omapl138. Entering DEEPSLEEP mode by pressing button

Hello,

I've got a question - can I transfer OMAP to DEEPSLEEP mode by pressing LCDK button (user 1 or user 2)?

I found three ways to enter DEEPSLEEP mode at spruh77a.pdf document. By handshaking (10.10.4.1), by externally controller (10.10.1.1) and by timer. I think that last way isn't my decision at all.

As I understand this buttons are on GPIO2[5] pins, but I don't know about communication this GPIO pins and this entering DEEPSLEEP mode algorithms. Can Ido itat all?

Regards,

Alexander.