Nuvoton NuMicro ISP User manual

ISP Programming Tool
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ISP PROGRAMMING TOOL USER MANUAL
ARM®Cortex®- M
32-bit Microcontroller
NuMicro® ISP Programming Tool
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
1Overview.............................................................................................3
2Using the ISP Programming Tool in Windows.................................................4
2.1 Connecting Interface Selection...................................................................... 4
2.2 Connecting Interface via Nu-Link2.................................................................. 4
2.3 Connecting to the target chip ........................................................................ 5
2.4 Load File ................................................................................................ 6
2.5 Setting the User Configuration Bits ................................................................. 7
2.6 Programming Options................................................................................. 8

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1 OVERVIEW
The NuMicro®Family microcontroller (MCU) supports In-System-Programming (ISP) function
allowing the embedded Flash memory to be reprogrammed under software control. ISP is
performed without removing the microcontroller from the system through the firmware and on-chip
connectivity interface, such as UART, USB, I²C, SPI, and CAN.
Before using the ISPTool, user needs to program the ISP code into LDROM by using a universal
programmer or Nuvoton’s NuMicro®ICP Programming Tool, and the User Configuration bit ‘CBS’
configured as Boot from LDROM.
ISP code can be found in the board support package (BSP). Take M480BSP for example, we
supplied ISP_CAN, ISP_HID, ISP_HID_20, ISP_I2C, ISP_RS485, ISP_SPI and ISP_UART
samples as shown in the following link.
https://github.com/OpenNuvoton/M480BSP/tree/master/SampleCode/ISP
The ISPTool repository is available on GitHub, GITEE and GitLab.
Please check the following link to get the latest update.
https://github.com/OpenNuvoton/ISPTool
https://gitee.com/OpenNuvoton/ISPTool
https://gitlab.com/OpenNuvoton/nuvoton-tools/ISPTool

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2 USING THE ISP PROGRAMMING TOOL IN WINDOWS
The ISP Programming Tool is contained in the folder [Application Program].
2.1 Connecting Interface Selection
User needs to select the ISP connection interface before using the ISP function and makes sure
the IO pins used for communication are connected correctly. For USB interface, an extra entry pin
must be tied to ground pin to enter ISP mode.
Figure 2-1 Connection via USB Interface
Figure 2-2 Connection via UART Interface using specific COM port
2.2 Connecting Interface via Nu-Link2
Since version 3.00, there are more connecting interfaces available for customer’s product
decision. A Nu-Link2 adapter is necessary to use these interface.
Figure 2-3 Connection Interface via NuLink2 ISP-Bridge functionality

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Figure 2-4 Main Dialog
2.3 Connecting to the target chip
After clicking the “Connect”button, the ISP tool will keep trying to connect to a target board every
40 mini seconds until the target board is successfully connected or the “Stop”button is clicked. If
there is no response from the target board during connection, please reset the MCU to execute
the ISP code.

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2.4 Load File
Click the “APROM”or “Data Flash”button to select the image from the pop-up window. Or using
drag & drop function from Windows Explorer to select the image file.
Figure 2-5 Click Button to Load Image file
Figure 2-6 Drag image file from explorer window

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2.5 Setting the User Configuration Bits
After clicking the “Setting”button, a “User Configuration”dialog will open to display all User
Configuration settings. The corresponding “User Configuration”dialog will be displayed
according to the MCU currently connected. Figure 2-7 shows the “User Configuration”setting of
the NUC123AN series MCU.
The ISP tool does not allow user to modify target board boot selection, either. The “Boot Select”
shown in the User Configuration form is for informative purpose only. This setting can be updated
with Nuvoton’s NuMicro®ICP Programming Tool.
Figure 2-7 User Configuration Dialog

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2.6 Programming Options
The following table lists the ISP actions for different programming options.
Programming Options
ISP Actions
APROM
APROM will be updated.
Data Flash
Data Flash will be updated.
Config
User Configuration will be updated while target chip is
not in write protected mode.
1. User Configuration is in write protected mode when
security lock is enabled.
2. Program APROM or Erase All option can remove
write protection of User Configuration.
Note: Any change on User Configuraion block will take
effect after system reboot.
Erase All
APROM and Data Flash will be erased.
The Security Lock in User Configuration will be
disabled.
Reset and Run
The system reset is issued and the chip is running user
application on APROM.
Table 2-8 ISP Programming Options

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Important Notice
Nuvoton Products are neither intended nor warranted for usage in systems or equipment, any
malfunction or failure of which may cause loss of human life, bodily injury or severe property
damage. Such applications are deemed, “Insecure Usage”.
Insecure usage includes, but is not limited to: equipment for surgical implementation, atomic
energy control instruments, airplane or spaceship instruments, the control or operation of
dynamic, brake or safety systems designed for vehicular use, traffic signal instruments, all
types of safety devices, and other applications intended to support or sustain life.
All Insecure Usage shall be made at customer’s risk, and in the event that third parties lay
claims to Nuvoton as a result of customer’s Insecure Usage, customer shall indemnify the
damages and liabilities thus incurred by Nuvoton.