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Altera_Forum's avatar
Altera_Forum
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14 years ago

Detect presence of USB Blaster local to target?

Hi, I would like to have my target detect when a JTAG header is connected so I can disable the default JTAG controller outputs (using an output enable). The header will only be used during produc...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

USB Blaster output pins are initially tristated so connection of the USB Blaster isn't detectable by a level change. The only simple method I can think of is to use one of the two ground pins as sense.