53.6.2.6.3 Direction Status and Change Detection

The direction (DIR) status can be directly read anytime in the STATUS register (STATUS.DIR). The polarity of the direction flag status depends of the input signal swap and active level configuration.

Each time a rotation direction change is detected, the Direction Change Interrupt Flag is set (INTFLAG.DIR) and an optional interrupt can be generated. The same interrupt condition is source of Direction event output.

To avoid spurious interrupts when coding wheel is stopped, the direction change condition is reported as an interrupt, only on the second edge confirming the direction change.

Velocity output event is generated on each QDEC transition except when the direction changes.