SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
When DPLL_SATA finishes calibration and lock sequences it enters the LOCKED state. During the LOCKED state, LOSSREF is deasserted, BYPASSACK is deasserted, and the FREQLOCK or PHASELOCK signals are asserted.
DPLL lock event criteria (FREQLOCK or PHASELOCK) is software selectable through the DPLLCTRL_SATA.PLL_CONFIGURATION2[10:9] PLL_LOCKSEL bit field.
The DPLL indicates it is in the LOCKED state to the DPLLCTRL_SATA, SATA controller core controller, and SATA_PHY through assertion of the DPLL_LOCK signal, which reflects the internal lock loop status. The user software can monitor the DPLL locked event in the DPLLCTRL_SATA.PLL_STATUS[1] PLL_LOCK bit, which is active high.