No, I honestly mean a Cirrus Logic EP7212-CV-D to be specific. A
precursor to the 7312 which shares much of its functionality.
A JTag header. This would have four pins? There is a non-soldered
connection with four pins on it near/next to the CPU.
On Tue, 2005-11-08 at 09:24 -0500, Doug Sutherland wrote:
> Do you mean Cirrus Logic ep7312? I have some of those here. All of these
> ARM chips have JTAG built-in, it's part of the ARM core spec. So the CPU
> in that rocketbook definitely has the capability for JTAG, it might even
> have a header or special plug for JTAG connection. Even if it doesn't,
> it's possible to connect to the JTAG pins, others have done this on ARM
> based products like gameboy. The JTAG is used to program the flash on
> the device and also for debugging.
> -- Doug
> Jaapjan Tinbergen wrote:
> >With all the embedded developers here I have a curiousity.
> >As a regular office programmer I have no experience in embedded
> >programming at all even though it interests me quite much.
> >To further my interest in the field I have aquired an old Rocketbook
> >1100 from gemstar. Though a number of utilities exist for it, I am
> >unable to do much with it. I am sure noone can help me with this.
> >I also opened the device itself to look at its logic board. It is
> >powered by a reasonably familiar processor, an cirrus lmaverick ep7212.
> >I was wondering what, how or if you can indentify possible JTAG (a word
> >I heard around here, for debugging at low lever?) pins and make use of
> >Kind regards,
> >Long time gumstix lurker and infamous author of 'Gumtix and eInk'
> >artikel on OSNews months back.
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