Nuvoton NuMicro M23 Series User manual

NuMaker-M2351SF
Sep. 24, 2019 Page 1of 35 Rev 1.00
NUMAKER-M2351SF USER MANUAL
Maker Nu-mbed NUC472 User Manual
ARM®Cortex®-M
32-bit Microcontroller
NuMaker-M2351SF
User Manual
NuMicro®M23 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

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Table of Contents
1Overview.................................................................................... 6
NuMaker-M2351SF Features............................................................... 6
2NuMaker-M2351SF Overview........................................................... 8
Front View...................................................................................... 8
Rear View...................................................................................... 9
Arduino UNO Compatible Extension Connectors.......................................10
Pin Assignment for Extension Connectors...............................................12
System Configuration .......................................................................15
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..................................................................................21
PCB Placement ..............................................................................22
3Quick Start ............................................................................... 23
Toolchains Supporting ......................................................................23
Nuvoton Nu-Link Driver Installation.......................................................23
BSP Firmware Download...................................................................25
Hardware Setup..............................................................................25
Find the Example Project...................................................................27
Execute the Project under Toolchains....................................................27
3.6.1 Keil MDK ............................................................................................. 27
4NuMaker-M2351SF Schematics...................................................... 31
Nu-Link2-Me..................................................................................31

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M2351SF platform...........................................................................32
Extension Connector........................................................................33
5REVISION HISTORY................................................................... 34

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List of Figures
Figure 1-1 NuMaker-M2351SF Board.............................................................................................. 6
Figure 2-1 Front View of NuMaker-M2351SF.................................................................................. 8
Figure 2-2 Rear View of NuMaker-M2351SF................................................................................... 9
Figure 2-3 Arduino UNO Compatible Extension Connectors......................................................... 10
Figure 2-4 M2351SFSIAAP Extension Connectors....................................................................... 12
Figure 2-5 External Power Supply Sources on Nu-Link2-Me ........................................................ 17
Figure 2-6 External Power Supply Sources on M2351SF platform............................................... 18
Figure 2-7 Separate the Nu-Link2-Me from NuMaker-M2351SF................................................... 19
Figure 2-8 Wiring between Ammeter Connector and Ammeter..................................................... 20
Figure 2-9 Front Placement ........................................................................................................... 22
Figure 2-10 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 SecureFlashDemo 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............................................................................ 30
Figure 3-13 Keil MDK Debug Mode............................................................................................... 30
Figure 3-14 Debug Message on Serial Port Terminal Windows.................................................... 30
Figure 4-1 Nu-Link2-Me Circuit...................................................................................................... 31
Figure 4-2 M2351 platform Circuit.................................................................................................. 32
Figure 4-3 Extension Connectors Circuit ....................................................................................... 33

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List of Tables
Table 2-1 Arduino UNO Extension Connectors and M2351SFSIAAP Mapping GPIO List........... 11
Table 2-2 M2351SFSIAAP 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 M2351SF 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

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1 OVERVIEW
This user manual is aimed to give users a fast introduction to the use of NuMaker-M2351SF board.
The NuMaker-M2351SF consists of two parts, a M2351SF platform and an on-board Nu-Link2-Me
debugger and programmer. The NuMaker-M2351SF allows users to quickly develop and easily program
and debug application.
The NuMaker-M2351SF offers M2351SFSIAAP 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-M2351SF 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-M2351SF, allowing user to use as a mass production
programming tool.
Figure 1-1 NuMaker-M2351SF Board
NuMaker-M2351SF Features
M2351SFSIAAP in LQFP64 package
M2351SFSIAAP 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
Arduino UNO compatible extension connector Vin
USB FS connector on M2351SF platform
ICE USB connector on Nu-Link2-Me
On-board Nu-Link2-Me debugger and programmer:

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Debug through SWD interface
On-line/off-line programming
Virtual COM port function

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2 NUMAKER-M2351SF OVERVIEW
Front View
Figure 2-1 Front View of NuMaker-M2351SF
Figure 2-1 shows the main components and connectors from the front side of NuMaker-M2351SF.
The following lists components and connectors from the front view:
Target Chip: M2351SFSIAAP(U1)
USB FS Connector(J2)
Arduino UNO Compatible Extension Connectors (NU1, NU2, NU3, NU4)
M2351SF 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)

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Rear View
Figure 2-2 shows the main components and connectors from the rear side of NuMaker-M2351SF.
The following lists components and connectors from the rear view:
Nu-Link2-Me
MCUVCC Power Switch (ICEJPR1)
ICEVCC Power Switch (ICEJPR2)
Figure 2-2 Rear View of NuMaker-M2351SF

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Arduino UNO Compatible Extension Connectors
Figure 2-3 shows the Arduino UNO compatible extension connectors.
Figure 2-3 Arduino UNO Compatible Extension Connectors

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Header
NuMaker-M2351SFSIAAP
Header
NuMaker-M2351SFSIAAP
Compatible to
Arduino UNO
GPIO Pin of M2351SF
Compatible to
Arduino UNO
GPIO Pin of M2351SF
N
U
3
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
4
NU4.1
D8
PC.7
NU1.6
VSS
NU4.2
D9
PC.6
NU1.5
5V
NU4.3
D10
PD.3
NU1.4
3V
NU4.4
D11
PD.0
NU1.3
RST
nRESET
NU4.5
D12
PD.1
NU1.2
IOREF
VDD
NU4.6
D13
PD.2
NU1.1
NC
-
NU4.7
VSS
GND
NU4.8
VREF
VREF
NU4.9
SDA
PC.0
NU4.10
SCL
PC.1
Table 2-1 Arduino UNO Extension Connectors and M2351SFSIAAP Mapping GPIO List

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Pin Assignment for Extension Connectors
The NuMaker-M2351SF provides the M2351SFSIAAP target chip onboard and full pins extension
connectors (JP3, JP4, JP5 and JP6). The Figure 2-4 shows the M2351SFSIAAP extension connectors.
Figure 2-4 M2351SFSIAAP Extension Connectors

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Header
M2351SFSIAAP
Pin No.
Function
JP3
JP3.1
JP3.2
1
PB.6/EADC0_CH6/EBI_nWRH/USCI1_DAT1/UART1_RXD/EBI_nCS1/BPWM1_CH5/EP
WM1_BRAKE1/EPWM1_CH5/INT4/USB_VBUS_EN/ACMP1_O
JP3.3
JP3.4
2
PB.5/EADC0_CH5/ACMP1_N/EBI_ADR0/SD0_DAT3/SPI1_MISO/I2C0_SCL/UART5_TX
D/USCI1_CTL0/SC0_CLK/I2S0_BCLK/EPWM0_CH0/TM0/INT0
JP3.5
JP3.6
3
PB.4/EADC0_CH4/ACMP1_P1/EBI_ADR1/SD0_DAT2/SPI1_MOSI/I2C0_SDA/UART5_R
XD/USCI1_CTL1/SC0_DAT/I2S0_MCLK/EPWM0_CH1/TM1/INT1
JP3.7
JP3.8
4
PB.3/EADC0_CH3/ACMP0_N/EBI_ADR2/SD0_DAT1/SPI1_CLK/UART1_TXD/UART5_n
RTS/USCI1_DAT1/SC0_RST/I2S0_DI/EPWM0_CH2/TM2/INT2
JP3.9
JP3.10
5
PB.2/EADC0_CH2/ACMP0_P1/EBI_ADR3/SD0_DAT0/SPI1_SS/UART1_RXD/UART5_n
CTS/USCI1_DAT0/SC0_PWR/I2S0_DO/EPWM0_CH3/TM3/INT3
JP3.11
JP3.12
6
PB.1/EADC0_CH1/EBI_ADR8/SD0_CLK/SPI1_I2SMCLK/SPI3_I2SMCLK/UART2_TXD/
USCI1_CLK/I2C1_SCL/I2S0_LRCK/EPWM0_CH4/EPWM1_CH4/EPWM0_BRAKE0
JP3.13
JP3.14
7
PB.0/EADC0_CH0/EBI_ADR9/SD0_CMD/UART2_RXD/SPI0_I2SMCLK/I2C1_SDA/EPW
M0_CH5/EPWM1_CH5/EPWM0_BRAKE1
JP3.15
JP3.16
8
PA.11/ACMP0_P0/EBI_nRD/SC2_PWR/SPI2_SS/USCI0_CLK/I2C2_SCL/BPWM0_CH0/
EPWM0_SYNC_OUT/TM0_EXT/DAC1_ST
JP3.17
JP3.18
9
PA.10/ACMP1_P0/EBI_nWR/SC2_RST/SPI2_CLK/USCI0_DAT0/I2C2_SDA/BPWM0_C
H1/QEI1_INDEX/ECAP0_IC0/TM1_EXT/DAC0_ST
JP3.19
JP3.20
10
PA.9/EBI_MCLK/SC2_DAT/SPI2_MISO/USCI0_DAT1/UART1_TXD/BPWM0_CH2/QEI1_
A/ECAP0_IC1/TM2_EXT
JP3.21
JP3.22
11
PA.8/EBI_ALE/SC2_CLK/SPI2_MOSI/USCI0_CTL1/UART1_RXD/BPWM0_CH3/QEI1_B/
ECAP0_IC2/TM3_EXT/INT4
JP3.23
JP3.24
12
PF.6/EBI_ADR19/SC0_CLK/I2S0_LRCK/SPI0_MOSI/UART4_RXD/EBI_nCS0/TAMPER0
JP3.25
JP3.26
13
VBAT
JP3.27
JP3.28
14
PF.5/X32_IN
JP3.29
JP3.30
15
PF.4/X32_OUT
JP3.31
JP3.32
16
PF.3/XT1_IN
JP5
JP5.1
JP5.2
17
PF.2/XT1_OUT
JP5.3
JP5.4
18
PC.7/EBI_AD9/SPI1_MISO/UART4_TXD/SC2_PWR/UART0_nCTS/I2C1_SMBAL/EPWM
1_CH2/BPWM1_CH0/TM0/INT3
JP5.5
JP5.6
19
PC.6/EBI_AD8/SPI1_MOSI/UART4_RXD/SC2_RST/UART0_nRTS/I2C1_SMBSUS/EPW
M1_CH3/BPWM1_CH1/TM1/INT2
JP5.7
JP5.8
20
PA.7/EBI_AD7/SPI1_CLK/SC2_DAT/UART0_TXD/I2C1_SCL/EPWM1_CH4/BPWM1_CH
2/ACMP0_WLAT/TM2/INT1
JP5.9
JP5.10
21
PA.6/EBI_AD6/SPI1_SS/SC2_CLK/UART0_RXD/I2C1_SDA/EPWM1_CH5/BPWM1_CH
3/ACMP1_WLAT/TM3/INT0
JP5.11
JP5.12
22
VSS
JP5.13
JP5.14
23
VDD_1
JP5.15
JP5.16
24
LDO_CAP_2
JP5.17
JP5.18
25
NC
JP5.19
JP5.20
26
NC
JP5.21
JP5.22
27
P27_PullUp
JP5.23
JP5.24
28
NC
JP5.25
JP5.26
29
NC
JP5.27
JP5.28
30
NC
JP5.29
JP5.30
31
VDDIO
JP5.31
JP5.32
32
nRESET
JP4
JP4.1
JP4.2
33
PF.0/ICE_DAT

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JP4.3
JP4.4
34
PF.1/ICE_CLK
JP4.5
JP4.6
35
PC.5/EBI_AD5/QSPI0_MISO1/UART2_TXD/I2C1_SCL/CAN0_TXD/UART4_TXD/EPWM
1_CH0
JP4.7
JP4.8
36
PC.4/EBI_AD4/QSPI0_MOSI1/SC1_nCD/I2S0_BCLK/SPI1_I2SMCLK/UART2_RXD/I2C1
_SDA/CAN0_RXD/UART4_RXD/EPWM1_CH1
JP4.9
JP4.10
37
PC.3/EBI_AD3/QSPI0_SS/SC1_PWR/I2S0_MCLK/SPI1_MISO/UART2_nRTS/I2C0_SM
BAL/UART3_TXD/EPWM1_CH2
JP4.11
JP4.12
38
PC.2/EBI_AD2/QSPI0_CLK/SC1_RST/I2S0_DI/SPI1_MOSI/UART2_nCTS/I2C0_SMBSU
S/UART3_RXD/EPWM1_CH3
JP4.13
JP4.14
39
PC.1/EBI_AD1/QSPI0_MISO0/SC1_DAT/I2S0_DO/SPI1_CLK/UART2_TXD/I2C0_SCL/E
PWM1_CH4/ACMP0_O
JP4.15
JP4.16
40
PC.0/EBI_AD0/QSPI0_MOSI0/SC1_CLK/I2S0_LRCK/SPI1_SS/UART2_RXD/I2C0_SDA/
EPWM1_CH5/ACMP1_O
JP4.17
JP4.18
41
PD.3/EBI_AD10/USCI0_CTL1/SPI0_SS/UART3_nRTS/USCI1_CTL0/SC2_PWR/SC1_nC
D/UART0_TXD
JP4.19
JP4.20
42
PD.2/EBI_AD11/USCI0_DAT1/SPI0_CLK/UART3_nCTS/SC2_RST/UART0_RXD
JP4.21
JP4.22
43
PD.1/EBI_AD12/USCI0_DAT0/SPI0_MISO/UART3_TXD/I2C2_SCL/SC2_DAT
JP4.23
JP4.24
44
PD.0/EBI_AD13/USCI0_CLK/SPI0_MOSI/UART3_RXD/I2C2_SDA/SC2_CLK/TM2
JP4.25
JP4.26
45
PA.12/USB_VBUS
JP4.27
JP4.28
46
PA.13/USB_D-
JP4.29
JP4.30
47
PA.14/USB_D+
JP4.15
JP4.32
48
PA.15/USB_OTG_ID
JP6
JP6.1
JP6.2
49
VSS
JP6.3
JP6.4
50
Vsw
JP6.5
JP6.6
51
VDD_2
JP6.7
JP6.8
52
LDO_CAP_1
JP6.9
JP6.10
53
USB_VBUS_EN
JP6.11
JP6.12
54
USB_VBUS_ST
JP6.13
JP6.14
55
PB.13/UART0_TXD
JP6.15
JP6.16
56
PB.12/EADUART0_RXD
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/EADC0_CH11/EBI_ADR16/UART0_nCTS/UART4_TXD/I2C1_SCL/CAN0_TXD/S
PI0_I2SMCLK/BPWM1_CH0/SPI3_CLK
JP6.25
JP6.26
61
PB.10/EADC0_CH10/EBI_ADR17/USCI1_CTL0/UART0_nRTS/UART4_RXD/I2C1_SDA/
CAN0_RXD/BPWM1_CH1/SPI3_SS
JP6.27
JP6.28
62
PB.9/EADC0_CH9/EBI_ADR18/USCI1_CTL1/UART0_TXD/UART1_nCTS/I2C1_SMBAL/
BPWM1_CH2/SPI3_MISO/INT7
JP6.29
JP6.30
63
PB.8/EADC0_CH8/EBI_ADR19/USCI1_CLK/UART0_RXD/UART1_nRTS/I2C1_SMBSUS
/BPWM1_CH3/SPI3_MOSI/INT6
JP6.15
JP6.32
64
PB.7/EADC0_CH7/EBI_nWRL/USCI1_DAT0/UART1_TXD/EBI_nCS0/BPWM1_CH4/EP
WM1_BRAKE0/EPWM1_CH4/INT5/USB_VBUS_ST/ACMP0_O
Table 2-2 M2351SFSIAAP Full-pin Extension Connectors and GPIO Function List

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System Configuration
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-
M2351SF.
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
M2351SF platform and Nu-Link2-Me.
J2
USB_VBUS
USB connector on NuMaker-M2351SF supplies 5 V
power from PC to M2351SF 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: M2351SF 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 M2351SF platform or ICE chip.
UP1
USB_VBUS
UP1 converts USB_VBUS to 3.3 V and supplies 3.3 V
to M2351SF 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 M2351SF platform.
Note: SW2.2(NU1 3VCC) should be switched to ON.
Table 2-5 3.3 V Power Sources

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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 M2351SF platform or ICE chip.
UP3
NU1_5VCC
UP3 converts NU1_5VCC to 1.8V and supplies 1.8V to
internal SPI flash.
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-M2351SF.
JP2
VSS connector on the NuMaker-M2351SF.
VBAT
VBAT connector on the NuMaker-M2351SF.
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-M2351SF 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

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2.5.8 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 2-5.
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 ICEJ3.
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

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External Power Supply through M2351SF platform to Target Chip
The external power supply sources on M2351SF platform are shown in Figure 2-6.
Figure 2-6 External Power Supply Sources on M2351SF 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-M2351SF,
please follow the below steps:
1. Switch the SW2 depends on the target chip operating voltage.
2. Separate the Nu-Link2-Me from NuMaker-M2351SF.
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-M2351SF,
please follow the below steps:
1. Switch the SW2 to OFF.
2. Separate the Nu-Link2-Me from NuMaker-M2351SF.
3. Connect the external power supply to JP1.

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Figure 2-7 Separate the Nu-Link2-Me from NuMaker-M2351SF
Table 2-11 presents all power models when supplies external power through M2351SF platform. The
M2351SF 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 M2351SF platform

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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-M2351SF.
NU1, NU2, NU3 and
NU4
Arduino UNO compatible pins on the NuMaker-M2351SF.
Table 2-14 Extension Connectors