Attention to Internet Explorer users: ROHM website does not recommend browsing in IE 11. Please use latest browser to ensure the best performance on ROHM website.
The software package of the development environment (Development Tools LEXiDE-Ω) contains "nX-U8/100 Core Instruction Manual" and "nX-U16/100 Core Instruction Manual" which describe CPU instructions. You can download the software package from the support contents of the general-purpose 16-bit microcontroller page on our product site.