What are the different package options for FT51A?

44 pin LQFP and 48 pin WQFN = Full spec (1 x USB upstream, 1 x USB downstream, 16 digital pins, 16 analog pins)

28 pin SSOP and 32 pin WQFN = Reduced spec (1 x USB upstream, reduced digital and analog pins)

Note: Firmware can change the pin mapping through IOMUX programming.