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Altera_Forum
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12 years ago

JTAG Configuration - conf_done pin always low, even pull-up

After Board power-on, the conf_done pin which is also 10k pulled-up to 3.2V, but the pin is stick to low. the pull-up is not working for this pin. No short to GND. After power-on device, 16...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

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The msel0123 ("0000") is set for only Jtag configuration. is it correct?

The device is 324pin BGA Package and No Expsoed pad.

Does BGA Soldering fail? or still configurations fail?.

The problem is that the pin cannot pull-up with external circuits.

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1. JTAG configuration dosen't need to be set anything.

2. config_done doesn't go high is not because of external circuit.

3. How many devices in your jtag chain?