Nuvoton NuMaker-M031SD User manual

NuMaker-M031SD
Feb. 20, 2019 Page 1of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
ARM®Cortex®-M
32-bit Microcontroller
NuMaker-M031SD
User Manual
NuMicro®M031 Series
The information described in this document is the exclusive intellectual property of
Nuvoton Technology Corporation and shall not be reproduced without permission from Nuvoton.
Nuvoton is providing this document only for reference purposes of NuMicro microcontroller based system
design. Nuvoton assumes no responsibility for errors or omissions.
All data and specifications are subject to change without notice.
For additional information or questions, please contact: Nuvoton Technology Corporation.
www.nuvoton.com

NuMaker-M031SD
Feb. 20, 2019 Page 2of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
Table of Contents
1Overview.............................................................................................6
NuMaker-M031SD Features......................................................................... 61.1
2NuMaker-M031SD Overview.....................................................................8
Front View............................................................................................... 82.1
Rear View............................................................................................... 92.2
Arduino UNO Compatible Extension Connectors................................................102.3
Pin Assignment for Extension Connectors........................................................12
2.4
System Configuration ................................................................................152.5
2.5.1 VIN Power Source............................................................................................ 15
2.5.2 5 V Power Sources ........................................................................................... 15
2.5.3 3.3 V Power Sources......................................................................................... 15
2.5.4 1.8V Power Sources ......................................................................................... 16
2.5.5 Power Connectors............................................................................................ 16
2.5.6 USB Connectors .............................................................................................. 16
2.5.7 Power Switches............................................................................................... 16
2.5.8 Power Supply Models........................................................................................ 17
2.5.9 External Reference Voltage Connector ................................................................... 20
2.5.10 Ammeter Connector.......................................................................................... 20
2.5.11 Extension Connectors........................................................................................ 20
2.5.12 Push-Buttons .................................................................................................. 21
2.5.13 LEDs............................................................................................................ 21
Nu-Link2-Me...........................................................................................212.6
PCB Placement .......................................................................................222.7
3Quick Start ........................................................................................ 23
Toolchains Supporting ...............................................................................233.1
Nuvoton Nu-Link Driver Installation................................................................233.2
BSP Firmware Download............................................................................253.3
Hardware Setup.......................................................................................253.4
Find the Example Project............................................................................273.5
Execute the Project under Toolchains.............................................................273.6
3.6.1 Keil MDK ....................................................................................................... 27
3.6.2 IAR EWARM................................................................................................... 31
3.6.3 NuEclipse ...................................................................................................... 32

NuMaker-M031SD
Feb. 20, 2019 Page 3of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
4NuMaker-M031SD Schematics................................................................ 33
Nu-Link2-Me...........................................................................................334.1
M031 platform.........................................................................................344.2
Extension Connector.................................................................................354.3
5REVISION HISTORY............................................................................ 36

NuMaker-M031SD
Feb. 20, 2019 Page 4of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
List of Figures
Figure 1-1 NuMaker-M031SD Board ............................................................................................... 6
Figure 2-1 Front View of NuMaker-M031SD.................................................................................... 8
Figure 2-2 Rear View of NuMaker-M031SD.................................................................................... 9
Figure 2-3 Arduino UNO Compatible Extension Connectors......................................................... 10
Figure 2-4 M031SD2AE Extension Connectors............................................................................. 12
Figure 2-5 External Power Supply Sources on Nu-Link2-Me ........................................................ 17
Figure 2-6 External Power Supply Sources on M031 platform...................................................... 18
Figure 2-6 External Power Supply Sources on M031 platform...................................................... 19
Figure 2-7 Wiring between Ammeter Connector and Ammeter..................................................... 20
Figure 2-8 Front Placement ........................................................................................................... 22
Figure 2-9 Rear Placement............................................................................................................ 22
Figure 3-1 Nu-Link USB Driver Installation Setup.......................................................................... 23
Figure 3-2 Nu-Link USB Driver Installation.................................................................................... 24
Figure 3-3 Open VCOM Function .................................................................................................. 25
Figure 3-4 ICE USB Connector...................................................................................................... 25
Figure 3-5 Device Manger.............................................................................................................. 26
Figure 3-6 PuTTY Session Setting................................................................................................. 26
Figure 3-7 Template Project Folder Path....................................................................................... 27
Figure 3-8 Warning Message of “Device not found” ...................................................................... 27
Figure 3-9 Project File Migrate to Version 5 Format...................................................................... 28
Figure 3-10 Debugger Setting in Options Window......................................................................... 28
Figure 3-11 Programming Setting in Options Window................................................................... 29
Figure 3-12 Compile and Download the Project............................................................................ 29
Figure 3-13 Keil MDK Debug Mode............................................................................................... 30
Figure 3-14 Debug Message on Serial Port Terminal Windows.................................................... 30
Figure 3-15 IAR EWARM Window................................................................................................. 31
Figure 3-16 Compile and Download the Project............................................................................ 31
Figure 3-17 IAR EWARM Debug Mode ......................................................................................... 32
Figure 3-18 Debug Message on Serial Port Terminal Windows.................................................... 32
Figure 4-1 Nu-Link2-Me Circuit...................................................................................................... 33
Figure 4-2 M031 platform Circuit.................................................................................................... 34
Figure 4-3 Extension Connectors Circuit ....................................................................................... 35

NuMaker-M031SD
Feb. 20, 2019 Page 5of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
List of Tables
Table 2-1 Arduino UNO Extension Connectors and M031SD2AE Mapping GPIO List................. 11
Table 2-2 M031SD2AE Full-pin Extension Connectors and GPIO Function List .......................... 14
Table 2-3 Vin Power Source.......................................................................................................... 15
Table 2-4 5V Power Sources......................................................................................................... 15
Table 2-5 3.3 V Power Sources..................................................................................................... 15
Table 2-6 1.8V Power Sources...................................................................................................... 16
Table 2-7 Power Connectors ......................................................................................................... 16
Table 2-8 USB Connectors ............................................................................................................ 16
Table 2-9 Power Switches ............................................................................................................. 16
Table 2-10 Supply External Power through Nu-Link2-Me ............................................................. 17
Table 2-11 Supply External Power for M031 platform................................................................... 19
Table 2-12 External Reference Voltage Connector....................................................................... 20
Table 2-13 Ammeter Connector..................................................................................................... 20
Table 2-14 Extension Connectors.................................................................................................. 20
Table 2-15 Push-Buttons ............................................................................................................... 21
Table 2-16 LEDs ............................................................................................................................ 21
Table 2-17 VCOM Function of Nu-Link2-Me.................................................................................. 21

NuMaker-M031SD
Feb. 20, 2019 Page 6of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
1 OVERVIEW
This user manual is aimed to give users a fast introduction to the use of NuMaker-M031SD board.
The NuMaker-M031SD consists of two parts, a M031 platform and an on-board Nu-Link2-Me
debugger and programmer. The NuMaker-M031SD allows users to quickly develop and easily
program and debug application.
The NuMaker-M031SD offers M031SD2AE full pins extension connectors, Arduino UNO compatible
extension connectors and diversified power supply option. It is an easy-to-develop platform for user to
expand the functionality and build the applications. The NuMaker-M031SD also provides an ammeter
connector, allows user to monitor the microcontroller’s power consumption during development.
The Nu-Link2-Me is a debugger and programmer that supports on-line programming and debugging
through SWD interface. The on-board 16 Mbit SPI Flash allows it able to off-line programming the
target microcontroller. Nu-Link2-Me provides virtual COM port (VCOM) function to print out messages
on PC. Nu-Link2-Me can be separated from NuMaker-M031SD, allowing user to use as a mass
production programming tool.
Figure 1-1 NuMaker-M031SD Board
NuMaker-M031SD Features1.1
NuMicro®M031SD2AE used as main microcontroller with function downward compatible
with:
M031SD2AE
M031LD2AE
M031TD2AE
M031SC2AE
M031LC2AE
M031SD2AE full pins extension connectors
Arduino UNO compatible extension connectors
Ammeter connector for measuring the microcontroller’s power consumption
Fixable board power supply:
External VDD power connector

NuMaker-M031SD
Feb. 20, 2019 Page 7of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
Arduino UNO compatible extension connector Vin
USB power connector on M031 platform
ICE USB connector on Nu-Link2-Me
On-board Nu-Link2-Me debugger and programmer:
Debug through SWD interface
On-line/off-line programming
Virtual COM port function

NuMaker-M031SD
Feb. 20, 2019 Page 8of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
2 NUMAKER-M031SD OVERVIEW
Front View2.1
ICE USB Connector
VCOM Switch
Reset Button
ICE Status LED
Off-line Program Button
USB Power Connector
Power LED
PB14 LED
VDD Switch
Target Chip: M031SD2AE Target Chip Extension Connector
Arduino UNO Compatible Extension Connector
External VDD Connector
Nu-Link2-Me
Ammeter
ICE Chip: M48SSIDAE
External VSS Connector
M031 Platform
External VREF Connector
Figure 2-1 Front View of NuMaker-M031SD
Figure 2-1 shows the main components and connectors from the front side of NuMaker-M031SD. The
following lists components and connectors from the front view:
Target Chip: M031SD2AE(U1)
USB Power Connector(J2)
Arduino UNO Compatible Extension Connectors (NU1, NU2, NU3, NU4)
M031 Extension Connectors (JP3, JP4, JP5 and JP6)
External VDD Power Connector(JP1)
External VSS Power Connector(JP2)
External VREF Connector(VREF1)
VDD Switch(SW2)
Ammeter Connector(AMMETER)
Reset Button(SW1)
Power LED and PB14 LED(LEDG1 and LEDR1)
Nu-Link2-Me
VCOM Switch
ICE Chip: M48SSIDAE(ICEU2)
ICE USB Connector(ICEJ3)
ICE Status LED(ICES0,ICES1, ICES2, ICES3)
Off-line Program Button(ICESW1)

NuMaker-M031SD
Feb. 20, 2019 Page 9of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
Rear View2.2
Figure 2-2 shows the main components and connectors from the rear side of NuMaker-M031SD.
The following lists components and connectors from the rear view:
Nu-Link2-Me
MCUVCC Power Switch (ICEJPR1)
ICEVCC Power Switch (ICEJPR2)
ICEVCC Power Switch
MCUVCC Power Switch
Figure 2-2 Rear View of NuMaker-M031SD

NuMaker-M031SD
Feb. 20, 2019 Page 10 of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
Arduino UNO Compatible Extension Connectors2.3
Figure 2-3 shows the Arduino UNO compatible extension connectors.
MISO CLK RESET SS
PA.9 PA.11 nRESET PA.8
USCI0_DAT1 USCI0_CLK
5V MOSI GND -
VDD PA.10 VSS PB.15
USCI0_DAT0
PWM0_CH0 PA.5 D8
PWM0_CH1 PA.4 D9
SPI0_SS PWM0_CH2 PA.3 D10
SPI0_MOSI PWM0_CH5 PA.0 D11
SPI0_MISO PWM0_CH4 PA.1 D12
SPI0_CLK PWM0_CH3 PA.2 D13
VSS VSS
VREF VREF
I2C0_SDA PC.0 SDA
I2C0_SCL PC.1 SCL
UART1_RXD PWM0_CH3 PB.2 D0
UART1_TXD PWM0_CH2 PB.3 D1
I2C1_SDA PWM1_CH1 PC.4 D2
I2C1_SCL PWM1_CH0 PC.5 D3
PWM1_CH2 PC.3 D4
PWM1_CH3 PC.2 D5
PWM1_CH4 PA.7 D6
PWM1_CH5 PA.6 D7
VIN
VSS
VSS
5V
3V
RST
IOREF VDD
NC
A5 PB.1 ADC0_CH1 I2C1_SCL UART2_TXD
A4 PB.0 ADC0_CH0 I2C1_SDA UART2_RXD
A3 PB.4 ADC0_CH4
A2 PB.5 ADC0_CH5
A1 PB.6 ADC0_CH6
A0 PB.7 ADC0_CH7
Figure 2-3 Arduino UNO Compatible Extension Connectors

NuMaker-M031SD
Feb. 20, 2019 Page 11 of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
Header
NuMaker-M031SD
Header
NuMaker-M031SD
Compatible to
Arduino UNO
GPIO Pin of M031
Compatible to
Arduino UNO
GPIO Pin of M031
N
U
5
NU5.1
MISO
PA.9
N
U
5
NU5.2
5V
VDD
NU5.3
CLK
PA.11
NU5.4
MOSI
PA.10
NU5.5
RESET
nRESET
NU5.6
GND
VSS
NU5.7
-
PA.8
NU5.8
SS
PB.15
Header
NuMaker-M031SD
Header
NuMaker-M031SD
Compatible to
Arduino UNO
GPIO Pin of M031
Compatible to
Arduino UNO
GPIO Pin of M031
N
U
4
NU3.1
D0
PB.2
N
U
2
NU2.6
A5
PB.1
NU3.2
D1
PB.3
NU2.5
A4
PB.0
NU3.3
D2
PC.4
NU2.4
A3
PB.4
NU3.4
D3
PC.5
NU2.3
A2
PB.5
NU3.5
D4
PC.3
NU2.2
A1
PB.6
NU3.6
D5
PC.2
NU2.1
A0
PB.7
NU3.7
D6
PA.7
N
U
1
NU1.8
VIN
-
NU3.8
D7
PA.6
NU1.7
VSS
N
U
3
NU4.1
D8
PA.5
NU1.6
VSS
NU4.2
D9
PA.4
NU1.5
5V
NU4.3
D10
PA.3
NU1.4
3V
NU4.4
D11
PA.0
NU1.3
RST
nRESET
NU4.5
D12
PA.1
NU1.2
IOREF
VDD
NU4.6
D13
PA.2
NU1.1
NC
-
NU4.7
VSS
VSS
NU4.8
VREF
VREF
NU4.9
SDA
PC.0
NU4.10
SCL
PC.1
Table 2-1 Arduino UNO Extension Connectors and M031SD2AE Mapping GPIO List

NuMaker-M031SD
Feb. 20, 2019 Page 12 of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
Pin Assignment for Extension Connectors2.4
The NuMaker-M031SD provides the M031SD2AE target chip onboard and full pins extension
connectors (JP3, JP4, JP5 and JP6). The Figure 2-4 shows the M031SD2AE extension connectors.
JP3
Pin1 ~ Pin16
JP6
Pin49 ~ Pin64
JP5 Pin17 ~ Pin32
JP4 Pin33 ~ Pin48
Figure 2-4 M031SD2AE Extension Connectors

NuMaker-M031SD
Feb. 20, 2019 Page 13 of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
Header
M031SD2AE
Pin No.
Function
JP3
JP3.1
JP3.2
1
PB.6/ADC0_CH6/UART1_RXD/PWM1_BRAKE1/PWM1_CH5/INT4/ACMP1_O
JP3.3
JP3.4
2
PB.5/ADC0_CH5/ACMP1_N/I2C0_SCL/PWM0_CH0/UART2_TXD/TM0/INT0
JP3.5
JP3.6
3
PB.4/ADC0_CH4/ACMP1_P1/I2C0_SDA/PWM0_CH1/UART2_RXD/TM1/INT1
JP3.7
JP3.8
4
PB.3/ADC0_CH3/ACMP0_N/I2C1_SCL/UART1_TXD/PWM0_CH2/PWM0_BRAKE0/TM2
/INT2
JP3.9
JP3.10
5
PB.2/ADC0_CH2/ACMP0_P1/I2C1_SDA/UART1_RXD/PWM0_CH3/TM3/INT3
JP3.11
JP3.12
6
PB.1/ADC0_CH1/UART2_TXD/I2C1_SCL/PWM0_CH4/PWM1_CH4/PWM0_BRAKE0
JP3.13
JP3.14
7
PB.0/ADC0_CH0/UART2_RXD/SPI0_I2SMCLK/I2C1_SDA/PWM0_CH5/PWM1_CH5/PW
M0_BRAKE1
JP3.15
JP3.16
8
PA.11/ACMP0_P0/USCI0_CLK/TM0_EXT
JP3.17
JP3.18
9
PA.10/ACMP1_P0/USCI0_DAT0/TM1_EXT
JP3.19
JP3.20
10
PA.9/USCI0_DAT1/UART1_TXD/TM2_EXT
JP3.21
JP3.22
11
PA.8/USCI0_CTL1/UART1_RXD/TM3_EXT/INT4
JP3.23
JP3.24
12
PF.6/SPI0_MOSI
JP3.25
JP3.26
13
PF.14/PWM1_BRAKE0/PWM0_BRAKE0/PWM0_CH4/CLKO/TM3/INT5
JP3.27
JP3.28
14
PF.5/UART2_RXD/UART2_nCTS/PWM0_CH0/X32_IN/ADC0_ST
JP3.29
JP3.30
15
PF.4/UART2_TXD/UART2_nRTS/PWM0_CH1/X32_OUT
JP3.31
JP3.32
16
PF.3/UART0_TXD/I2C0_SCL/XT1_IN
JP5
JP5.1
JP5.2
17
PF.2/UART0_RXD/I2C0_SDA/XT1_OUT
JP5.3
JP5.4
18
PC.7/UART0_nCTS/PWM1_CH2/TM0/INT3
JP5.5
JP5.6
19
PC.6/UART0_nRTS/PWM1_CH3/TM1/INT2
JP5.7
JP5.8
20
PA.7/UART0_TXD/I2C1_SCL/PWM1_CH4/ACMP0_WLAT/TM2/INT1
JP5.9
JP5.10
21
PA.6/UART0_RXD/I2C1_SDA/PWM1_CH5/ACMP1_WLAT/TM3/INT0
JP5.11
JP5.12
22
VSS
JP5.13
JP5.14
23
VDD
JP5.15
JP5.16
24
PD.15/PWM0_CH5/TM3/INT1
JP5.17
JP5.18
25
PA.5/UART0_nCTS/UART0_TXD/I2C0_SCL/PWM0_CH0
JP5.19
JP5.20
26
PA.4/SPI0_I2SMCLK/UART0_nRTS/UART0_RXD/I2C0_SDA/PWM0_CH1
JP5.21
JP5.22
27
PA.3/SPI0_SS/UART1_TXD/I2C1_SCL/PWM0_CH2/CLKO/PWM1_BRAKE1
JP5.23
JP5.24
28
PA.2/SPI0_CLK/UART1_RXD/I2C1_SDA/PWM0_CH3
JP5.25
JP5.26
29
PA.1/SPI0_MISO/UART0_TXD/UART1_nCTS/PWM0_CH4
JP5.27
JP5.28
30
PA.0/SPI0_MOSI/UART0_RXD/UART1_nRTS/PWM0_CH5
JP5.29
JP5.30
31
PF.15/PWM0_BRAKE0/PWM0_CH1/TM2/CLKO/INT4
JP5.31
JP5.32
32
nRESET
JP4
JP4.1
JP4.2
33
PF.0/UART1_TXD/I2C1_SCL/UART0_TXD/ICE_DAT
JP4.3
JP4.4
34
PF.1/UART1_RXD/I2C1_SDA/UART0_RXD/ICE_CLK
JP4.5
JP4.6
35
PC.5/UART2_TXD/I2C1_SCL/PWM1_CH0

NuMaker-M031SD
Feb. 20, 2019 Page 14 of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
JP4.7
JP4.8
36
PC.4/UART2_RXD/I2C1_SDA/PWM1_CH1
JP4.9
JP4.10
37
PC.3/UART2_nRTS/PWM1_CH2
JP4.11
JP4.12
38
PC.2/UART2_nCTS/PWM1_CH3
JP4.13
JP4.14
39
PC.1/UART2_TXD/I2C0_SCL/PWM1_CH4/ACMP0_O
JP4.15
JP4.16
40
PC.0/UART2_RXD/I2C0_SDA/PWM1_CH5/ACMP1_O
JP4.17
JP4.18
41
PD.3/USCI0_CTL1/SPI0_SS/UART0_TXD
JP4.19
JP4.20
42
PD.2/USCI0_DAT1/SPI0_CLK/UART0_RXD
JP4.21
JP4.22
43
PD.1/USCI0_DAT0/SPI0_MISO
JP4.23
JP4.24
44
PD.0/USCI0_CLK/SPI0_MOSI/TM2
JP4.25
JP4.26
45
PA.12/I2C1_SCL
JP4.27
JP4.28
46
PA.13/I2C1_SDA
JP4.29
JP4.30
47
PA.14/UART0_TXD
JP4.15
JP4.32
48
PA.15/UART0_RXD
JP6
JP6.1
JP6.2
49
VSS
JP6.3
JP6.4
50
LDO_CAP
JP6.5
JP6.6
51
VDD
JP6.7
JP6.8
52
PC.14/SPI0_I2SMCLK/USCI0_CTL0/TM1
JP6.9
JP6.10
53
PB.15/ADC0_CH15/SPI0_SS/USCI0_CTL1/UART0_nCTS/PWM1_CH0/TM0_EXT/PWM
0_BRAKE1
JP6.11
JP6.12
54
PB.14/ADC0_CH14/SPI0_CLK/USCI0_DAT1/UART0_nRTS/PWM1_CH1/TM1_EXT/CLK
O
JP6.13
JP6.14
55
PB.13/ADC0_CH13/ACMP0_P3/ACMP1_P3/SPI0_MISO/USCI0_DAT0/UART0_TXD/PW
M1_CH2/TM2_EXT
JP6.15
JP6.16
56
PB.12/ADC0_CH12/ACMP0_P2/ACMP1_P2/SPI0_MOSI/USCI0_CLK/UART0_RXD/PW
M1_CH3/TM3_EXT
JP6.17
JP6.18
57
AVDD
JP6.19
JP6.20
58
VREF
JP6.21
JP6.22
59
AVSS
JP6.23
JP6.24
60
PB.11/ADC0_CH11/UART0_nCTS/I2C1_SCL/SPI0_I2SMCLK
JP6.25
JP6.26
61
PB.10/ADC0_CH10/UART0_nRTS/I2C1_SDA
JP6.27
JP6.28
62
PB.9/ADC0_CH9/UART0_TXD/UART1_nCTS
JP6.29
JP6.30
63
PB.8/ADC0_CH8/UART0_RXD/UART1_nRTS
JP6.15
JP6.32
64
PB.7/ADC0_CH7/UART1_TXD/PWM1_BRAKE0/PWM1_CH4/INT5/ACMP0_O
Table 2-2 M031SD2AE Full-pin Extension Connectors and GPIO Function List

NuMaker-M031SD
Feb. 20, 2019 Page 15 of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
System Configuration2.5
2.5.1 VIN Power Source
Table 2-3 presents the Vin power source.
Connector
Net Name in
Schematic
Comment
NU1 pin8
NU1_VIN
Board external power source, with voltage range from 7
V to 12 V. The voltage regulator UP2 converts the NU1
pin8 input voltage to 5 V and supplies it to NuMaker-
M031SD.
Table 2-3 Vin Power Source
2.5.2 5 V Power Sources
Table 2-4 presents the 5 V power sources.
Connector
Net Name in
Schematic
Comment
ICEJ3
USB_HS_VBUS
ICE USB connector supplies 5 V power from PC to
M031 platform and Nu-Link2-Me.
J2
USB_VBUS
USB connector on NuMaker-M031SD supplies 5 V
power from PC to M031 platform and Nu-Link2-Me.
NU1 pin5
NU1_5VCC
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.
Note: M031 operating voltage range is from 1.8 V to 3.6
V. Do not switch SW2.1(NU1 5VCC) to ON.
Table 2-4 5V Power Sources
2.5.3 3.3 V Power Sources
Table 2-5 presents the 3.3 V power sources.
Voltage Regulator
5V Source
Comment
ICEUP1
USB_HS_VBUS
ICEUP1 converts USB_HS_VBUS to 3.3 V and supplies
3.3V to M031 platform or ICE chip.
UP1
USB_VBUS
UP1 converts USB_VBUS to 3.3 V and supplies 3.3 V
to M031 platform.
Note: SW2.2(NU1 3VCC) should be switched to ON.
UP1
NU1_5VCC
UP1 converts NU1_5VCC to 3.3 V and supplies 3.3 V to
M031 platform.
Note: SW2.2(NU1 3VCC) should be switched to ON.
Table 2-5 3.3 V Power Sources

NuMaker-M031SD
Feb. 20, 2019 Page 16 of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
2.5.4 1.8V Power Sources
Table 2-6 presents the 1.8 V power source.
Voltage Regular
5V Source
Comment
ICEUP2
USB_HS_VBUS
ICEUP2 converts USB_HS_VBUS to 1.8V and supplies
1.8V to M031 platform or ICE chip.
Table 2-6 1.8V Power Sources
2.5.5 Power Connectors
Table 2-7 presents the power connectors.
Connector
Comment
JP1
VDD (1.8 V ~ 3.6 V) connector on the NuMaker-M031SD.
JP2
VSS connector on the NuMaker-M031SD.
Table 2-7 Power Connectors
2.5.6 USB Connectors
Table 2-8 presents the USB connectors.
Connector
Comment
ICEJ3
ICE USB connector on Nu-Link2-Me for power supply, debugging and
programming from PC.
J2
USB FS connector on NuMaker-M031SD for power supply.
Table 2-8 USB Connectors
2.5.7 Power Switches
Table 2-9 presents the power switches.
Switch
Comment
ICEJPR1
Configures the target chip operating voltage at 1.8 V / 3.3 V / 5 V.
ICEJPR2
Configures the ICE chip operating voltage at 1.8 V / 3.3 V.
SW2
Configures the target chip operating voltage at 3.3 V / 5 V.
Table 2-9 Power Switches

NuMaker-M031SD
Feb. 20, 2019 Page 17 of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
2.5.8 Power Supply Models
External Power Supply through Nu-Link2-Me to Target Chip2.5.8.1
The external power supply source on Nu-Link2-Me is shown in Figure 2-5.
ICE USB Connector (ICEJ3)
Nu-Link2-Me
Figure 2-5 External Power Supply Sources on Nu-Link2-Me
To use ICEJ3 as external power supply source with Nu-Link2-Me, please follow the below steps:
1. Solder the resistor on ICEJPR1 (MCUVCC) depends on the target chip operating voltage.
2. Solder the resistor on ICEJPR2 (ICEVCC) depends on the ICE chip operating voltage.
3. Switch the SW2 to OFF.
4. Connect the external power supply to JP1.
Table 2-10 presents all power models when supplies external power through Nu-Link2-Me. The Nu-
Link2-Me external power sources are highlighted in yellow.
Model
Target
Chip
Voltage
ICEJ3
ICEJPR1
(MCUVCC)
Selection [1]
ICEJPR2
(ICEVCC)
Selection [2]
ICE
Chip
Voltage
SW2
Selection
J2
Vin
JP1
1
1.8 V
Connect
to PC
1.8 V
1.8 V
1.8 V
Off
Ignore
Ignore
1.8 V
output
2
3.3 V
Connect
to PC
3.3 V (default)
3.3 V (default)
3.3 V
Off
Ignore
Ignore
3.3 V
output
3
5 V
Connect
to PC
5V
3.3 V (default)
3.3 V
Off
Ignore
Ignore
5 V
output
X: Unused.
Note:
1. 0 Ω should be soldered between ICEJPR1’s MCUVCC and 1.8 V / 3.3 V / 5 V.
2. 0 Ω should be soldered between ICEJPR2’s ICEVCC and 1.8 V / 3.3 V.
Table 2-10 Supply External Power through Nu-Link2-Me

NuMaker-M031SD
Feb. 20, 2019 Page 18 of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
External Power Supply through M031 platform to Target Chip2.5.8.2
The external power supply sources on M031 platform are shown in Figure 2-6.
USB Power Connector (J2)
NU1 pin8 (Vin)
External VDD Connector (JP1)
External VSS Connector (JP2)
Figure 2-6 External Power Supply Sources on M031 platform
To use Vin or J2 as external power supply source, please follow the below steps:
1. Switch the SW2 depends on the target chip operating voltage.
2. Remove the resistor on ICEJPR1 (MCUVCC).
3. Solder the resistor on ICEJPR2 (ICEVCC) depends on the ICE chip operating voltage.
4. Connect the external power supply to Vin or J2.
To use JP1 as external power supply source, please follow the below steps:
1. Switch the SW2 to OFF.
2. Remove the resistor on ICEJPR1 (MCUVCC).
3. Solder the resistor on ICEJPR2 (ICEVCC) depends on the ICE chip operating voltage.
4. Connect ICEJ3 to PC.
5. Connect the external power supply to JP1.
To use Vin or J2 as external power supply source with Nu-Link2-Me separated from NuMaker-
M031SD, please follow the below steps:
1. Switch the SW2 depends on the target chip operating voltage.
2. Separate the Nu-Link2-Me from NuMaker- M031SD.
3. Connect the external power supply to Vin or J2.
To use JP1 as external power supply source with Nu-Link2-Me separated from NuMaker-M031SD,
please follow the below steps:
1. Switch the SW2 to OFF.
2. Separate the Nu-Link2-Me from NuMaker-M031SD.
3. Connect the external power supply to JP1.

NuMaker-M031SD
Feb. 20, 2019 Page 19 of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
USB Power Connector (J2)
NU1 pin8 (Vin)
External VDD Connector (JP1)
External VSS Connector (JP2) Separate Nu-Link2-Me
"
"
Figure 2-7 External Power Supply Sources on M031 platform
Table 2-11 presents all power models when supplies external power through M031 platform. The
M031 platform external power sources are highlighted in yellow.
Model
Target Chip
Voltage
Vin [1]
J2
ICEJ3
SW2
Selection
JP1
ICEJPR1
(MCUVCC)
Selection [2]
ICEJPR2
(ICEVCC)
Selection [3]
ICE Chip
Voltage [4]
4
3.3 V
7 V ~ 12 V
Input
X
Ignore
NU1
3VCC
3.3 V output
Remove
resistor
3.3 V
3.3 V
5
3.3 V
X
Connect
to PC
Ignore
NU1
3VCC
3.3 V output
Remove
resistor
3.3 V
3.3 V
6
5 V
7 V ~ 12 V
Input
X
Ignore
NU1
5VCC
5 V output
Remove
resistor
3.3 V
3.3 V
7
5 V
X
Connect
to PC
Ignore
NU1
5VCC
5 V output
Remove
resistor
3.3 V
3.3 V
8
1.8 V ~ 3.6 V
Ignore [5]
Ignore [5]
Connect to
PC
OFF
DC Input
1.8 V ~ 3.6 V
Remove
resistor
1.8 V / 3.3 V
1.8 V / 3.3 V
9
1.8 V ~ 3.6 V
Ignore [5]
Ignore [5]
Nu-Link2-Me
removed
OFF
DC Input
1.8 V ~ 3.6 V
X
X
X
X: Unused.
Note:
1. The Vin input voltage will be converted by voltage regulator UP2 to 5 V.
2. 0Ω should be removed from ICEJPR1’s MCUVCC and 1.8 V / 3.3 V / 5 V.
3. 0Ω should be soldered between ICEJPR2’s ICEVCC and 1.8 V / 3.3 V.
4. The ICE chip voltage should be close to the target chip voltage.
5. JP1 external power input only provides voltage to target chip. Supply external power to Vin or J2 can provide
5V to NU1 pin5 (5V) and 3.3V to NU1 pin4 (3VCC).
Table 2-11 Supply External Power for M031 platform

NuMaker-M031SD
Feb. 20, 2019 Page 20 of 37 Rev 1.00
NUMAKER-M031SD USER MANUAL
Maker Nu-mbed NUC472 User Manual
2.5.9 External Reference Voltage Connector
Table 2-13 presents the external reference voltage connector.
Connector
Comment
VREF1
Connector for user to easily connect to the external reference voltage pin
of the target chip. User needs to remove the L5 ferrite bead.
Table 2-12 External Reference Voltage Connector
2.5.10 Ammeter Connector
Table 2-13 presents the ammeter connector.
Connector
Comment
AMMETER
Connector for user to easily measure the target chip power consumption.
User needs to remove the R16 resistor.
Table 2-13 Ammeter Connector
Remove the R16 Resistor
Figure 2-8 Wiring between Ammeter Connector and Ammeter
2.5.11 Extension Connectors
Table 2-14 presents the extension connectors.
Connector
Comment
JP3, JP4, JP5 and JP6
Full pins extension connectors on the NuMaker-M031SD.
NU1, NU2, NU3 and NU4
Arduino UNO compatible pins on the NuMaker-M031SD.
Table 2-14 Extension Connectors