LOCUS is the name of MT3339 innate logger solution, the embedded logger function don't need host CPU(MCU) and external flash to handle the operation, GPS engine will use internal flash(embedded in GPS chipset) to log the GPS data(Data format: UTC, Latitude, Valid, Checksum).
Logger capability in MT3339 internal flash(64KB): - Smart overlapping mechanism to keep latest logger data(4KB base), user can log >16 hours. - With AlwaysLocateTM mode, user can log up 48 hours(2 days) under standard scenario.