Peripheral Circuit Power Supply (Vdd(3.3[V]) Or Vcc(5.0[V])); Reset Circuit - Renesas RAJ306101 User Manual

RAJ306101 RSSK User's Manual
4.1.3 Peripheral Circuit Power Supply (VDD(3.3[V]) or VCC5V(5.0[V]))
The power supply for the peripheral circuits on the Evaluation Board can be selected from VDD pin (3.3[V]) or
VCC5V pin (5.0[V]) of the smart gate driver by the 0[Ω] resistors connection. The power supply for some
peripheral circuits (Current Sense (External), Halls, LEDs, RMWB(ICS)) can be also selected from U301
(5.0[V]) or U302 (3.3[V]) by JP304 and 0[Ω] resistors (R335, R363, R364, R365, R366, R367, R368, R369). In
the default settings of the Evaluation Board, R97 and R98 are not mounted, so the VDD pin (3.3[V]) is
selected, and 2-3 of JP304 are shorted to select U302 (3.3[V]). When selecting the VCC5V pin (5.0[V]) as the
power supply for the peripheral circuits, mount 0[Ω] resistors to R97 and R98 shown in Figure 4-2. Also,
connect 1-2 of JP304 to select U301 (5.0[V]).
The output voltage (V
DD
bleeder ratio (R4 / R5) of the external feedback resistors shown in Figure 4-2. These resistances on the
Evaluation Board are R4 = 160[kΩ] and R5 = 91[kΩ], so the output voltage of the VDD pin is 3.310[V]. For
details of VDD pin and VCC5V pin, refer to 5.1.2 in the "RAJ306101 User's Manual: Hardware
(R18UZ0081EJ)".
When changing the Peripheral Circuit Power Supply on the Evaluation Board, it is necessary to change the
operating voltage of the E2OB circuit on the Evaluation Board as well. The voltage settings of the E2OB
circuit on the Evaluation Board can be changed by changing the JP502 settings. To use 5.0[V], connect 1-2
of JP502 and to use 3.3[V], connect 2-3 of JP502. The power supply settings for the E2OB circuit on the
Evaluation Board with JP502 are shown in Figure 4-2.
U301
(5.0[V])
JP304
U302
U301
C19 C18
R97 R98
R4 R5
R99
MVDD
(VDD 3.3[V] select)
HALL
(EX_LDO select)
R369
MVDD
EX_LDO
R368
0
：Short (0[Ω] resistor or solder)
： Mounted resistor
： Mounted capacitor
Figure 4-2 Peripheral Circuit Power Supply Components for Evaluation Board
4.2

Reset Circuit

The Evaluation Board has a reset circuit for power-on reset and external reset of the MCU. To apply an
external reset to the MCU, press the reset switch (S401).
R12UZ0129EJ0100 Rev.1.00
Nov 1, 2023
) can be fine-tuned within the recommended operating conditions by adjusting the
1 2 3
U302
(3.3[V])
EX_LDO (3.3[V] select)
MVDD
R335
R363
Current Sense (MVDD select)
(VDD(3.3[V]) or VCC5V(5.0[V]))
E2OB Power
(UVCC)
JP502
3
3.3[V]
E2OB Power
(UVCC)
EX_LDO
Chapter 4. Peripheral Circuits
5.0[V]
2 2
1 3
From
5.0[V]
USB BUS
POWER
JP501
1
MVDD
2
RMBK(ICS) (EX_LDO select)
R366 R367
EX_LDO MVDD
R365
MVDD
EX_LDO R364
LED (EX_LDO select)
Page 34 of 55
JP503
1
FROM
EX_LDO