Cpu Vcc Select (Jp2); Cpu Clock Select (Jp9, Jp10) - Aaeon SBC-455 Product Manual

CPU Vcc select (JP2)

JP2 must be set to match the CPU type. The chart below shows the
proper jumper settings for their respective V .
cc
5.0 V 3.3 V 3.45 V (default)
4.0 V 3.6 V

CPU clock select (JP9, JP10)

JP9 and JP10 are used to synchronize the CPU clock with the CPU
type. Set the CPU clock according to the base CPU speed.
25 MHz 33 MHz (default) 40 MHz 50MHz
16 SBC-455 User's Manual