What exactly is JTAG with respect to embedded systems?

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maverickr

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JTAG

hai,
can anybody tell me what exactly is JTAG(joint test action group) with respect to embedded systems in relation to arm architecture.

also macrocell and emulation ??

thanks
ramya
 

Re: JTAG

Thats a lot of questions which require very long answers, you are better of looking at www.arm.com, there is lots of information that will help you.

Regards
NTFreak.
 

Re: JTAG

hi,
basically jtag is a protocol like rs-232etc., a minimal jtag consists of a clock pin,data pin, supply pin etc. data is sent and recievied via jtag interface. It is used mostly in in system circuit programming.
pimr
 

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