SNIU028D February 2016 – September 2020 UCD3138 , UCD3138064 , UCD3138064A , UCD3138128 , UCD3138A , UCD3138A64
DPWMCYCADJA and DPWMCYCADJB are registers that are added to the Filter Duty before the DPWM pulse width is calculated. They have different effects in different modes, see the DPWM Mode sections above. They are signed high resolution registers so that the duty can be increased or decreased from the Filter value. They only have 16 bits, so they cannot adjust the full 18 bit range of the DPWM. But their range is still +-8 milliseconds, which is typically more than a whole switching period
High resolution is 250 picosec, and the range of a signed 16 bit value is ±215. So