Re: Carte Blanche JTAG cable questions

["Charlie" <charlieDOTd@verEYEzon.net>]

"Steven Hirsch" <snhirsch@gmail.com> wrote in message 
dJqdnTuZY6R8LFbXnZ2dnUVZ_qydnZ2d@giganews.com">news:dJqdnTuZY6R8LFbXnZ2dnUVZ_qydnZ2d@giganews.com...
> Charlie wrote:
>
>> I received my Digilent JTAG programming cable ($12 + shipping) 
>> today.  I am to the understanding that it can be used to program 
>> the Carte Blanche card (slower than the more expensive cables). 
>> It has a PC parallel port connector on one end and a JTAG3 with 
>> SPI connector on the other.
>> The JTAG end is a single inline female for six pins labeled:
>>
>> TMS
>> TDI
>> TDO
>> TCK
>> GND
>> VDD  1.8 to 5.5v
>>
>> The Carte Blanche connector is male dual inline five pins in each 
>> row.
>> Obviously not a match but the Carte Blanche card comes with a 
>> matching female ten pin connector with individual leads, each 
>> with a single female connector.
>> I figure I can run wires between the female connectors on the one 
>> cable to the ones on the other if I can figure out which goes 
>> where.
>
> Easiest thing to do is what Steve suggested: Break off a 6-pin 
> length of pin header and use that to connect them.  Basically a 
> small strip of plastic with pins on 0.1" spacing sticking out on 
> both sides.

Seems like a good idea.

>
>> The Carte Blanche cable connectors are labeled:
>>
>> SOFT TMS
>> SOFT TDI
>> SOFT TDO
>> SOFT TCK
>> HARD TMS
>> HARD TDI
>> HARD TDO
>> HARD TCK
>> GND
>> CONNECT
>>
>> Do I connect to the Digilent cable to the SOFT or the HARD pins 
>> or both?
>
> Definitely not both.  I believe it would be the HARD set, but 
> don't take my word for it!  I'd much like Alex or Steve to explain 
> the distinction and uses of hard vs. soft JTAG.
>
>> Also the CB schematic shows the CONNECT pin as VREF (whatever 
>> that is).  It also says "IF YOU ARE CONNECTING THIS INTERFACE TO 
>> USER BOARD A OR USER BOARD B DO NOT CONNECT THE REF PIN. REFER TO 
>> THE APPLELOGIC WEBSITE FOR DETAILS".  Unfortunately, the 
>> Applelogic website seems to be down.  So before I fry my CB card 
>> can anyone give me a heads-up on what to do?
>
> That's definitely a Steve-or-Alex question...
>
> Steve

Thanks for answering. I considered asking Alex or Steve directly but 
thought there may be others in CSA2 who might benefit from the 
answer.  I apologize if this information is already on the 
Applelogic site but I've been unable to get the site to come up 
since receiving the cable.

Charlie