JTAG connector preference - ARM 20 vs. ARM 10

I have several products that use the standard ARM 20 pin JTAG programming connector.  I decided to investigate downsizing to the ARM 10 pin to save a little space on a new project.  It works, but most of my JTAG programmers do not have the 10 pin ARM connector option inside the casing.  A few do.  So, is the 10 pin not really used much?  Should I not use it?  Should I just stay with the common 20 pin I've used for years?  Looking for input.  Thanks.  I also noticed the 20 pin to 10 pin adapters have been discontinued, so that might be a hint as well.

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  • Of course, you don't have to have an actual connector at all - you could just have test pads, and use "pogo pins" to connect. This is great for manufacturing, but not so much for development.

    The TagConnect mentioned is a kind of "half-way house" between the convenience of a connector for development, and the economy of no connector for production.

    Here's one I prepared earlier:

    Note that you can get "retainers" to hold the TagConnect so that you don't have to take up PCB space for clips:

    For production, you just use the pads & pogo pins - you don't need the TagConnect.

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  • Of course, you don't have to have an actual connector at all - you could just have test pads, and use "pogo pins" to connect. This is great for manufacturing, but not so much for development.

    The TagConnect mentioned is a kind of "half-way house" between the convenience of a connector for development, and the economy of no connector for production.

    Here's one I prepared earlier:

    Note that you can get "retainers" to hold the TagConnect so that you don't have to take up PCB space for clips:

    For production, you just use the pads & pogo pins - you don't need the TagConnect.

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