RH850/U2A 144pin
8. Jumper Configuration Examples
R20UT5089ED0101 Rev.1.01
Page 35 of 56
July 08, 2022
8.2.3
Stand-Alone Operation with Single External Power Supply 3.3 V: Minimum Configuration 1
This example enables to operate the board with only the 3.3 V external power supply.
Since no 5 V voltage is available, all I/O ports can only use 3.3 V.
•
CN8: GND connection
•
CN9: not connected, no 5.0 V
•
CN10: 3.3V
−
jumpers JP1, JP6 to JP8, JP10 to JP13, JP33, JP35 and JP37 are set to 3.3 V position [2-3]
•
CN11: not connected, no IN_1v12
−
JP16[2-1]: use reg_vcc_VDD from on-board voltage regulator for supply of VDD voltage
−
VDD from reg_vcc_VDD (JP23[2-1]) or from SVR_OUTPUT (JP23[2-3]) from on-chip Switching Voltage
Regulator
Refer to
3.3 Device Core Voltage (VDD) Selection
for further details about VDD voltage.
Figure 8.1 Stand-alone operation with single external power supply 3.3V
