Forum Discussion
Altera_Forum
Honored Contributor
11 years agoAssuming you have nothing connected to your JTAG header TMS and TDI should be high courtesy of the pull-ups you mentioned.
CONF_DONE remains low until the FPGA is configured. The fact that nSTATUS is low implies that nCONFIG is being driven low - which it needs to be prior to programming in Passive Serial configuration. Otherwise it too should be pulled/driven high. Further info in configuration and remote system upgrades in cyclone iv devices (http://www.altera.com/literature/hb/cyclone-iv/cyiv-51008.pdf). Look at Figure 8-16 on page 8-36. If you need further help let us know which dev board you're using... Happy New Year, Alex