That sounds a bit as to use some program-logic and/or a control register to accomplish your task. When you are a bit more specific or even upload your complete project here and telling us which device of the PSoC family you are working with (have you got a development kit? Which one??) we might be able to help you instantly.
Can you tell us why you want to hide it?
Do you want to use software to start the conversion? or you want to use hardware SOC sometimes and software SOC some other times?
Kinnitchiwa ???-san! I have to admit that I am natively neiter Japanese nor English-speaking, so I have troubles with either language (smile)
In the datasheet (near the beginning) is usually a list of the I/O-ports of a usermodue. There are hints which ports may be hidden and if so, which settings will hide or show them. Yes, datasheets are written mostly in english, but there might be a translator for your native language (which is it?) to be found in the web or a friend / colleague may help you in translating.
Google translator fairly effective. I was able to communicate with a Chinese engineer
using their tool. Not 100% but good enough.
Foxit reader, pdf files, allows you to cut and paste text and images out of pdf
docs, and its free.
Other thean English, I think Japanese and Chinese are the two most used language for Cypress documentation.
If you think there are issues with the documentation in Japanese, I think you should contact Cypress Japan office and ask them to improve it.