Nuvoton NuMaker NUC1262SE User manual

NuMaker-NUC1262SE
Mar. 24, 2021 Page 1of 46 Rev 1.00
NUMAKER-NUC1262SE USER MANUAL
Maker Nu-mbed NUC472 User Manual
NuMicro® Family
Based on Arm®Cortex®-M23
NuMaker-NUC1262SE
User Manual
Evaluation Board for NuMicro®NUC1262 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..........................................................................................................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 External Reference Voltage Connector..................................................................22
3.6 Ammeter Connector.................................................................................................22
3.7 Push Buttons ............................................................................................................22
3.8 LEDs .........................................................................................................................23
3.9 Nu-Link2-Me.............................................................................................................23
3.9.1 VCOM Switches..............................................................................................................23
3.9.2 Status LEDs ....................................................................................................................24
4QUICK START...................................................................................................25
4.1 Toolchains 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
4.6.2 IAR EWARM....................................................................................................................33
4.6.3 NuEclipse.........................................................................................................................35
5NUMAKER-NUC1262SE SCHEMATICS .........................................................41
5.1 Nu-Link2-Me.............................................................................................................41

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5.2 NUC1262 Target Board ...........................................................................................42
5.3 Extension Connectors .............................................................................................43
5.4 PCB Placement........................................................................................................44
6REVISION HISTORY.........................................................................................45

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List of Figures
Figure 1-1 NuMaker-NUC1262SE Evaluation Board.....................................................................7
Figure 3-1 Front View of NuMaker-NUC1262SE...........................................................................9
Figure 3-2 Rear View of NuMaker-NUC1262SE.........................................................................10
Figure 3-3 NUC1262SE4AE 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 NUC1262 Target Board......................................19
Figure 3-7 Detach the Nu-Link2-Me from NuMaker-NUC1262SE................................................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 Template 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 OptionsWindow......................................................................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 ..................................................32
Figure 4-15 IAR EWARM Window..............................................................................................33
Figure 4-16 Compile and Download the Project..........................................................................33
Figure 4-17 IAR EWARM Debug Mode ......................................................................................34
Figure 4-18 Debug Message on Serial Port Terminal Windows ..................................................34
Figure 4-19 Import the Project in NuEclipse................................................................................35
Figure 4-20 Import Projects Windows.........................................................................................35
Figure 4-21 Open Project Properties Window.............................................................................36
Figure 4-22 Project Properties Settings......................................................................................36
Figure 4-23 Build Project............................................................................................................37
Figure 4-24 Open Debug Configuration......................................................................................37
Figure 4-25 Main Tab Configuration...........................................................................................38
Figure 4-26 Debugger Tab Configuration ...................................................................................38
Figure 4-27 Startup Tab Configuration .......................................................................................39

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Figure 4-28 NuEclipse Debug Mode...........................................................................................40
Figure 4-29 Debug Message on Serial Port Terminal Windows ..................................................40
Figure 5-1 Nu-Link2-Me Circuit ..................................................................................................41
Figure 5-2 NUC1262 Target Board Circuit..................................................................................42
Figure 5-3 Extension Connectors Circuit ....................................................................................43
Figure 5-4 Front Placement........................................................................................................44
Figure 5-5 Rear Placement ........................................................................................................44

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List of Tables
Table 3-1 Extension Connectors ................................................................................................11
Table 3-2 NUC1262SE4AE Full-pin Extension Connectors and GPIO Function List....................13
Table 3-3 Arduino UNO Extension Connectors and NUC1262SE4AE Mapping GPIO List..........15
Table 3-4 Vin Power Source.......................................................................................................16
Table 3-5 5 V 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 NUC1262 Target Board...................................................21
Table 3-13 External Reference Voltage Connector.....................................................................22
Table 3-14 Ammeter Connector .................................................................................................22
Table 3-15 Push-Buttons............................................................................................................22
Table 3-16 LEDs........................................................................................................................23
Table 3-17 VCOM Function of Nu-Link2-Me...............................................................................23
Table 3-18 Operation Status LED Patterns.................................................................................24

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1 OVERVIEW
The NuMaker-NUC1262SE is an evaluation board for Nuvoton NuMicro NUC1262SE, NUC1262NE,
and NUC1262LE microcontrollers. The NuMaker-NUC1262SE consists of two parts: an NUC1262SE
target board and an on-board Nu-Link2-Me debugger and programmer. The NuMaker-NUC1262SE is
designed for project evaluation, prototype development and validation with power consumption
monitoring function.
The NUC1262SE target board is based on NuMicroNUC1262SE4AE. For the development flexibility,
the NUC1262SE target board provides the extension connectors of NUC1262SE4AE, 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-NUC1262SE Evaluation Board

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2 FEATURES
NuMicro NUC1262SE4AE microcontroller with function compatible with:
–NUC1262SE4AE
–NUC1262NE4AE
–NUC1262LE4AE
NUC1262SE4AE extension connectors
Arduino UNO compatible extension connectors
Ammeter connector for measuring the microcontroller’s power consumption
Flexible board power supply:
–External VDD power connector
–Arduino UNO compatible extension connector Vin
–USB FS connector on NUC1262 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
PB14 LED
VDD Switch
NUC1262SE4AE NUC1262SE4AE Extension Connectors
Arduino UNO Compatible Extension Connectors
External VDD Connector
Nu-Link2-Me
Ammeter
ICE Chip: M48SSIDAE
External VSS Connector
NUC1262 Target Board
External VREF Connector
Figure 3-1 Front View of NuMaker-NUC1262SE
Figure 3-1 shows the main components and connectors from the front side of NuMaker-NUC1262SE.
The following lists components and connectors from the front view:
Target chip: NUC1262SE4AE (U1)
USB PWR Connector (J2)
Arduino UNO Compatible Extension Connectors (NU1, NU2, NU3, NU4)
NUC1262 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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3.2 Rear View
Figure 3-2 shows the main components and connectors from the rear side of NuMaker-NUC1262SE.
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-NUC1262SE

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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-NUC1262SE.
NU1, NU2, NU3 and NU4
Arduino UNO compatible pins on the NuMaker-NUC1262SE.
Table 3-1 Extension Connectors
3.3.1 Pin Assignment for Extension Connectors
The NuMaker-NUC1262SE provides the NUC1262SE4AE onboard and extension connectors (JP3,
JP4, JP5 and JP6). Figure 3-3 shows the NUC1262SE4AE extension connectors.
JP3
Pin1 ~ Pin16
JP6
Pin47 ~ Pin64
JP5 Pin17 ~ Pin32
JP4 Pin33 ~ Pin46
Figure 3-3 NUC1262SE4AE Extension Connectors

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Header
NUC1262SE4AE
Pin No.
Function
JP3
JP3.1
1
PB.6/ADC0_CH6/UART1_RXD/BPWM1_CH5/BPWM3_CH5/INT4
JP3.2
2
PB.5/ADC0_CH5/SPI1_MISO/I2C0_SCL/BPWM2_CH0/LLSI_CH4/TM0/INT0
JP3.3
3
PB.4/ADC0_CH4/SPI1_MOSI/I2C0_SDA/BPWM2_CH1/LLSI_CH5/TM1/INT1
JP3.4
4
PB.3/ADC0_CH3/SPI1_CLK/I2C1_SCL/UART1_TXD/BPWM2_CH2/LLSI_CH6/TM2/INT2
JP3.5
5
PB.2/ADC0_CH2/SPI1_SS/I2C1_SDA/UART1_RXD/BPWM2_CH3/LLSI_CH7/TM3/INT3
JP3.6
6
PB.1/ADC0_CH1/VDET_P1/SPI1_I2SMCLK/I2C1_SCL/BPWM2_CH4/BPWM3_CH4
JP3.7
7
PB.0/ADC0_CH0/VDET_P0/SPI0_I2SMCLK/I2C1_SDA/BPWM2_CH5/BPWM3_CH5
JP3.8
8
PA.11/BPWM0_CH0/TM0_EXT
JP3.9
9
PA.10/BPWM0_CH1/TM1_EXT
JP3.10
10
PA.9/UART1_TXD/BPWM0_CH2/TM2_EXT
JP3.11
11
PA.8/UART1_RXD/BPWM0_CH3/TM3_EXT/INT4
JP3.12
12
PF.6/SPI0_MOSI
JP3.13
13
PF.14/LLSI_CH3/BPWM2_CH4/CLKO/TM3/INT5
JP3.14
14
PF.5/BPWM2_CH0/BPWM0_CH4/X32_IN/ADC0_ST
JP3.15
15
PF.4/BPWM2_CH1/BPWM0_CH5/X32_OUT
JP3.16
16
PF.3/UART0_TXD/I2C0_SCL/XT1_IN/BPWM1_CH0
JP5
JP5.1
17
PF.2/UART0_RXD/I2C0_SDA/XT1_OUT/BPWM1_CH1
JP5.2
18
PC.7/SPI1_MISO/UART0_nCTS/I2C1_SMBAL/BPWM3_CH2/BPWM1_CH0/TM0/INT3
JP5.3
19
PC.6/SPI1_MOSI/UART0_nRTS/I2C1_SMBSUS/BPWM3_CH3/BPWM1_CH1/TM1/INT2
JP5.4
20
PA.7/SPI1_CLK/UART0_TXD/I2C1_SCL/BPWM3_CH4/BPWM1_CH2/TM2/INT1
JP5.5
21
PA.6/SPI1_SS/UART0_RXD/I2C1_SDA/BPWM3_CH5/BPWM1_CH3/TM3/INT0
JP5.6
22
VSS
JP5.7
23
VDD
JP5.8
24
PD.15/LLSI_CH7/BPWM2_CH5/TM3/INT1
JP5.9
25
PA.5/SPI1_I2SMCLK/UART0_nCTS/UART0_TXD/I2C0_SCL/BPWM0_CH5/BPWM2_CH0
JP5.10
26
VSS
JP5.11
27
PA.3/SPI0_SS/I2C0_SMBAL/UART1_TXD/I2C1_SCL/LLSI_CH4/BPWM0_CH3/BPWM2_CH2/CLKO
JP5.12
28
PA.2/SPI0_CLK/I2C0_SMBSUS/UART1_RXD/I2C1_SDA/LLSI_CH5/BPWM0_CH2/BPWM2_CH3
JP5.13
29
PA.1/SPI0_MISO/UART0_TXD/UART1_nCTS/LLSI_CH6/BPWM0_CH1/BPWM2_CH4
JP5.14
30
PA.0/SPI0_MOSI/UART0_RXD/UART1_nRTS/LLSI_CH7/BPWM0_CH0/BPWM2_CH5
JP5.15
31
PF.15/UART0_nRTS/BPWM1_CH0/TM2/CLKO/INT4
JP5.16
32
nRESET
JP5.17
33
PF.0/UART1_TXD/I2C1_SCL/UART0_TXD/BPWM1_CH0/ICE_DAT

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Header
NUC1262SE4AE
Pin No.
Function
JP5.18
34
PF.1/UART1_RXD/I2C1_SDA/UART0_RXD/BPWM1_CH1/ICE_CLK
JP4
JP4.1
35
PC.5/I2C1_SCL/BPWM3_CH0/LLSI_CH0
JP4.2
36
PC.4/SPI1_I2SMCLK/I2C1_SDA/BPWM3_CH1/LLSI_CH1
JP4.3
37
PC.3/SPI1_MISO/I2C0_SMBAL/BPWM3_CH2/LLSI_CH2
JP4.4
38
PC.2/SPI1_MOSI/I2C0_SMBSUS/BPWM3_CH3/LLSI_CH3
JP4.5
39
PC.1/SPI1_CLK/I2C0_SCL/LLSI_CH8/ADC0_ST/BPWM3_CH4/BPWM2_CH1
JP4.6
40
PC.0/SPI1_SS/I2C0_SDA/LLSI_CH9/BPWM3_CH5/BPWM3_CH3
JP4.7
41
PD.3/SPI0_SS/UART0_TXD
JP4.8
42
PD.2/SPI0_CLK/UART0_RXD
JP4.9
43
PD.1/SPI0_MISO
JP4.10
44
PD.0/SPI0_MOSI/TM2
JP4.11
45
USB_VBUS
JP4.12
46
USB_D-
JP4.13
47
USB_D+
JP4.14
48
USB_VDD33_CAP
JP6
JP6.1
49
VSS
JP6.2
50
LDO_CAP
JP6.3
51
VDD
JP6.4
52
PC.14/SPI1_MOSI/SPI0_I2SMCLK/TM1
JP6.5
53
PB.15/SPI0_SS/UART0_nCTS/LLSI_CH0/BPWM3_CH0/TM0_EXT
JP6.6
54
PB.13/SPI0_MISO/UART0_TXD/LLSI_CH2/BPWM3_CH2/TM2_EXT
JP6.7
55
PB.12/SPI0_MOSI/UART0_RXD/LLSI_CH3/BPWM3_CH3/TM3_EXT
JP6.8
56
VDD
JP6.9
57
AVDD
JP6.10
58
VREF
JP6.11
59
AVss
JP6.12
60
PB.11/UART0_nCTS/I2C1_SCL/SPI0_I2SMCLK/BPWM1_CH0/LLSI_CH8
JP6.13
61
PB.10/UART0_nRTS/I2C1_SDA/BPWM1_CH1/ARGB0_CH9
JP6.14
62
PB.9/UART0_TXD/UART1_nCTS/I2C1_SMBAL/I2C0_SCL/BPWM1_CH2
JP6.15
63
PB.8/UART0_RXD/UART1_nRTS/I2C1_SMBSUS/I2C0_SDA/BPWM1_CH3
JP6.16
64
PB.7/ADC0_CH7/UART1_TXD/BPWM1_CH4/BPWM3_CH4/INT5
Table 3-2 NUC1262SE4AE 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.
MISO CLK RESET SS
PC.7 PA.7 nRESET PA.6
SPI1_DAT1 SPI1_CLK
5V MOSI GND -
VDD PC.6 VSS PB.15
SPI1_DAT0
BPWM0_CH5 PA.5 D8
BPWM1_CH1 PB.10 D9
SPI0_SS BPWM0_CH3 PA.3 D10
SPI0_MOSI BPWM0_CH0 PA.0 D11
SPI0_MISO BPWM0_CH1 PA.1 D12
SPI0_CLK BPWM0_CH2 PA.2 D13
VSS VSS
VREF VREF
I2C0_SDA PC.0 SDA
I2C0_SCL PC.1 SCL
UART1_RXD BPWM2_CH3 PB.2 D0
UART1_TXD BPWM2_CH2 PB.3 D1
I2C1_SDA BPWM3_CH1 PC.4 D2
I2C1_SCL BPWM3_CH0 PC.5 D3
BPWM3_CH2 PC.3 D4
BPWM3_CH3 PC.2 D5
BPWM2_CH5 PD.15 D6
BPWM1_CH0 PF.15 D7
VIN
VSS
VSS
5V
3V
RST
IOREF VDD
NC
A5 PB.1 ADC0_CH1 I2C1_SCL
A4 PB.0 ADC0_CH0 I2C1_SDA
A3 PB.4 ADC0_CH4
A2 PB.5 ADC0_CH5
A1 PB.6 ADC0_CH6
A0 PB.7 ADC0_CH7
Figure 3-4 Arduino UNO Compatible Extension Connectors

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Header
NuMaker-NUC1262SE
Header
NuMaker-NUC1262SE
Compatible to
Arduino UNO
GPIO Pin of
NUC1262
Compatible to
Arduino UNO
GPIO Pin of
NUC1262
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
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
PD.15
NU1
NU1.8
VIN
-
NU3.8
D7
PF.15
NU1.7
VSS
NU4
NU4.1
D8
PA.5
NU1.6
VSS
NU4.2
D9
PB.10
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
VDD
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 3-3 Arduino UNO Extension Connectors and NUC1262SE4AE Mapping GPIO List

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3.4 Power Supply Configuration
The NuMaker-NUC1262SE 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-NUC1262SE.
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
NUC1262 target board and Nu-Link2-Me.
J2
USB_VBUS
USB connector on NuMaker-NUC1262SE supplies 5 V
power from PC to NUC1262 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: NUC1262 operating voltage range is from 2.5 V
to 5.5 V.
Table 3-5 5 V 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 NUC1262 target board or ICE chip.
UP1
USB_VBUS
UP1 converts USB_VBUS to 3.3 V and supplies 3.3 V
to NUC1262 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
NUC1262 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 NUC1262 target board or ICE chip.
Note: NUC1262 operating voltage range is from 2.5 V to
5.5 V. Do not change ICEVCC(ICEJPR2) resistor to 1.8
V.
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-NUC1262SE.
Note: NUC1262 operating voltage range is from 2.5 V to 5.5V.
JP2
VSS connector on the NuMaker-NUC1262SE.
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-NUC1262SE 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: NUC1262 operating voltage range is from 2.5 V to 5.5 V. Do not
switch ICEJPR1 (MCUVCC) to 1.8 V.
ICEJPR2
Configures the ICE chip operating voltage at 1.8 V / 3.3 V.
Note: NUC operating voltage range is from 2.5 V to 5.5 V. Do not change
ICEVCC(ICEJPR2) resistor to 1.8 V.
SW2
Configures the target chip operating voltage at 3.3 V / 5 V.
Note: NUC1262 operating voltage range is from 3.3 V to 5 V.
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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To use ICEJ3 as external power supply source with Nu-Link2-Me, please follow the steps below:
Solder the resistor on ICEJPR1 (MCUVCC) depending on the target chip operating voltage.
Solder the resistor on ICEJPR2 (ICEVCC) depending on the ICE chip operating voltage.
Switch the SW2 to OFF.
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 NUC1262 Target Board to Target Chip
The external power supply sources on NUC1262 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 NUC1262 Target Board
To use Vin or J2 as external power supply source, please follow the steps below:
Switch the SW2 depending on the target chip operating voltage.
Remove the resistor on ICEJPR1 (MCUVCC).
Solder the resistor on ICEJPR2 (ICEVCC) depending on the ICE chip operating voltage.
Connect the external power supply to Vin or J2.

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To use JP1 as external power supply source, please follow the steps below:
Switch the SW2 to OFF.
Remove the resistor on ICEJPR1 (MCUVCC).
Solder the resistor on ICEJPR2 (ICEVCC) depending on the ICE chip operating voltage.
Connect ICEJ3 to PC.
Connect the external power supply to JP1.
To use Vin or J2 as external power supply source with Nu-Link2-Me detached from NuMaker-
NUC1262SE, please follow the steps below:
Switch the SW2 depending on the target chip operating voltage.
Detach the Nu-Link2-Me from NuMaker-NUC1262SE.
Connect the external power supply to Vin or J2.
To use JP1 as external power supply source with Nu-Link2-Me detached from NuMaker-NUC1262SE,
please follow the steps below:
Switch the SW2 to OFF.
Detach the Nu-Link2-Me from NuMaker-NUC1262SE.
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-NUC1262SE