When do I need to include armv7? Can I build for iOS5 devices too using only armv6?

Question

I am making a game that I want compatible for all older devices to as long as they all run on iOS4.0 or above. I do have some features specific for iOS5.

Now while making the build should i use both armv6 as well as armv7 architectures or can I just use armv alone? I am using xcode 4.2

Any explanation regarding this would be much appreciated. While I do know how to make it compatible for older devices I need some clarifications on when armv7 is required.

Thanks in advance.

Answer 1

armv7 is for iPad, iPad 2, iPhone 3GS, iPhone 4, and iPhone 4s.