SPRUIZ1B July 2023 – August 2024 TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1
The QEP Mode Adapter (QMA) is designed to extend the C2000™ eQEP module capabilities to support the additional modes described. Figure 23-22 depicts how the QMA module is integrated into to the eQEP module.
At reset, by default QMA logic is bypassed and the EQEPA and EQEPB inputs from the pins go directly into the eQEP module. When QMA module is enabled by configuring the QMACTRL[MODE] register, the EQEPA and EQEPB input are processed by this module and modified version of EQEPA and EQEPB signals are sent to the eQEP module. The QMA module requires the eQEP module to be configured in the Direction-Count mode and generates a clock signal on EQEPA input and direction signal on EQEPB input as needed for the proper operation of the intended mode.
The QMA module has error detection logic to detect illegal transitions on EQEPA and EQEPB input signals. The QMA module’s error and interrupt are integrated inside the eQEP module as described in Section 23.10. In addition, the QMACTRL register configuration can be locked using the QMALOCK register. Refer to the register description for more details.