C8051F340-GQR Datasheet, PDF (71/276 Pages) Silicon Laboratories – Full Speed USB Flash MCU Family

C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
From VBUS
VBUS
REGIN
VBUS Sense
5 V In
Voltage Regulator (REG0)
From 3 V
Power Net
VDD
3 V Out
Device
Power Net
Figure 8.3. REG0 Configuration: USB Self-Powered, Regulator Disabled
From 5 V
Power Net
To 3 V
Power Net
VBUS
REGIN
VDD
VBUS Sense
5 V In
Voltage Regulator (REG0)
3 V Out
Device
Power Net
Figure 8.4. REG0 Configuration: No USB Connection
Rev. 1.3
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