Mediatek Labs LinkIt 2523 HDK User Manual page 12

4.2.7. Serial flash I/O power source
Table 5 provides two different settings for powering up the serial flash.
Connect the jumper J1112 pins to set the power source from VIO18, as shown
below.
Connect the jumper J1105 pins to set the power source from VSF, as shown below.
4.2.8. Analog I/O power selection
Table 6 provides two different settings for powering up the analog I/O.
Connect the jumper J1114 pins to set the power source from VA28, as shown below.
Connect the jumper J1114 pins to set the power source from VIO28, as shown below.
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LinkIt 2523 HDK User's Manual
Table 5. Serial flash I/O power source selection jumper
Table 6. Analog I/O power source selection jumper
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