SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
In manual mode (PLL_CONTROL[0] PLL_AUTOMODE = 0), it is possible to update the configuration values of HSDIVIDER without starting the DPLL locking sequence. Once all the configuration values have been programmed into the registers, the PLL_GO[1] HSDIVLOAD bit must be set. The TENABLEDIV output is driven high for six SCP clock periods while the TINITZ and TENABLE signals remain unchanged. The HSDIVLOAD bit is cleared at the end of the sequence.
The SCPBUSY signal is high during the sequence until the HSDIVLOAD bit is cleared, thus indicating that there is pending activity in the SCPClk domain. SCPClk must be kept running while this signal is asserted.
The HSDIVIDER sequence and the GO sequence cannot be performed at the same time. If one of the two sequences is running and the trigger bit of the other sequence is set, PLLCTRL finishes the first sequence and then immediately starts the other sequence.