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RE: [lpc2000] JTAG - RTCK ? / Building DIY wiggler w/74VHC14

RE: [lpc2000] JTAG - RTCK ? / Building DIY wiggler w/74VHC14

2006-01-20 by Soentgerath, Guido

Thank you all for your answers !
 
By the way, do you know which pin of the jtag connector is used for RTCK
?
Tom, is there something in the BDI2000 manual ?
 
Ed, I think it would be good to add RTCK even it is  not in the original
wiggler design.
 
Have a nice day,
Guido

________________________________
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From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf
Of Dan Beadle
Sent: Mittwoch, 18. Januar 2006 17:29
To: lpc2000@yahoogroups.com
Subject: RE: [lpc2000] JTAG - RTCK ?


It is the Return Clock.  It is used for deglitching the return signal.
Ideally, the chip under test would have zero delay getting the clock on
board.  But it does have some delay. The RTCK is the image to of the
JTAG clock being used by the chip. For very fast clocking, this allows
the debugger to sync up with the chip under test.



  _____  

From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf
Of Leon Heller
Sent: Wednesday, January 18, 2006 3:03 AM
To: lpc2000@yahoogroups.com
Subject: Re: [lpc2000] JTAG - RTCK ?



----- Original Message ----- 
From: "Soentgerath, Guido" <Guido.Soentgerath@...>
To: <lpc2000@yahoogroups.com>
Sent: Wednesday, January 18, 2006 9:05 AM
Subject: [lpc2000] JTAG - RTCK ?


> Hello all,
> can someone give me an explanation for RTCK  or  a hint where I can
find
> some more infos about this signal ?
> Thanks in advance!

I found a document on the ARM web site a long time ago which describes
the 
JTAG interface in detail. Can't remember where, though.

Leon 




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Re: JTAG - RTCK ? / Building DIY wiggler w/74VHC14

2006-01-20 by derbaier

--- In lpc2000@yahoogroups.com, "Soentgerath, Guido"
<Guido.Soentgerath@s...> wrote:
>
> Thank you all for your answers !
>  
> By the way, do you know which pin of the jtag connector is used for RTCK
> ?

The Lauterbach Trace32 uses Pin-11 of the 20 pin JTAG connector for
RTCK.  They have usually been quite good at sticking with ARM's
specifications, so that is *probably* the pin specified by ARM.
Unfortunately, AN31 predates ARM's use of RTCK, so it does not mention
it at all.

-- Dave

Re: [lpc2000] JTAG - RTCK ? / Building DIY wiggler w/74VHC14

2006-01-20 by Tom Walsh

Soentgerath, Guido wrote:

>Thank you all for your answers !
> 
>By the way, do you know which pin of the jtag connector is used for RTCK
>?
>Tom, is there something in the BDI2000 manual ?
>  
>
I don't use the RTCK signal.  The manual says something about a "special 
cable",  they probably added one more wire to the present cable that I 
have...  The wire they use is some 11 or 15 strand (maybe even 19 
strand) super flexible stuff.

TomW


-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
----------------------------------------------------

Re: [lpc2000] JTAG - RTCK ? / Building DIY wiggler w/74VHC14

2006-01-20 by Tom Walsh

Soentgerath, Guido wrote:

>Thank you all for your answers !
> 
>By the way, do you know which pin of the jtag connector is used for RTCK
>?
>Tom, is there something in the BDI2000 manual ?
>  
>
It is Pin 11 on the 20 pin connector, 14 pin connector doesn't show any.

Myself, I put a 10 pin header on my board and just moved the wires 
around on the 14pin cable...

TomW



-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
----------------------------------------------------

RE: [lpc2000] JTAG - RTCK ? / Building DIY wiggler w/74VHC14

2006-01-20 by Soentgerath, Guido

Thanks Tom, Dave,
it seems that pin 11 is the RTCK pin.
 
Guido
 

________________________________
Show quoted textHide quoted text
From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf
Of Tom Walsh
Sent: Freitag, 20. Januar 2006 14:13
To: lpc2000@yahoogroups.com
Subject: Re: [lpc2000] JTAG - RTCK ? / Building DIY wiggler w/74VHC14


Soentgerath, Guido wrote:

>Thank you all for your answers !
> 
>By the way, do you know which pin of the jtag connector is used for
RTCK
>?
>Tom, is there something in the BDI2000 manual ?
>  
>
It is Pin 11 on the 20 pin connector, 14 pin connector doesn't show any.

Myself, I put a 10 pin header on my board and just moved the wires 
around on the 14pin cable...

TomW



-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
----------------------------------------------------





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