This indicates a firmware mismatch. You likely flashed a firmware file meant for a different internal MCU revision (such as flashing a DSO-TC3 file to a TC2, or mixing up internal board variants). Re-download the correct legacy version and flash it blindly or via forced bootloader mode.
: Most FNIRSI flashing tools are built strictly for Windows environments.
Before beginning the update, gather the necessary equipment to ensure a smooth flashing process:
: This happens if the wrong firmware version (such as firmware meant for the newer TC3 model) was flashed. Force the device back into bootloader mode by holding the power combo, or disconnect the internal battery for 10 seconds, then attempt to re-flash the correct, verified DSO-TC2 file. fnirsi dso-tc2 firmware
The device appears as a USB drive; you simply drag and drop the new firmware file. ⚠️ Common Firmware Issues
, making it suitable for low-frequency hobbyist applications but not high-speed digital analysis.
: The MCU has no Read-Out Protection (RDP) enabled (RDP level 0). This allows full read via STM32CubeProgrammer . This indicates a firmware mismatch
If you run into issues during the upgrade, try these common solutions:
. Ensure you have a Micro USB or Type-C data transfer cable (depending on your specific hardware revision). Connection
A: The user manual is available for download from the official FNIRSI website, as well as from many third-party manuals sites. For the most up-to-date version, always check the manufacturer's official support page first. : Most FNIRSI flashing tools are built strictly
DSO-TC2 V1.2 CALIB_DATA TP_LOW=150 TP_HIGH=2750 Component Tester Mode ADC overflow
Enhancements to the internal look-up tables improve ESR (Equivalent Series Resistance) and capacitance accuracy.