Nuvoton Nu-Link2-Pro User manual

Nu-Link2-Pro Debugger and Programmer
Mar. 13, 2020 Page 1of 77 Rev 1.00
NU-LINK2-PRO DEBUGGER and PROGRAMMER USER MANUAL
Maker Nu-mbed NUC472 User Manual
Nu-Link2-Pro
Debugger and Programmer
User Manual
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
1INTRODUCTION.......................................................................... 8
Nu-Link2-Pro Features....................................................................... 9
2GETTING STARTED WITH NU-LINK2-PRO....................................... 10
Nu-Link2-Pro Kit Contents..................................................................10
Nu-Link2-Pro PCBA.........................................................................11
Nu-Link2-Pro Overview.....................................................................12
3CONNECTING THE NU-LINK2-PRO................................................ 14
Nu-Link2-Pro Compatible Extension Connectors.......................................14
SWD Interface Pin Definition and Function Connection...............................15
ICE Programming Connection.................................................................... 15
Virtual COM Connection........................................................................... 16
Automatic IC Programming Connection......................................................... 17
Bridge Interface Pin Definition and Function Connection .............................19
UART Connection .................................................................................. 19
I2C Connection ...................................................................................... 20
SPI Connection ..................................................................................... 22
RS-485 Connection................................................................................. 23
CAN BUS Connection.............................................................................. 24
PWM and Capture.................................................................................. 25
ADC Connection .................................................................................... 26
GPIO Connection................................................................................... 27
ETM Interface Pin Definition and Function Connection................................29
SWD Connection ................................................................................... 29
ETM Connection .................................................................................... 30
ICP Offline Programming Function Connection.........................................30
4DEBUGGING AND PROGRAMMING ............................................... 32
Debugging ....................................................................................32
Debug Mode......................................................................................... 32
Breakpoints .......................................................................................... 32
System Viewer ...................................................................................... 32
Semihost ............................................................................................. 34
Embedded Trace Macrocell (ETM) .............................................................. 35
Programming .................................................................................36

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ICP Online Programming.......................................................................... 36
ICP Offline Programming.......................................................................... 36
ISP Online Programming.......................................................................... 37
Software Serial Number (SN)..................................................................... 37
Wide Voltage Programming................................................................38
Installing the Nu-Link2-Pro Driver.........................................................38
5INSTALLATION AND SETUP......................................................... 39
Connecting to the Nu-Link2-Pro...........................................................39
Software Setup...............................................................................40
ICP Tool.............................................................................................. 40
Keil MDK ............................................................................................. 44
IAR EWARM......................................................................................... 53
NuEclipse GCC ..................................................................................... 58
ISP Tool .............................................................................................. 65
More Features of Nu-Link2-Pro Firmware ...................................................... 69
6Appendix.................................................................................. 71
Nu-Link2-Pro Operating Current of ICP..................................................71
Nu-Link2-Pro Operating Current of ISP..................................................72
Automatic IC Programming System ......................................................73
Operation Sequence and Waveform ............................................................ 73
Nu-Link Debugger and Programmer Comparison......................................75
7Revision History ......................................................................... 77

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List of Figures
Figure 2.1-1 Nu-Link2-Pro Full Kit Contents.................................................................................. 10
Figure 2.2-1 Front View of Nu-Link2-Pro PCBA ............................................................................ 11
Figure 2.2-2 Rear View of Nu-Link2-Pro PCBA............................................................................. 11
Figure 2.3-1 Nu-Link2-Pro Connector and Function Overview...................................................... 12
Figure 3.1-1 Pin Definition of Nu-Link2-Pro Connectors................................................................ 14
Figure 3.2-1 SWD Interface Connection Diagram for ICE............................................................. 16
Figure 3.2-2 SWD Interface Connection Diagram for Virtual COM ............................................... 17
Figure 3.2-3 SWD Interface Connection Diagram for Automatic IC Programming........................ 18
Figure 3.3-1 Bridge Interface Connection Diagram for UART....................................................... 20
Figure 3.3-2 Bridge Interface Connection Diagram for I2C............................................................ 21
Figure 3.3-3 Bridge Interface Connection Diagram for SPI ........................................................... 22
Figure 3.3-4 Bridge Interface Connection Diagram for RS-485..................................................... 23
Figure 3.3-5 Bridge Interface Connection Diagram for CAN BUS................................................. 24
Figure 3.3-6 Bridge Interface Connection Diagram for PWM........................................................ 25
Figure 3.3-7 Bridge Interface Connection Diagram for ADC ......................................................... 26
Figure 3.3-8 Bridge Interface Connection Diagram for GPIO........................................................ 27
Figure 3.4-1 ETM Interface Connection Diagram for SWD and ETM Function............................. 30
Figure 3.5-1 ICP Offline Programming Illustration of SWD Interface............................................. 31
Figure 4.1-1 Setting Breakpoints in Keil MDK Debug Mode.......................................................... 32
Figure 4.1-2 System Viewer Control Related Options in Keil MDK Debug Mode ......................... 33
Figure 4.1-3 System Viewer in Keil MDK Debug Mode................................................................. 34
Figure 4.1-4 Semihost Options in Keil MDK Debug Mode............................................................. 35
Figure 4.2-1 Online Programming Flow Diagram .......................................................................... 36
Figure 4.2-2 Offline Programming Flow Diagram .......................................................................... 37
Figure 4.2-3 Software Serial Number (SN) Settings...................................................................... 38
Figure 5.1-1 Nu-Link2-Pro Connection Diagram............................................................................ 39
Figure 5.2-1 Startup Screen of ICP Tool........................................................................................ 40
Figure 5.2-2 ICP Tool Main Window.............................................................................................. 40
Figure 5.2-3 Select One Nu-Link2-Pro........................................................................................... 41
Figure 5.2-4 ICP Tool Programming Options................................................................................. 41
Figure 5.2-5 Nu-Link2-Pro Connected with a Target Chip Detected............................................. 42
Figure 5.2-6 Nu-Link2-Pro Connected with No Target Chip Detected........................................... 42
Figure 5.2-7 Programming File Selection Window......................................................................... 43
Figure 5.2-8 Programming Completion Window............................................................................ 43
Figure 5.2-9 Warning Message of “Device not found” ................................................................... 44

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Figure 5.2-10 Project File Migrate to Version 5 Format................................................................. 44
Figure 5.2-11 Enable Debug Information for Keil MDK ................................................................. 45
Figure 5.2-12 Debugger Setting in Options Window...................................................................... 45
Figure 5.2-13 Programming Setting in Options Window................................................................ 46
Figure 5.2-14 Nu-Link2-Pro Parameter Settings............................................................................ 46
Figure 5.2-15 Keil MDK Programmer Selection............................................................................. 47
Figure 5.2-16 Nu-Link2-Pro Programming Settings....................................................................... 47
Figure 5.2-17 Compile and Download the Project......................................................................... 48
Figure 5.2-18 Keil MDK Debug Mode............................................................................................ 48
Figure 5.2-19 Debug Message on Serial Port Terminal Windows................................................. 49
Figure 5.2-20 Open M480 project.................................................................................................. 49
Figure 5.2-21 Trace Setup with ETM............................................................................................. 50
Figure 5.2-22 Initialize File for Trace Pins ..................................................................................... 50
Figure 5.2-23 Build and Download Windows for ETM................................................................... 51
Figure 5.2-24 Tracing Information Dialog ...................................................................................... 51
Figure 5.2-25 Breakpoint setting and Execution............................................................................ 52
Figure 5.2-26 Options Selection..................................................................................................... 53
Figure 5.2-27 IAR EWARM Target Chip Selection........................................................................ 53
Figure 5.2-28 Set IAR EWARM as Third-Party Driver for Debugger & Programmer .................... 54
Figure 5.2-29 IAR EWARM Programming Settings ....................................................................... 54
Figure 5.2-30 Select.board File for IAR EWARM........................................................................... 55
Figure 5.2-31 Set the Path of the IAR EWARM Debugger Driver Plugin ...................................... 55
Figure 5.2-32 Specify the Port and Target I/O Voltage.................................................................. 56
Figure 5.2-33 Compile and Download the Project......................................................................... 56
Figure 5.2-34 IAR EWARM Debug Mode ...................................................................................... 57
Figure 5.2-35 Debug Message on Serial Port Terminal Windows................................................. 57
Figure 5.2-36 Import the Project in NuEclipse............................................................................... 58
Figure 5.2-37 Import Projects Windows......................................................................................... 58
Figure 5.2-38 Open Project Properties Window ............................................................................ 59
Figure 5.2-39 Project Properties Settings...................................................................................... 59
Figure 5.2-40 Build Project............................................................................................................. 60
Figure 5.2-41 Open Debug Configuration...................................................................................... 61
Figure 5.2-42 Main Tab Configuration ........................................................................................... 61
Figure 5.2-43 Debugger Tab Configuration ................................................................................... 62
Figure 5.2-44 Debugger Tab Configuration ................................................................................... 63
Figure 5.2-45 NuEclipse Debug Mode........................................................................................... 64

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Figure 5.2-46 Debug Message on Serial Port Terminal Windows................................................. 64
Figure 5.2-47 Startup Screen of ISP Tool...................................................................................... 65
Figure 5.2-48 ISP is not connected to any device of ISP Tool ...................................................... 65
Figure 5.2-49 ISP Firmware Sample Code Project........................................................................ 66
Figure 5.2-50 Boot from LDROM Setting in Keil ISP Firmware Project......................................... 67
Figure 5.2-51 Connect to Target Chip with SPI Interface.............................................................. 67
Figure 5.2-52 Select VCOM Port Number with UART Interface.................................................... 68
Figure 5.2-53 Program Data to Target Chip with SPI Interface..................................................... 69
Figure 5.2-54 Update Nu-Link2 Firmware or DUT Firmware......................................................... 70
Figure 6.3-1 SWD Connector Pin Diagrams.................................................................................. 73
Figure 6.3-2 PASS Waveform........................................................................................................ 73
Figure 6.3-3 FAIL Waveform.......................................................................................................... 74

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List of Tables
Table 1.1-1 Nu-Link Debugger/ Programmer Technical Abbreviations........................................... 8
Table 2.3-1 Status LEDs Difference List........................................................................................ 13
Table 3.2-1 SWD Interface Pin Definition and Description............................................................ 15
Table 3.2-2 SWD Interface Corresponding Pin for ICE ................................................................. 16
Table 3.2-3 SWD Interface Corresponding Pin for Virtual COM.................................................... 17
Table 3.2-4 SWD Interface Corresponding Pin for Automatic IC Programming............................ 18
Table 3.3-1 Bridge Interface Pin Definition and Description.......................................................... 19
Table 3.3-2 Bridge Interface Corresponding Pin for UART ........................................................... 20
Table 3.3-3 Bridge Interface Pin for I2C......................................................................................... 21
Table 3.3-4 Bridge Interface Corresponding Pin for SPI ............................................................... 23
Table 3.3-5 Bridge Interface Corresponding Pin for RS-485......................................................... 24
Table 3.3-6 Bridge Interface Corresponding Pin for CAN BUS ..................................................... 25
Table 3.3-7 Bridge Interface Corresponding Pin for PWM ............................................................ 26
Table 3.3-8 Bridge Interface Corresponding Pin for ADC.............................................................. 27
Table 3.3-9 Bridge Interface Corresponding Pin for GPIO ............................................................ 28
Table 3.4-1 ETM Interface Pin Definition and Description............................................................. 29
Table 5.2-1 Debugger Function Settings Description.................................................................... 47
Table 5.2-2 Connection Interface Option of ISP Tool.................................................................... 66
Table 5.2-3 Entering the ISP Conditions for ISP Tool Connection ................................................ 68
Table 6.1-1 Nu-Link2-Pro Operating Current (Online Programming)............................................ 71
Table 6.1-2 Nu-Link2-Pro Operating Current (Offline Programming) of SPI Flash ....................... 71
Table 6.1-3 Nu-Link2-Pro Operating Current (Offline Programming) of USB Flash...................... 71
Table 6.1-4 Nu-Link2-Pro Operating Current (Offline Programming) of Micro SD Card ............... 71
Table 6.2-1 Operating Current of ISP Online Programming.......................................................... 72
Table 6.1-1 Comparison of All Nu-Link Debugger and Programmer............................................. 75
Table 6.1-2 Comparison of Integrated Nu-Link Debugger and Programmer on Development Board
................................................................................................................................................ 76

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1 INTRODUCTION
The Nu-Link2-Pro is a powerful Debugger and Programmer for Nuvoton NuMicro®Family
microcontrollers. The usage of Nu-Link2-Pro can vary from software and hardware development to mass
production.
The Nu-Link2-Pro Debugger and Programmer provides SWD and ETM debugging and emulator support
for the NuMicro®Family microcontrollers. The system can program target chips based on In-Circuit
Programming (ICP) and SWD interface. The NuMicro®Family programming microcontrollers are
supported by a diverse range of IDEs, such as Keil MDK, IAR EWARM, and NuEclipse GCC. With the
Nu-Link2-Pro, users can program and debug directly on IDEs with full access and visibility into the
microcontrollers.
The Nu-Link2-Pro can be used as a mass production programmer for NuMicro®Family microcontrollers.
The programming system is based on In-Circuit Programming (ICP) and SWD interface. The Nu-Link2-
Pro can work with Nuvoton NuMicro®ICP Programming Tool, or serve as a stand-alone ICP
programmer. It also provides a control bus interface that can connect to Automated IC programming
system. The programming process can be triggered by ICP Programming tool, Physical button, or
Automated IC programming system.
The Nu-Link2-Pro is also an In-System Programming (ISP) programmer. It can work with Nuvoton
NuMicro®ISP Programming Tool, or serve as a stand-alone (Offline) ISP programmer. It provides multi-
interfaces bridge, such as UART, RS-485, USB, I²C, SPI, and CAN, to perform ISP function to NuMicro®
Family microcontrollers.
The Nu-Link2-Pro provides a Virtual COM part for a microcontroller to communicate to PC. It also
supports multi-interfaces analyzer function. Nuvoton provides dedicated firmware for Nu-Link2-Pro to
support DAPLink and PyOCD.
For simplicity and clarity, parts of specific terms in this user manual are contracted or abbreviated, as
listed in Table 1.1-1.
Short Name
Full Name
NuMicro®Family
Nuvoton NuMicro®Family
ICP Tool
Nuvoton NuMicro®ICP Programming Tool
Keil MDK
Keil ARM Microcontroller Development Kit (MDK-ARM®)
IAR EWARM
IAR Embedded Workbench for ARM
NuEclipse GCC
NuEclipse Integrated Development Environment
SWD
Serial Wire Debug
ICP
In-Circuit Programming
ISP
In-System Programming
ETM
Embedded Trace Macrocell
Table 1.1-1 Nu-Link Debugger/ Programmer Technical Abbreviations

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Nu-Link2-Pro Features
Supports programming and debugging of all NuMicro®Family microcontrollers
Supports In-Circuit Programming (ICP)
Selectable SWD output voltage (1.8 V / 2.5 V / 3.3 V / 5.0 V)
ICP Programming Tool with image file protection
Drag & drop Flash programming
USB flash drive, SD card and SPI Flash as image file storage
Start button
Automatic IC programming system connector (Control Bus)
Powered by Micro USB or target-powered via SWD interface
Support In-System Programming (ISP)
Via multi-interfaces bridge
Supports PC control ISP
Supports ISP Programming Tool
Supports multi-debug interfaces and tool
Supports Serial Wire Debug (SWD)
Supports high speed up to 96 MHz of Embedded Trace Macrocell (ETM)
Unlimited breakpoint and step execution
Supports Arm DAPLink
Supports PyOCD
Supports multi-interfaces analyzer
SPI, I2C, CAN and RS-485 signal monitor
Supports Multiple bridge connect
multi-interfaces bridge for ISP function (I2C, SPI, CAN, UART, RS-485)
Virtual COM port by USB

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2 GETTING STARTED WITH NU-LINK2-PRO
Nu-Link2-Pro Kit Contents
1. Nu-Link2-Pro
2. USB cable
3. ETM cable
4. SWD cable 5. Bridge cable
Figure 2.1-1 Nu-Link2-Pro Full Kit Contents
Figure 2.1-1 shows the contents of Nu-Link2-Pro full kit:
Nu-Link2-Pro main body (2952mil x 1968mil x 688mil)
USB cable (0.3m, high-speed, Micro-B)
ETM cable (50-mil 20-pin IDC flat cable with 50-mil 20-pin connectors)
SWD cable (100-mil 10-pin squid cable with 10 x 100-mil sockets)
Bridge cable (100-mil 20-pin squid cable with 20 x 100-mil sockets)

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Nu-Link2-Pro PCBA
Main Chip:
M48SKIDAE
ETM Connector
SWD Connector
Bridge Connector
Start Button
Micro SD Card Slot
Micro USB Connector
USB Connector
Figure 2.2-1 Front View of Nu-Link2-Pro PCBA
Figure 2.2-1 shows the main components and connectors from the front side of Nu-Link2-Pro PCBA.
The following lists components and connectors from the front view:
Main Chip: M48SKIDAE
Micro SD Card Slot
Micro USB Connector
USB Connector
Bridge Connector
SWD Connector
Start Button
ETM Connector
Function Switch (Reserve)
Figure 2.2-2 Rear View of Nu-Link2-Pro PCBA
Figure 2.2-2 shows the main components and connectors from the rear side of Nu-Link2-Pro PCBA.
The following lists components and connectors from the rear view:

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Function Switch (Reserved)
Nu-Link2-Pro Overview
Micro SD Card Slot
ICE LED
ICP LED
Green LED
Red LED
ETM Connector
SWD Connector
Start Button
Bridge Connector
USB Connector
Micro USB Connector
Figure 2.3-1 Nu-Link2-Pro Connector and Function Overview
Figure 2.3-1 shows the Nu-Link2-Pro profile and connector overview, the following lists of function brief
description
USB Connector (CON5)
USB Flash Drive for ICP Offline Programming
Micro USB Connector (J2)
Micro USB port of a PC to debug and program target chips through the development
software tool
Bridge Connector (CON6)
UART (Only supports multi-interfaces analyzer related information transmission)
I2C Transmission Interface
SPI Transmission Interface
RS-485 Transmission Interface
CAN BUS Transmission Interface
PWM/Capture
ADC
GPIO
SWD Connector (CON4)
SWD Host Interface
ICP Offline Programming
Virtual COM by UART
Automatic IC Programming

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ETM Connector (CON3)
ETM Interface
SWD Host Interface
Start Button (SW1)
Click this button to proceed with offline programming
Micro SD Card Slot
Save bin file for ICP Offline Programming
Status LED (ICES0, ICES1, ICES2, ICES3)
Display the operation status of the Nu-Link2-Pro
Nu-Link2-Pro Operation Status
Status LED
ICE
ICP
Red
Green
Boot
Flash×3
Flash×3
Flash×3
Flash×3
One Nu-Link2-Pro selected to connect
Flash×3
Flash×3
Flash×3
On
ICE Online (Not connected with a target chip)
On
-
Flash×3
Flash×3
ICE Online (Connected with a target chip)
On
-
-
On
ICE Online (Failed to connect with a target chip)
On
Any
Flash
On
During Offline Programming
-
On
-
Flash
Offline Programming Completed
On
-
-
-
Offline Programming Completed (Auto mode)
On
On
-
-
Offline Programming Failed
On
Flash
-
-
Table 2.3-1 Status LEDs Difference List

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3 CONNECTING THE NU-LINK2-PRO
This chapter introduces how to connect the Nu-Link2-Pro to a computer, and how to connect individual
connectors to development board or products.
Nu-Link2-Pro Compatible Extension Connectors
Figure 3.1-1 shows the Nu-Link2-Pro definition pin of each connector, the Nu-Link2-Pro mainly contains
USB, Micro USB, Bridge interface, ETM interface and SWD interface. User can freely select a suitable
interface for debugger and programmer.
TX
CON6.1 CON6.2 RX
SCL
CON6.3 CON6.4 SDA
SS
CON6.5 CON6.6 CLK
MOSI
CON6.7 CON6.8 MISO
RS485_A
CON6.9 CON6.10 RS485_B
CAN_H
CON6.11 CON6.12 CAN_L
ADC
CON6.13 CON6.14 VCC33
PWM
CON6.15 CON6.16 VCC33
GPIO0
CON6.17 CON6.18 GND
GPIO1
CON6.19 CON6.20 GND
ICE_TX ICE_RX
BUSY START NC PASS FAIL
CON4.2 CON4.4 CON4.6 CON4.8 CON4.10
CON4.1 CON4.3 CON4.5 CON4.7 CON4.9
VCC ICE_DAT ICE_CLK nRESET GND
SWDIO SWDCLK NC NC nRESET TRACECLK
TRACEDATA[0]
TRACEDATA[1]
TRACEDATA[2]
TRACEDATA[3]
CON3.2 CON3.4 CON3.6 CON3.8 CON3.10 CON3.12 CON3.14 CON3.16 CON3.18 CON3.20
CON3.1 CON3.3 CON3.5 CON3.7 CON3.9 CON3.11 CON3.13 CON3.15 CON3.17 CON3.19
VCC33 GND GND KEY GNDDetect GND NC NC GND GND
USB Host: USB flash disk off-line programming.
USB Device: Connect to PC.
ETM Connector
SWD Connector
Bridge Connector
Figure 3.1-1 Pin Definition of Nu-Link2-Pro Connectors

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SWD Interface Pin Definition and Function Connection
Table 3.2-1 shows SWD interface pin definition and description. The Nu-Link2-Pro provides a SWD
interface connector with a 100-mil 10-pin cable. The SWD supports ICE Programming, Virtual COM and
automatic IC Programming. The following sections will introduce the definition of the SWD interface pin
and the connection of each function.
Pin Name
Pin Number
Pin Description
VCC
CON4.1
Target Board voltage supply. The Nu-Link2-Pro supports the wide
voltage programming function, by ICP tool can adjust the SWD port
voltage as 1.8V, 3.3V, 2.5V or 5.0V. For detailed adjustmentmethod,
please refer to section 4.3.
BUSY
CON4.2
“BUSY” is Control Bus signals for IC Programmer. For details,
please refer to section 6.3.
ICE_DAT
CON4.3
Serial Wired Debugger Data pin
START
CON4.4
“START” is Control Bus signals for IC Programmer. For details,
please refer to section 6.3.
ICE_CLK
CON4.5
Serial Wired Debugger Clock pin
NC
CON4.6
NC
/RESET
CON4.7
IC reset pin, Nu-Link2-Pro will automatically reset the target IC
during the programming process.
PASS/TX
CON4.8
“PASS” is Control Bus signals for IC Programmer. For details,
please refer to section 6.3.
GND
CON4.9
Ground
FAIL/RX
CON4.10
“FAIL” is Control Bus signals for IC Programmer. For details,
please refer to section 6.3.
Table 3.2-1 SWD Interface Pin Definition and Description
ICE Programming Connection
The Nu-Link2-Pro provides ICE function to Programming and debugging on PC. The ICE connection
pins are VCC(CON4.1), ICE_DAT(CON4.3), ICE_CLK(CON4.5), /RESET(CON4.7) and VSS(CON4.9).
Figure 3.2-1 presents how to connect the target board to use ICE and Table 3.2-2 shows the pin
corresponding to the target board.

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SWD Micro USB
NuMicro® Family
Target Board
ICE_DAT
ICE_CLK
/RESET
VSS(GND)
VCC
START
NC
PASS/RX
FAIL/TX
BUSY
Figure 3.2-1 SWD Interface Connection Diagram for ICE
Pin Name
Pin Number
Pin Corresponding to the Target Board
VCC
CON4.1
VCC
ICE_DAT
CON4.3
ICE_DAT
ICE_CLK
CON4.5
ICE_CLK
/RESET
CON4.7
/RESET
VSS(GND)
CON4.9
VSS(GND)
Table 3.2-2 SWD Interface Corresponding Pin for ICE
Virtual COM Connection
The Nu-Link2-Pro provides virtual COM port (VCOM) function to print out messages on PC, and the
Virtual COM transmission data by UART0. The connection pins are VCC (CON4.1), VSS (CON4.9), TX
(CON4.8) and RX (CON4.10). Figure 3.2-2 presents how to connect the target board to use VCOM and
Table 3.2-3 shows the pin corresponding to the target board.

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SWD Micro USB
NuMicro® Family
Target Board
ICE_DAT
ICE_CLK
/RESET
VSS(GND)
VCC
START
NC
PASS/RX
FAIL/TX
BUSY
Figure 3.2-2 SWD Interface Connection Diagram for Virtual COM
Pin Name
Pin Number
Pin Corresponding to the Target Board
VCC
CON4.1
VCC
PASS/TX
CON4.8
UART_RX
VSS(GND)
CON4.9
VSS(GND)
FAIL/RX
CON4.10
UART_TX
Table 3.2-3 SWD Interface Corresponding Pin for Virtual COM
Automatic IC Programming Connection
The Nu-Link2-Pro provides Automatic IC Programming function to mass production. The Automatic IC
Programming connection pins are VCC (CON4.1), VSS (CON4.9), BUSY (CON4.2), START (CON4.4),
PASS (CON4.8) and FAIL (CON4.10). Figure 3.2-3 presents how to connect the target board to use
Automatic IC Programming and Table 3.2-4 shows the pin corresponding to the target board.

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SWD Micro USB
NuMicro® Family
Target Board
ICE_DAT
ICE_CLK
/RESET
VSS(GND)
VCC
START
NC
PASS/RX
FAIL/TX
BUSY
Figure 3.2-3 SWD Interface Connection Diagram for Automatic IC Programming
Pin Name
Pin Number
Pin Corresponding to the Target Board
VCC
CON4.1
VCC[1]
BUSY
CON4.2
BUSY
START
CON4.4
START
PASS
CON4.8
PASS
VSS(GND)
CON4.9
VSS(GND)
FAIL
CON4.10
FAIL
Note:
1. The target board power setting should be the same as Nu-Link2-Pro.
Table 3.2-4 SWD Interface Corresponding Pin for Automatic IC Programming

Nu-Link2-Pro Debugger and Programmer
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NU-LINK2-PRO DEBUGGER and PROGRAMMER USER MANUAL
Maker Nu-mbed NUC472 User Manual
Bridge Interface Pin Definition and Function Connection
Table 3.3-1 shows the bridge interface pin definition and description. The Nu-Link2-Pro provides a
bridge interface connector with a 100-mil 20-pin cable. The bridge interface supports one channel
UART, I2C, SPI, RS-485, CAN BUS, ADC, PWM and two GPIOs. The following sections will introduce
the definition of the bridge interface pin and the connection of each function.
Pin Name
Pin Number
Pin Description
TXD
CON6.1
Data transmitter output pin for UART
RXD
CON6.2
Data receiver input pin for UART
SCL
CON6.3
I2C clock
SDA
CON6.4
I2C data input/output
SS
CON6.5
SPI slave select
CLK
CON6.6
SPI serial clock
MOSI
CON6.7
SPI MOSI (Master Out, Slave In)
MISO
CON6.8
SPI MISO (Master In, Slave Out)
RS-485A
CON6.9
RS-485 Data plus signal
RS-485B
CON6.10
RS-485 Data minus signal
CANH
CON6.11
CAN BUS Data plus signal
CANL
CON6.12
CAN BUS Data minus signal
ADC
CON6.13
ADC analog input signal
VCC33
CON6.14
Target Board voltage supply. The Nu-Link2-Pro Bridge VCC
only support 3.3V.
PWM
CON6.15
PWM output/Capture input
VCC33
CON6.16
Target Board voltage supply. The Nu-Link2-Pro Bridge VCC
only support 3.3V.
GPIO0
CON6.17
General Purpose I/O 0
GND
CON6.18
Ground
GPIO1
CON6.19
General Purpose I/O 1
GND
CON6.20
Ground
Table 3.3-1 Bridge Interface Pin Definition and Description
UART Connection
The Nu-Link2-Pro provides one channel UART function for monitor mode print out information. This
information is received from I2C, SPI, RS-485 or CAN BUS. The UART connection pins are VCC33
(CON6.14 and CON6.16), VSS(CON6.18 and CON6.20), TXD(CON6.1) and RXD(CON6.2). Figure
3.3-1 presents how to connect the target board to use UART function and Table 3.3-2 shows the pin

Nu-Link2-Pro Debugger and Programmer
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NU-LINK2-PRO DEBUGGER and PROGRAMMER USER MANUAL
Maker Nu-mbed NUC472 User Manual
corresponding to the target board.
Bridge
Micro USB
SCL
SS
TXD
RS485A
MOSI
CNAH
GPIO1
ADC
GPIO0
PWM
SDA
CLK
RXD
RS485B
MISO
CNAL
VSS(GND)
VDD33
VSS(GND)
VDD33
NuMicro® Family
Target Board
Figure 3.3-1 Bridge Interface Connection Diagram for UART
Pin Name
Pin Number
Pin Corresponding to the Target Board
TXD
CON6.1
RXD[1]
RXD
CON6.2
TXD[1]
VCC33
CON6.14
VCC[1]
VCC33
CON6.16
VCC[1]
VSS(GND)
CON6.18
VSS(GND)
VSS(GND)
CON6.20
VSS(GND)
Note:
1. The target board power and signal only supports 3.3V at Nu-Link2-Pro Bridge interface.
Table 3.3-2 Bridge Interface Corresponding Pin for UART
I2C Connection
The Nu-Link2-Pro provides one channel I2C function for monitor mode receive information, and print out