SLAU846B June 2023 – November 2024 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G3105 , MSPM0G3106 , MSPM0G3107 , MSPM0G3505 , MSPM0G3506 , MSPM0G3507
In TIMGx instances with QEI support, Quadrature Encoder Interface (QEI) mode provides an interface to the output of a quadrature encoder. It decodes the quadrature encoded data to provide the information on the relative positioning and movement of a linear or rotary motion.
The QEI consists of two Gray coded quadrature input signals PHA and PHB, and an index input signal IDX. All input signals go to CCP inputs of a single counter, such that PHA and PHB are mapped to CCP0 and CCP1, and IDX is brought in as a separate input. An error detection mechanism can report erroneous transitions to avoid improper signal decodings.
See Section 27.1.3 and the device-specific data sheet for TIMG instances that support QEI / Hall Input Mode.