Nuvoton NuMicro NuMaker-M031BTYE User manual

NuMaker-M031BTYE
Apr. 19, 2022 Page 1of 43 Rev 1.00
NUMAKER-M031BTYE USER MANUAL
Maker Nu-mbed NUC472 User Manual
NuMicro® Family
Arm®Cortex®-M0-based Microcontroller
NuMaker-M031BTYE
User Manual
Evaluation Board for NuMicro®M031BT 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 and
microprocessor 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

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Table of Contents
1OVERVIEW......................................................................................................7
2FEATURES......................................................................................................8
3HARDWARE CONFIGURATION.....................................................................9
3.1 Front View....................................................................................................................... 9
3.2 Rear View ..................................................................................................................... 10
3.3 Extension Connectors................................................................................................. 11
3.3.1 Pin Assignment for Extension Connectors .................................................................11
3.3.2 Arduino UNO Compatible Extension Connectors......................................................14
3.4 Power Supply Configuration ...................................................................................... 16
3.4.1 VIN Power Source..........................................................................................................16
3.4.2 5 V Power Sources.........................................................................................................16
3.4.3 3.3 V Power Sources .....................................................................................................17
3.4.4 1.8 V Power Sources .....................................................................................................17
3.4.5 Power Connectors..........................................................................................................17
3.4.6 USB Connectors.............................................................................................................18
3.4.7 Power Switches ..............................................................................................................18
3.4.8 Power Supply Models ....................................................................................................18
3.5 Ammeter Connector.................................................................................................... 22
3.6 Push Buttons................................................................................................................ 23
3.7 LEDs.............................................................................................................................. 23
3.8 HXT Clock Source Selection ..................................................................................... 23
3.9 Nu-Link2-Me................................................................................................................. 23
3.9.1 VCOM Switches..............................................................................................................24
3.9.2 Status LEDs ....................................................................................................................24
4QUICK START...............................................................................................25
4.1 Toolchain Supporting .................................................................................................. 25
4.2 Nuvoton Nu-Link Driver Installation.......................................................................... 25
4.3 BSP Firmware Download ........................................................................................... 27
4.4 Hardware Setup........................................................................................................... 27
4.5 Find the Example Project ........................................................................................... 29
4.6 Execute the Project under Toolchains...................................................................... 29
4.6.1 Keil MDK ..........................................................................................................................29
5NUMAKER-M031BTYE SCHEMATICS.........................................................38
5.1 Nu-Link2-Me................................................................................................................. 38
5.2 M031BTYE Target Board ........................................................................................... 39

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5.3Extension Connectors................................................................................................. 40
5.4 PCB Placement............................................................................................................ 41
6REVISION HISTORY .....................................................................................42

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List of Figures
Figure 1-1 NuMaker-M031BTYE Evaluation Board...................................................................... 7
Figure 3-1 Front View of NuMaker-M031BTYE............................................................................ 9
Figure 3-2 Rear View of NuMaker-M031BTYE .......................................................................... 10
Figure 3-3 M031BTYE3AN Extension Connectors..................................................................... 11
Figure 3-4 Arduino UNO Compatible Extension Connectors...................................................... 14
Figure 3-5 External Power Supply Sources on Nu-Link2-Me...................................................... 18
Figure 3-6 External Power Supply Sources on M031BTYE Target Board................................... 19
Figure 3-7 Detach the Nu-Link2-Me from NuMaker-M031BTYE................................................. 20
Figure 3-8 Wiring between Ammeter Connector and Ammeter .................................................. 22
Figure 4-1 Nu-Link USB Driver Installation Setup ...................................................................... 25
Figure 4-2 Nu-Link USB Driver Installation ................................................................................ 26
Figure 4-3 Open VCOM Function.............................................................................................. 27
Figure 4-4 ICE USB Connector ................................................................................................. 27
Figure 4-5 Device Manger......................................................................................................... 28
Figure 4-6 PuTTY Session Setting ............................................................................................ 28
Figure 4-7 TRSP_UART_Peripheral Project Folder Path ........................................................... 29
Figure 4-8 Warning Message of “Device not found” ................................................................... 29
Figure 4-9 Project File Migrate to Version 5 Format................................................................... 30
Figure 4-10 Debugger Setting in Options Window ..................................................................... 30
Figure 4-11 Programming Setting in Options Window................................................................ 31
Figure 4-12 Compile and Download the Project......................................................................... 31
Figure 4-13 Keil MDK Debug Mode........................................................................................... 32
Figure 4-14 Debug Message on Serial Port Terminal Windows ................................................. 33
Figure 4-15 Search for NuvotonBLE on Google Play Store or App Store ................................... 34
Figure 4-16 NuvotonBLE icon ................................................................................................... 34
Figure 4-17 Turn on Bluetooth on mobile phone........................................................................ 34
Figure 4-18 Connect to Nuvoton_TRSP_UART on Android Phone ............................................ 35
Figure 4-19 Connect to Nuvoton_TRSP_UART on iPhone ........................................................ 35
Figure 4-20 Transfer String from Android Phone to M031BT...................................................... 36
Figure 4-21 Transfer String from iPhone to M031BT.................................................................. 36
Figure 4-22 Transfer String from M031BT to Andriod Phone...................................................... 37
Figure 4-23 Transfer String from M031BT to iPhone.................................................................. 37
Figure 5-1 Nu-Link2-Me Circuit.................................................................................................. 38
Figure 5-2 M031BTYE Target Board Circuit .............................................................................. 39
Figure 5-3 Extension Connectors Circuit ................................................................................... 40
Figure 5-4 Front Placement....................................................................................................... 41

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Figure 5-5 Rear Placement ....................................................................................................... 41

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List of Tables
Table 3-1 Extension Connectors ............................................................................................... 11
Table 3-2 M031BTYE3AN Full-pin Extension Connectors and GPIO Function List..................... 13
Table 3-3 Arduino UNO Extension Connectors and M031BTYE3AN Mapping GPIO List ........... 15
Table 3-4 Vin Power Source...................................................................................................... 16
Table 3-5 5V Power Sources..................................................................................................... 16
Table 3-6 3.3 V Power Sources................................................................................................. 17
Table 3-7 1.8 V Power Sources................................................................................................. 17
Table 3-8 Power Connectors..................................................................................................... 17
Table 3-9 USB Connectors........................................................................................................ 18
Table 3-10 Power Switches....................................................................................................... 18
Table 3-11 Supply External Power through Nu-Link2-Me........................................................... 19
Table 3-12 Supply External Power for M031BTYE Target Board ............................................... 21
Table 3-13 Ammeter Connector ................................................................................................ 22
Table 3-14 Push Buttons........................................................................................................... 23
Table 3-15 LEDs....................................................................................................................... 23
Table 3-16 Cock Sources of HXT.............................................................................................. 23
Table 3-17 VCOM Function of Nu-Link2-Me.............................................................................. 24
Table 3-18 Operation Status LED Patterns................................................................................ 24

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1 OVERVIEW
The NuMaker-M031BTYE is an evaluation board for Nuvoton NuMicro M031BT series microcontrollers.
The M031BT series BLE MCU is compliant with the BLE 5.0 standard supporting data rates up to 2
Mbps, offering 2.4 GHz proprietary stacks to achieve more possibility for wireless connectivity and Over-
the-Air (OTA) for firmware upgrade. The NuMaker-M031BTYE consists of two parts: an M031BTYE
target board and an on-board Nu-Link2-Me debugger and programmer. The NuMaker-M031BTYE is
designed for project evaluation, prototype development and validation with power consumption
monitoring function.
The M031BTYE target board is based on NuMicroM031BTYE3AN. For the development flexibility, the
M031BTYE target board provides the extension connectors, the Arduino UNO compatible headers and
the capability of adopting multiple power supplies. Furthermore, the Nuvoton-designed ammeter
connector can measure the power consumption instantly, which is essential for the prototype evaluation.
In addition, there is an attached on-board debugger and programmer “Nu-Link2-Me”. The Nu-Link2-Me
supports on-chip debugging, online and offline ICP programming via SWD interface. The Nu-Link2-Me
supports virtual COM (VCOM) port for printing debug messages on PC. Besides, the programming
status could be shown on the built-in LEDs. Lastly, the Nu-Link2-Me could be detached from the
evaluation board and become a stand-alone mass production programmer.
Figure 1-1 NuMaker-M031BTYE Evaluation Board

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2 FEATURES
NuMicro M031BTYE3AN used as main microcontroller with function compatible with:
–M031BTYE3AN
–M031BTYD2AN
M031BTYE3AN extension connectors
Arduino UNO compatible extension connectors
Ammeter connector for measuring the microcontroller’s power consumption
PCB antenna
Microwave coaxial connector with switch for characteristics measurement
Flexible board power supply:
–External VDD power connector
–Arduino UNO compatible extension connector Vin
–USB FS connector on M031BTYE target board
–ICE USB connector on Nu-Link2-Me
On-board Nu-Link2-Me debugger and programmer:
–Debug through SWD interface
–Online/offline programming
–Virtual COM port function

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3 HARDWARE CONFIGURATION
3.1 Front View
ICE USB Connector
VCOM Switch
Reset Button
ICE Status LED
Off-line Program Button
USB PWR Connector
Power LED
PF15 LED
M031BTYE3AN
M031BTYE3AN Extension Connectors
Arduino UNO Compatible Extension Connectors
External VDD Connector
Nu-Link2-Me
Ammeter
ICE Chip: M48SSIDAE
External VSS ConnectorM031BTYE Target Board
VDD Switch
Microwave Coaxial Connectors
PCB Antenna
Figure 3-1 Front View of NuMaker-M031BTYE
Figure 3-1 shows the main components and connectors from the front side of NuMaker-M031BTYE.
The following lists components and connectors from the front view:
Target chip: M031BTYE3AN (U1)
USB PWR Connector (J2)
Arduino UNO Compatible Extension Connectors (NU1, NU2, NU3, NU4)
M031BT Extension Connectors (JP3, JP4, JP5 and JP6)
External VDD Power Connector (JP1)
External VSS Power Connector (JP2)
VDD Switch (SW2)
Ammeter Connector (AMMETER)
Microwave coaxial connector(J33)
Reset Button (SW1)
Power LED and PF15 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)

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3.2 Rear View
Figure 3-2 shows the main components and connectors from the rear side of NuMaker-M031BTYE.
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 3-2 Rear View of NuMaker-M031BTYE

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3.3 Extension Connectors
Table 3-1 presents the extension connectors.
Connector
Description
JP3, JP4, JP5 and JP6
Full pins extension connectors on the NuMaker-M031BTYE.
NU1, NU2, NU3 and NU4
Arduino UNO compatible pins on the NuMaker-M031BTYE.
Table 3-1 Extension Connectors
3.3.1 Pin Assignment for Extension Connectors
The NuMaker-M031BTYE provides the M031BTYE3AN onboard and extension connectors (JP3, JP4,
JP5 and JP6). Figure 3-3 shows the M031BTYE3AN extension connectors.
JP3
Pin13 ~ Pin24
JP6
Pin1 ~ Pin12
JP5 Pin25 Pin36
JP4 Pin65 ~ Pin48
Figure 3-3 M031BTYE3AN Extension Connectors

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Header
M031BTYE3AN
Pin No.
Function
JP3
JP3.1
1
PB.3/ADC0_CH3/ACMP0_N/I2C1_SCL/UART1_TXD/PWM0_CH2/PWM0_BRAKE0/TM2/INT2
JP3.2
2
PB.2/ADC0_CH2/ACMP0_P1/I2C1_SDA/UART1_RXD/PWM0_CH3/TM3/INT3
JP3.3
3
PB.1/ADC0_CH1/UART2_TXD/I2C1_SCL/PWM0_CH4/PWM1_CH4/PWM0_BRAKE0
JP3.4
4
PB.0/ADC0_CH0/UART2_RXD/I2C1_SDA/PWM0_CH5/PWM1_CH5/PWM0_BRAKE1
JP3.5
5
RF_AVDD1V2
JP3.6
6
VSS
JP3.7
7
RF_I/O
JP3.8
8
VSS
JP3.9
9
RF_VDDPA
JP3.10
10
PF.5/UART2_RXD/UART2_nCTS/PWM0_CH0/X32_IN/ADC0_ST
JP3.11
11
PF.4/UART2_TXD/UART2_nRTS/PWM0_CH1/X32_OUT
JP3.12
12
PF.3/UART0_TXD/I2C0_SCL/XT1_IN
JP5
JP5.1
13
PF.2/UART0_RXD/I2C0_SDA/XT1_OUT
JP5.2
14
RF_XTAL_IN
JP5.3
15
RF_XTAL_OUT
JP5.4
16
RF_AVDD1V2
JP5.5
17
RF_BUCK_FB
JP5.6
18
RF_BUCK_OUT
JP5.7
19
PA.3/UART1_TXD/I2C1_SCL/PWM0_CH2/CLKO/PWM1_BRAKE1
JP5.8
20
VSS
JP5.9
21
PA.2/UART1_RXD/I2C1_SDA/PWM0_CH3
JP5.10
22
PA.1/UART0_TXD/UART1_nCTS/PWM0_CH4
JP5.11
23
PA.0/UART0_RXD/UART1_nRTS/PWM0_CH5
JP5.12
24
PF.15/PWM0_BRAKE0/PWM0_CH1/TM2/CLKO/INT4
JP4
JP4.1
25
nRESET
JP4.2
26
PF.0/UART1_TXD/I2C1_SCL/UART0_TXD/ICE_DAT
JP4.3
27
PF.1/UART1_RXD/I2C1_SDA/UART0_RXD/ICE_CLK
JP4.4
28
PC.1/UART2_TXD/I2C0_SCL/PWM1_CH4/ACMP0_O
JP4.5
29
PC.0/UART2_RXD/I2C0_SDA/PWM1_CH5/ACMP1_O
JP4.6
30
RF_VDD
JP4.7
31
RF_CLKO

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Header
M031BTYE3AN
Pin No.
Function
JP4.8
32
VSS
JP4.9
33
LDO_CAP
JP4.10
34
VDD
JP4.11
35
PB.15/ADC0_CH15/USCI0_CTL1/UART0_nCTS/PWM1_CH0/TM0_EXT/PWM0_BRAKE1
JP4.12
36
PB.14/ADC0_CH14/USCI0_DAT1/UART0_nRTS/PWM1_CH1/TM1_EXT/CLKO
JP6
JP6.1
37
PB.13/ADC0_CH13/ACMP0_P3/ACMP1_P3/USCI0_DAT0/UART0_TXD/PWM1_CH2/TM2_EXT
JP6.2
38
PB.12/ADC0_CH12/ACMP0_P2/ACMP1_P2/USCI0_CLK/UART0_RXD/PWM1_CH3/TM3_EXT
JP6.3
39
AVDD
JP6.4
40
AVSS
JP6.5
41
PB.11/ADC0_CH11/UART0_nCTS/I2C1_SCL
JP6.6
42
PB.10/ADC0_CH10/UART0_nRTS/I2C1_SDA
JP6.7
43
PB.9/ADC0_CH9/UART0_TXD/UART1_nCTS
JP6.8
44
PB.8/ADC0_CH8/UART0_RXD/UART1_nRTS
JP6.9
45
PB.7/ADC0_CH7/UART1_TXD/PWM1_BRAKE0/PWM1_CH4/INT5/ACMP0_O
JP6.10
46
PB.6/ADC0_CH6/UART1_RXD/PWM1_BRAKE1/PWM1_CH5/INT4/ACMP1_O
JP6.11
47
PB.5/ADC0_CH5/ACMP1_N/I2C0_SCL/PWM0_CH0/UART2_TXD/TM0/INT0
JP6.12
48
PB.4/ADC0_CH4/ACMP1_P1/I2C0_SDA/PWM0_CH1/UART2_RXD/TM1/INT1
Table 3-2 M031BTYE3AN Full-pin Extension Connectors and GPIO Function List

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3.3.2 Arduino UNO Compatible Extension Connectors
Figure 3-4 shows the Arduino UNO compatible extension connectors.
UART1_RXD PB.2 D0
UART1_TXD PB.3 D1
PF.2* D2
PF.3* D3
PWM0_CH2 PA.3 D4
PWM0_CH3 PA.2 D5
PWM1_CH5 PB.6 D6
PWM1_CH4 PB.7 D7
PWM0_CH1 PB.4 D8
PWM0_CH0 PB.5 D9
PB.15(CS) PWM1_CH0 PB.15 D10
USCI0_DAT0(MOSI) PWM1_CH2 PB.13 D11
USCI0_DAT1(MISO) PWM1_CH1 PB.14 D12
USCI0_CLK(CLK) PWM1_CH3 PB.12 D13
VSS VSS
AVDD VREF
I2C0_SDA PC.0 SDA
I2C0_SCL PC.1 SCL
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.11 ADC0_CH11
A2 PB.10 ADC0_CH10
A1 PB.9 ADC0_CH9
A0 PB.8 ADC0_CH8
Note: 0 Ω should be soldered between R19/R20’s Pin 1 and Pin 2.
Figure 3-4 Arduino UNO Compatible Extension Connectors

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Header
NuMaker-M031BTYE
Header
NuMaker-M031BTYE
Compatible to
Arduino UNO
GPIO Pin of
M031BTYE
Compatible to
Arduino UNO
GPIO Pin of
M031BTYE
NU3
NU3.1
D0
PB.2
NU2
NU2.6
A5
PB.1
NU3.2
D1
PB.3
NU2.5
A4
PB.0
NU3.3
D2
PF.2
NU2.4
A3
PB.11
NU3.4
D3
PF.3
NU2.3
A2
PB.10
NU3.5
D4
PA.3
NU2.2
A1
PB.9
NU3.6
D5
PA.2
NU2.1
A0
PB.8
NU3.7
D6
PB.6
NU1
NU1.8
VIN
-
NU3.8
D7
PB.7
NU1.7
VSS
NU4
NU4.1
D8
PB.4
NU1.6
VSS
NU4.2
D9
PB.5
NU1.5
5V
NU4.3
D10
PB.15
NU1.4
3V
NU4.4
D11
PB.13
NU1.3
RST
nRESET
NU4.5
D12
PB.14
NU1.2
IOREF
AVDD
NU4.6
D13
PB.12
NU1.1
NC
-
NU4.7
VSS
VSS
NU4.8
VREF
AVDD
NU4.9
SDA
PC.0
NU4.10
SCL
PC.1
Table 3-3 Arduino UNO Extension Connectors and M031BTYE3AN Mapping GPIO List

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3.4 Power Supply Configuration
The NuMaker-M031BTYE is able to adopt multiple power supplies. External power sources include NU1
Vin (7 V to 12 V), VDD (depending on the target chip operating voltage), and PC through USB connector.
By using switches and voltage regulator, multiple power domains can be created on the NuMaker-
M031BTYE.
3.4.1 VIN Power Source
Table 3-4 presents the Vin power source.
Connector
Net Name in
Schematic
Description
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 NU1_5VCC.
Table 3-4 Vin Power Source
3.4.2 5 V Power Sources
Table 3-5 presents the 5 V power sources.
Connector
Net Name in
Schematic
Description
ICEJ3
USB_HS_VBUS
ICE USB connector supplies 5 V power from PC to
M031BTYE target board and Nu-Link2-Me.
J2
USB_VBUS
USB connector on NuMaker-M031BTYE supplies 5 V
power from PC to M031BTYE target board 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: M031BT operating voltage range is from 1.8 V to
3.6 V. Do not switch SW2.1 (NU1 5VCC) to ON.
Table 3-5 5V Power Sources

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3.4.3 3.3 V Power Sources
Table 3-6 presents the 3.3 V power sources.
Voltage Regulator
5 V Source
Description
ICEUP1
USB_HS_VBUS
ICEUP1 converts USB_HS_VBUS to 3.3 V and supplies
3.3 V to M031BTYE target board or ICE chip.
UP1
USB_VBUS
UP1 converts USB_VBUS to 3.3 V and supplies 3.3 V to
M031BTYE target board.
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
M031BTYE target board.
Note: SW2.2 (NU1 3VCC) should be switched to ON.
Table 3-6 3.3 V Power Sources
3.4.4 1.8 V Power Sources
Table 3-7 presents the 1.8 V power source.
Voltage Regular
5V Source
Description
ICEUP2
USB_HS_VBUS
ICEUP2 converts USB_HS_VBUS to 1.8 V and supplies
1.8 V to M031BTYE target board or ICE chip.
Table 3-7 1.8 V Power Sources
3.4.5 Power Connectors
Table 3-8 presents the power connectors.
Connector
Description
JP1
VDD connector on the NuMaker-M031BTYE.
Note: M031BT operating voltage range is from 1.8 V to 3.6 V.
JP2
VSS connector on the NuMaker-M031BTYE.
Table 3-8 Power Connectors

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3.4.6 USB Connectors
Table 3-9 presents the USB connectors.
Connector
Description
ICEJ3
ICE USB connector on Nu-Link2-Me for power supply, debugging and
programming from PC.
J2
USB FS connector on NuMaker-M031BTYE for power supply.
Table 3-9 USB Connectors
3.4.7 Power Switches
Table 3-10 presents the power switches.
Switch
Description
ICEJPR1
Configures the target chip operating voltage at 1.8 V / 3.3 V / 5 V.
Note: M031BT operating voltage range is from 1.8 V to 3.6 V. Do not switch
ICEJPR1 (MCUVCC) to 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.
Note: M031BT operating voltage range is from 1.8 V to 3.6 V. Do not switch
SW2.1 (NU1 5VCC) to ON.
Table 3-10 Power Switches
3.4.8 Power Supply Models
External Power Supply through Nu-Link2-Me to Target Chip
The external power supply source on Nu-Link2-Me is shown in Figure 3-5.
ICE USB Connector (ICEJ3)
Nu-Link2-Me
Figure 3-5 External Power Supply Sources on Nu-Link2-Me

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NUMAKER-M031BTYE USER MANUAL
Maker Nu-mbed NUC472 User Manual
To use ICEJ3 as external power supply source with Nu-Link2-Me, please follow the steps below:
1. Solder the resistor on ICEJPR1 (MCUVCC) depending on the target chip operating voltage.
2. Solder the resistor on ICEJPR2 (ICEVCC) depending on the ICE chip operating voltage.
3. Switch the SW2 to OFF.
4. Connect the external power supply to ICEJ3.
Table 3-11 presents all power models when supplying 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
-
-
1.8 V
output
2
3.3 V
Connect to
PC
3.3 V (default)
3.3 V (default)
3.3 V
Off
-
-
3.3 V
output
3
5 V
Connect to
PC
5 V
3.3 V (default)
3.3 V
Off
-
-
5 V
output
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.
3. -: Unused.
Table 3-11 Supply External Power through Nu-Link2-Me
External Power Supply through M031BTYE Target Board to Target Chip
The external power supply sources on M031BTYE target board are shown in Figure 3-6.
USB Power Connector (J2)
NU1 pin8 (Vin)
External VDD Connector (JP1)
External VSS Connector (JP2)
Figure 3-6 External Power Supply Sources on M031BTYE Target Board
To use Vin or J2 as external power supply source, please follow the steps below:
1. Switch the SW2 depending on the target chip operating voltage.
2. Remove the resistor on ICEJPR1 (MCUVCC).
3. Solder the resistor on ICEJPR2 (ICEVCC) depending on the ICE chip operating voltage.
4. Connect the external power supply to Vin or J2.

NuMaker-M031BTYE
Apr. 19, 2022 Page 20 of 43 Rev 1.00
NUMAKER-M031BTYE USER MANUAL
Maker Nu-mbed NUC472 User Manual
To use JP1 as external power supply source, please follow the steps below:
Switch the SW2 to OFF.
2. Remove the resistor on ICEJPR1 (MCUVCC).
3. Solder the resistor on ICEJPR2 (ICEVCC) depending 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 detached from NuMaker-
M031BTYE, please follow the steps below:
Switch the SW2 depending on the target chip operating voltage.
2. Detach the Nu-Link2-Me from NuMaker-M031BTYE.
3. Connect the external power supply to Vin or J2.
To use JP1 as external power supply source with Nu-Link2-Me detached from NuMaker-
M031BTYE, please follow the steps below:
Switch the SW2 to OFF.
2. Detach the Nu-Link2-Me from NuMaker-M031BTYE.
3. Connect the external power supply to JP1.
USB Power Connector (J2)
NU1 pin8 (Vin)
External VDD Connector (JP1)
External VSS Connector (JP2)
Detach Nu-Link2-Me
"
"
Figure 3-7 Detach the Nu-Link2-Me from NuMaker-M031BTYE