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- When the USB cable is unplugged, any voltage present on the I/O pins will back-feed the FTDI CHIP through its protection DIODES and partially power it. This is an unknown state. Damage will not occur; however, the RESET# input will need driven with a low Pulse in order to recover. To avoid this scenario, ensure that the I/O voltages are kept at zero while the USB cable is not connected, or use external buffers that allow signals without power present.
- Published：2024-04-16
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