If ispVM prompt error nessage like the following:
"SVP Template Processor Error: Data Shift Verification Failed."
"Failed in Function DIRECT_FLASH_ERASE "
Please check the following debug step in sequential order:
- Scan the device by clicking on the "Scan" button or pressing F2. IspVM should be able to scan a Lattice device that it's connected to, and display the device ID. If that passes , it means that there probably aren't electrical connection problems with TDI/TDO/TCK/TMS
- Check to see that VCCAUX is at the correct voltage level; either 2.5V or 3.3V, depending on the part. VCCAUX powers the Flash on the chip, which might explain why the scan works, but erase doesn't.
- Unplug the TRST/INITN/PROGRAMN pins from the JTAG connector. They are not necessary for JTAG programming.
- Check the TRST/INITN/PROGRAMN pins of the part to ensure that they're floating; there should be no pull ups or pull downs.