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IR length for TI DSP

Started by philiphoule216 January 15, 2009
I am working on a project which requires bypassing the JTAG IR for a
TMS320F28335. Does any know what the IR length for this CPU is?

Phil



On Jan 15, 7:03&#2013266080;pm, "philiphoule216" <philiphoule...@gmail.com> wrote:
> I am working on a project which requires bypassing the JTAG IR for a > TMS320F28335. Does any know what the IR length for this CPU is? > > Phil
Hi Phil, for the TMX320F28335 the IR lenght is 38. I assume it is the same with TMS version Regards, Mitja
>On Jan 15, 7:03=A0pm, "philiphoule216" <philiphoule...@gmail.com> wrote: >> I am working on a project which requires bypassing the JTAG IR for a >> TMS320F28335. Does any know what the IR length for this CPU is? >> >> Phil > >Hi Phil, > >for the TMX320F28335 the IR lenght is 38. I assume it is the same with >TMS version > >Regards, Mitja >
Thanks Mitja. I just want to confirm that we are talking about the length of the JTAG TAP instruction register (IR) for the TI DSP TMS320F28335, correct? Also, is there any other info you could share with me (or direct me to) regarding JTAG operation on TI DSPs? Seems that TI is a bit squirrely about this topic. Phil
On Jan 16, 3:17&#2013266080;pm, "philiphoule216" <philiphoule...@gmail.com> wrote:
> >On Jan 15, 7:03=A0pm, "philiphoule216" <philiphoule...@gmail.com> wrote: > >> I am working on a project which requires bypassing the JTAG IR for a > >> TMS320F28335. Does any know what the IR length for this CPU is? > > >> Phil > > >Hi Phil, > > >for the TMX320F28335 the IR lenght is 38. I assume it is the same with > >TMS version > > >Regards, Mitja > > Thanks Mitja. > I just want to confirm that we are talking about the length of the JTAG > TAP instruction register (IR) for the TI DSP TMS320F28335, correct? Also, > is there any other info you could share with me (or direct me to) regarding > JTAG operation on TI DSPs? Seems that TI is a bit squirrely about this > topic. > Phil
Yes we are talking about the same thing. I am sorry I do not have any specific information regarding TI's implementation of JTAG, besides experiences from daily use for debugging and programming purposes. I have just two DSP's (one from the TMS320F24xx series with IR = 8, and already mentioned F28335 with IR=38) on one XDS510 compatible emulator, and the emulator drivers needed to know how to split whole IR chain. From what have I heard you might be able to get more info on TI's JTAG if you sign a NDA with TI. Of course they have to consider you worthy enough. Regards, Mitja