Silicon Laboratories C8051F347 - Manual (Page 71)

Rev. 1.3 71
C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
Figure 8.3. REG0 Configuration: USB Self-Powered, Regulator Disabled
Figure 8.4. REG0 Configuration: No USB Connection
Voltage Regulator (REG0) 5 V In
3 V Out
VBUS Sense
REGIN
VBUS
From 3 V
Power Net
Device
Power Net
VDD
From VBUS
Voltage Regulator (REG0) 5 V In
3 V Out
VBUS Sense
REGIN
VBUS
To 3 V
Power Net
Device
Power Net
VDD
From 5 V
Power Net