External warm reset can only be used as input only to AM335x or output only to reset other devices as written in second last line of section 8.1.1.7.4.1 (External Warm Reset) of TRM of AM335x. But in in the next section figure shows that it can be implemented in both style at same time and same approach is also followed in EVK and Beagle Bone. Is there any problem in my understanding?