topic Re: LPCXpresso 11U68 board: when put into ISP mode it appears as a USB mass storage in LPC Microcontrollers

LPCXpresso 11U68 board: when put into ISP mode it appears as a USB mass storage

sharadanand — Sun, 04 Jan 2026 14:03:32 GMT

I have purchased a new LPCXpresso 11U68 board and I am able to put into ISP mode. But after putting it into ISP mode it is getting detected as a mass storage device with title "CRP DISABLED".

I tried to update its driver wot other driver but was not able to flash my application into it.

Re: LPCXpresso 11U68 board: when put into ISP mode it appears as a USB mass storage

Alice_Yang — Mon, 05 Jan 2026 03:58:59 GMT

Hello @sharadanand

Please provide detailed steps on how you put your board into ISP mode.

Also, please check the LPCXpresso11U68 schematic and the description below about entering ISP mode, and confirm.

Thank you.

Alice

Re: LPCXpresso 11U68 board: when put into ISP mode it appears as a USB mass storage

sharadanand — Mon, 05 Jan 2026 13:52:12 GMT

Hi @al ,

Thank you very much for the reply I am refering following schematic file:

https://www.nxp.com/downloads/en/schematics/LPC11U68_Xpresso_v2_Schematic_RevC_1.pdf

I am setting JP2 pin 1 and 2 short and JP1 as open, I am pressing reset button and holding the ISP button while board is resetting. As per my understing of the schematic, this should automatically go into USB mode. I have not made any changes in the board and the board is brand new,

Warm regards,
Sharadanand Karanjkar

Re: LPCXpresso 11U68 board: when put into ISP mode it appears as a USB mass storage

Alice_Yang — Tue, 06 Jan 2026 04:06:07 GMT

Hi @sharadanand

"I am setting JP2 pin 1 and 2 short and JP1 as open, I am pressing reset button and holding the ISP button while board is resetting. As per my understing of the schematic, this should automatically go into USB mode."

->>

Yes, you are correct. In this mode, the bootloader connects the device to the PC host as an MSC USB device (CRP DISABLED). The device’s flash memory appears as a drive in the host operating system, allowing you to simply drag and drop your .bin file into the MSC device.

Thank you.

Alice

Re: LPCXpresso 11U68 board: when put into ISP mode it appears as a USB mass storage

sharadanand — Tue, 06 Jan 2026 16:12:06 GMT

Hi @Alice_Yang ,

Thank you very much for your response, I want to flash and debug my firmware via the debugger provided on the board.

I am not able to do that, LPCXPresso IDE generates *.axf file not bin file. How to move further with this?

Warm regards,

Sharadanand

Re: LPCXpresso 11U68 board: when put into ISP mode it appears as a USB mass storage

sharadanand — Tue, 06 Jan 2026 17:07:39 GMT

I found out the way to generate firmware.bin file but still unable to make the debugger working. Kindly let me know how to enable the debugger.

Re: LPCXpresso 11U68 board: when put into ISP mode it appears as a USB mass storage

Alice_Yang — Wed, 07 Jan 2026 04:03:39 GMT

Hello @sharadanand

If you want to use the debugger for debugging, do not put the chip into ISP mode. Connect to the debug port (J5) without pressing the ISP button.

Thank you.

Alice

Re: LPCXpresso 11U68 board: when put into ISP mode it appears as a USB mass storage

sharadanand — Wed, 07 Jan 2026 11:08:11 GMT

Hi @Alice_Yang ,

Thanks a lot for clarifying :). I was confused about the same, I have tried that before but I am not able to detect the debugger to my host machine.

This is what I see on MCUXpresso, I tried to find out the device details they are as follows:
vid:0x1fc9
pid:0x000c

Manufacturer: NXP
Serialnumber: ABCD

I tried using both windows and linux hosts, buit I was not successful.
I followed the steps mentioned in the link bellow:

https://community.nxp.com/t5/MCUXpresso-IDE/MCUExpresso-with-LPC-Link2/td-p/633989

But that also did not worked for me.

Warm regards,

Sharadanand

Re: LPCXpresso 11U68 board: when put into ISP mode it appears as a USB mass storage

sharadanand — Wed, 07 Jan 2026 19:36:27 GMT

Hi @Alice_Yang ,

I was able to connect the debugger successfully. Thank you very much for the support,

Warm regards,

Sharadanand