Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

In-System Programming with Cyclone III

Hello, I have a custom board that uses the Cyclone III (EP3C40 - 240 pin) FPGA. The board has two headers for connecting to the ByteBlaster II. One of the headers is used for JTAG configuration...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

How do you set the MSEL pins to 0 or 1? They need to be hard wired to ground or 2.5V, not controlled through a register or a microcontroller, as the FPGA could get a wrong reading on the MSEL pins when it starts up.

Did you try to see with a scope if the FPGA is trying to read the flash when it starts? What are the levels on the nSTATUS, nCONFIG and CONF_DONE signals?