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DS90UB954-Q1: The voltage will be pull down.

Part Number: DS90UB954-Q1

Dears:

Customer use DS90UB954, and CPU is GEOSEMI' GW5200.

Testing the voltage of GW5200 ISP's GPIO is 1.8V, however, when the GPIO is connecting with UB954, the voltage will be 1.16V.

Pls. give some advice?