
User Manual - Rev1.0.2
M13design - 16 Dec. 21
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3.1.4
POWER SUPPLY
The
M13-RA6M3-EK
has 2 sources for its power supply. The Primary source is from the +5VDC/500mA
of the J-Link OB USB connector CN5 as shown in
. The Secondary source is provided through
the 2.10mm Power Jack connector CN15 and is strictly limited to a +5VDC power supply. Even though
the power source is protected by diodes (D5 and D6) be extra cautious as to not provide the board’s
power from the Primary and the Secondary sources simultaneously.
Figure 8. RA6M3 Power Supply Overview
Two DC/DC regulators are used to generate all the required power rails needed on the board. The 1V8
rail is exclusively used by the Audio Codec as shown by the
RA6M3
CN5
CN15
5V to 1V8
AVCC0
J-LINK OB
POWER JACK
5V to 3V3
VREFH
VREFH0
VCC
VBAT
VCC_USB
VCC_USBHS
AVCC_USBHS
AUDIO CODEC
AVDD
PVDD
1V8D
3V3D
26
5
32
23
26
34
48
18
24...171
158
154
155
D5
PMEG3020EP
D6
PMEG3020EP
5V_IN
AVCC0
3V3D
1V8D