SFFS222 October 2023 TMS320F2800153-Q1 , TMS320F2800154-Q1 , TMS320F2800155-Q1 , TMS320F2800156-Q1 , TMS320F2800157 , TMS320F2800157-Q1
Some modules include features to support avoidance of unintentional control register update. Implementation of multi-bit keys for critical control registers is one such feature (for example, EPWM_REGS.EPWMLOCK and so forth). The multi-bit keys are particularly effective for avoiding unintentional activation. For more details on the registers for which the diagnostic is applicable, see the device-specific technical reference manual. The operation of this safety mechanism is continuous and cannot be altered by the software. This mechanism can be tested by generating software transactions with and without correct keys and observing the updated register value.