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is a multi-functional USB bus conversion chip manufactured by WCH (Nanjing QinHeng Corp)
Unlike a USB drive, this device requires specific software:
| Mode | Function | Common Use | |------|----------|-------------| | | Serial communication (3.3V/5V) | Arduino debugging, console cables for routers | | USB to SPI | Serial Peripheral Interface | Flashing BIOS chips, EEPROMs (e.g., 25 series) | | USB to I2C | Inter-Integrated Circuit | Reading/writing I2C EEPROMs, sensors | | USB to Parallel | Printer port emulation | Legacy hardware control |
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