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FPC401: the difference between the FPC401 and FPC402

Part Number: FPC401
Other Parts Discussed in Thread: FPC402,

Hi team,

We want to check the difference between the FPC401 and FPC402. Thanks.

How to deal with the unused GPIO,SPI_LED_CLK, ports(ports related pins as ABS, TXFAULT)? Whether we can float? Thanks.