DFU CLEAR_STORAGE

Role

Clear the whole NVM (SPI flash).

Important disclaimer

This instruction erases everything from the NVM, including the Authenticity stamp that proves that the hardware has been genuinely manufactured or approved by SpringCard. In other words, after calling this instruction, all the device’s authenticity checks will fail and normal operation will stop. Restoring the earlier state is not possible outside of SpringCard factories

INVOKING THIS INSTRUCTION MAKES THE DEVICE USELESS AND VOIDS THE WARRANTY.

In other wordsand to make it perfectly clear, never invoke this instruction.

Command

Field Value
CLA 5D (DFU)
INS 09
Data Constant value, disclosed by SpringCard under NDA only.

Response

Byte Name Description
0 STAtus 00 (SUCCESS) if execution is OK; see List of STAtus for error codes