Chapter 2 External I/O Specification Minimum interval between input pulse signals As shown below, the interval between input pulse signals that can be received should be 50 ms or more. Proper operation cannot be guaranteed if the input pulse signal is less than 50 msec. Min. 50 msec Level signal A level signal is a signal that maintains a Low and/or High state for a certain length of time, and refers to the time during which that state is maintained. A Low active level signal changes from High to Low, and the time during which it maintains the Low state is the active state.
A High active level signal changes from Low to High, and the time during which it maintains the High state is the active state. If both Low and High are significant, both the Low state and the High state are each maintained for a certain length of time. 2 Minimum time input level signals that can be received are maintained As shown below, input level signals that can be received must be maintained for 30 msec or more. Min. 30 msec 11 Proper operation cannot be guaranteed.