System Configuration; Vin Power Source; Power Sources; Table 2-3 Vin Power Source - Nuvoton NuMicro M252 Series User Manual

System Configuration

2.5.1

VIN Power Source

Table 2-3 presents the Vin power source.
Connector
NU1 pin8
2.5.2 5 V Power Sources
Table 2-4 presents the 5 V power sources.
Connector
ICEJ3 USB_HS_VBUS
J2
NU1 pin5
2.5.3 3.3 V Power Sources
Table 2-5 presents the 3.3 V power sources.
Voltage Regulator
ICEUP1 USB_HS_VBUS
UP1
UP1
Aug. 02, 2019
Net Name in
Schematic
Board external power source, with voltage range from 7
V to 12 V. The voltage regulator UP2 converts the NU1
NU1_VIN
pin8 input voltage to 5 V and supplies it to NuMaker-
M252SD.

Table 2-3 Vin Power Source

Net Name in
Schematic
ICE USB connector supplies 5 V power from PC to
M252 platform and Nu-Link2-Me.
USB connector on NuMaker-M252SD supplies 5 V
USB_VBUS
power from PC to M252 platform and Nu-Link2-Me.
ICEJ3, J2 or NU1 pin8 supplies 5 V power to NU1 pin5.
NU1 pin5 supplies 5 V power to target chip or Arduino
adapter board.
NU1_5VCC
Note: M252 operating voltage range is from 1.8 V to 5.5
V. Do not switch SW2.1(NU1 5VCC) to ON.

Table 2-4 5V Power Sources

5V Source
ICEUP1 converts USB_HS_VBUS to 3.3 V and supplies
3.3V to M252 platform or ICE chip.
UP1 converts USB_VBUS to 3.3 V and supplies 3.3 V
to M252 platform.
USB_VBUS
Note: SW2.2(NU1 3VCC) should be switched to ON.
UP1 converts NU1_5VCC to 3.3 V and supplies 3.3 V to
M252 platform.
NU1_5VCC
Note: SW2.2(NU1 3VCC) should be switched to ON.

Table 2-5 3.3 V Power Sources

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NuMaker-M252SD
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