Renesas RL78/G1D, User Manual

Page: 15 / 30

RL78/G1D Evaluation Board
R30UZ0048EJ0130 Rev.1.30 Page
11
of
22
Dec. 1, 2015
6. Power Supply
6.1 Power Line System
The evaluation board operates on the power supply selected by using the slide switches: AC adapter input (DC 5 V)
from the jack (J1), battery box input (DC plug 3 V), USB VBUS input (5 V), or E1 input (3.3 V; when the E1
emulator is connected). Do not select 5 V when connection is established by E1 emulator software.
When the AC adapter input (DC 5 V) or USB VBUS input (5 V) is selected, 3.0 V is generated by the regulator.
Figure 6-1 shows the power line system.
Figure 6-1 Power Line System
DC jack
1.8 V to 5.0 V
Power supply for
RL78/G1D module
1.8 V to 3.6 V
Power supply for
peripherals
1.8 V to 3.6 V
3.3 V
USB VBUS
E1
5.0 V
3.3 V
Battery box
Switch between
DC and VBUS
Regulator
SW11
Fixed to 3.3 V
Switch between battery
and other source
Switch between
E1 and other
source
SW8
SW12
SW7
DC 5.0 V