A recovery boot (aka TE USB FX2 firmware recovery) is a multi-step boot operation:
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TE USB FX2 module is inserted in the USB port of the computer (aka plugged in, aka attached);
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Cypress firmware update tools (Cypress USB Console recovery boot,Cypress USB Control Center recovery boot) and OpenFutNet (OpenFutNet recovery boot) can read and write the EEPROM.
For example using CyControl (Cypress USB Control Center).