Thanks Mike,

Sounds interesting, would you happen to know where I could see a simple example of a JTAG circuit application or any part numbers of IC's using JTAG so that I can look up the data sheet.

Thanks,

Tim

-----Original Message-----
From: Michael Rigby-Jones [mailto:Michael.Rigby-Jones@BOOKHAM.COM]
Sent: Tuesday, June 03, 2003 10:43 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: JTAG


> -----Original Message-----
> From: Tim Webb [SMTP:tim_webb@AGILENT.COM]
> Sent: Tuesday, June 03, 2003 5:58 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [PIC]: JTAG
>
> What is JTAG?
>
> I keep seeing this word somewhere and I keep wondering what it is or
> stands for.
>
> What is is used for?
>
JTAG =  Joint Test Action Group.  It is a defined five pin hardware and
serial communication protocol to primarily allow JTAG equipped complex IC's
to be daisy chained together and functionaly tested in circuit.  It is also
used as a programming protocol for some devices.

Regards

Mike


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