Finaly got a 360 controller...

[ZeroX4]

1st of all u dont need to even touch this settings to play on ppsspp

2nd most of them are for ppl that have problems with controllers or want to do some tweaking

so deadzone its exactly what it means a deadzone for analog movement radius

so like if u make bigger radius u will need to move analog stick more away form center for emulator to even register a move

in short of it its option for ppl who have tooooooo sensitive controllers or other way around

analog mapper mode i dont have even idea what it is but trust me u dont need to touch any of this just configure ur controls and dont care