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USB Superspeed Peripherals

JuIn_1625121
Valued Contributor II

I recognize that it is normal that the input voltage to the RESET# pin is High when FX3 is operating.

However, due to other circuits, the input voltage may fluctuate between 1.5V and 1.9V when FX3 is operating at the customer's board now.

Is there any problems in this case?

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Anonymous
Not applicable

Hi,

Please refer to Table 8 (DC Specifications) in FX3 Datasheet. If your VIO1 is 3.3V, then Vioh ranges fromm 0.625 * VIO1 to VIO1 + 0.3, that is 2V to 3.6V

So the fluctuations in your board might cause problem. We recommend you to rework your board and provide required isolation.

Regards,

- Madhu Sudhan

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