the phrase "pad" and "pin"?
Last edited by kolban on Sun Jun 24, 2018 11:27 pm, edited 1 time in total.
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Re: Distinction between a pad and a pin?
Does a qfn package have pads or pins?
Re: [Answered]: Distinction between a pad and a pin?
Thank you sir. I had to go and read what a "QFN" was. For those who didn't know (like me) it is a "Quad Flat No-leads package". See:
https://en.wikipedia.org/wiki/Quad_Flat ... ds_package
For the purposes of our ESP32 discussions, this appears to be how raw ESP32 ICs come from Espressif before being attached to PCBs. As such, an ESP32 (raw) is distributed in QFN form and the name given to the "metal" that one solders to a PCB appears to be termed a "pad".
https://en.wikipedia.org/wiki/Quad_Flat ... ds_package
For the purposes of our ESP32 discussions, this appears to be how raw ESP32 ICs come from Espressif before being attached to PCBs. As such, an ESP32 (raw) is distributed in QFN form and the name given to the "metal" that one solders to a PCB appears to be termed a "pad".
Free book on ESP32 available here: https://leanpub.com/kolban-ESP32
Re: [Answered]: Distinction between a pad and a pin?
Hmm. I knew that pin and pad mean the same thing but I thought that is because the gpio fabric has a pad for bonding on the chip. The fact that some packages have pads instead of pins makes much more sense though
my page: http://www.barth-dev.de/
Re: [Answered]: Distinction between a pad and a pin?
There are pads on a PCB and pads on a silicon wafer, the pins bridge the gap for the pads in use. A gpio is a service connected to a pad, which may be connected to a pin, which may be connected to a PCB.
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