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Altera_Forum
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15 years ago

External JTAG port on DK-DSP-3C120 - EthernetBlaster

Hi All, Has anyone used the external JTAG port on the Cyclone III dev kit? I've tried an EthernetBlaster and USB-Blaster using Number 4 in Table 2-7 of the CIII Dev kit Reference Manual (i.e....
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Altera_Forum
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15 years ago

Hi All,

Some follow-up (for a change!!).

There seems to be a coupling issue between the JTAG port and the HSMC D/A & A/D card that comes with this kit, but ONLY when that HSMC card is connected to HSMC Port A. Interestingly, this HSMC card does not appear to use the JTAG (according to the schematics), but the HSMC ports do have pins for JTAG. No problem found when using HSMC Port B, or any other HSMC card I have connected to Port A (Debug header, termination header, Nial's Stewart's General Purpose Interface Board V2.0).

Altera have been able to repeat the problem with the EthernetBlaster and USB-Blaster. A work-around I've found is to make a very short (50mm) 10 way IDC ribbon cable, in place of the original 200mm flex PCB.

Regards,

Robert.