ambiq micro Apollo4 Blue EVB Quick Start Manual - Page 15

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Apollo4 EVB Quick Start Guide

Figure 8 shows the USB load switch circuit producing the voltage supplied to VDDUSB33 and

VDDUSB0_9 through solder-bridges SB13 and SB11, respectively. These solder bridges are shorted by

default.

Figure 8. Apollo4 EVB USB Load Switch Circuit

Similarly, Figure 9 shows the load switch circuit producing the voltage supplied to the MIPI DPHY VDD18

supply through solder-bridge SB9. This solder bridge is also shorted by default.

Figure 9. Apollo4 EVB VDD18/MIPI Load Switch Circuit

QS-A4-4p1

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