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16 SBC-455 User's 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
.
CPU Vcc select (JP2)
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.
CPU clock select (JP9, JP10)
25 MHz 33 MHz (default) 40 MHz 50MHz