Description

When using the index pulse to reset the counter with the following configuration in the QEI Control (QEICTL) register:

• SIGMODE is 0 indicating quadrature mode
• CAPMODE is 1 indicating both PhA and PhB edges are counted

and the following initial conditions:

• Both PhA and PhB are 0
• The next quadrature state is in the counterclockwise direction

the QEI interprets the state change as an update in the clockwise direction, which results in a position mismatch of 2.

Workaround

None.