Hello, there is only one version, I suggest reviewing the next information on the page.
LPC2144FBD64 Product Information|NXP
Best regards,
Pavel
Hello, my name is Pavel, and I will be supporting your case, I review your information, but this does not have enough details, if you are looking to flash your MCU I recommend using a debugger, like the MCU Link.
MCU Link JTAG/SWD Debug Probe | NXP Semiconductors
Best regards
Pavel
Hello, I understand maybe you could try with BLHOST read memory command.
Best regards,
Pavel
Hello, if you have a custom board, you may need an external debugger and put the LPC in ISP mode.
Best regards,
Pavel
Hello, when you have the MCU connected to the PC, you may need to install the spsdk or blhost.
Then you can read the memory.
Best regards,
Pavel