Method for performing data protection control of memory device with aid of selective soft-bit transmission, and associated apparatus

A memory controller, for performing enhanced data protection of a memory device with aid of selective soft-bit transmission, the memory device comprising the memory controller and a non-volatile (NV) memory, the NV memory comprising at least one NV memory element, the at least one NV memory element comprising a plurality of blocks, the memory controller comprising:

• a processing circuit, arranged to control the memory controller according to a plurality of host commands from a host device, to allow the host device to access the NV memory through the memory controller;
• wherein:
• the memory controller is arranged to send at least one read command as well as a controller-side indication, the controller-side indication for selectively enabling the selective soft-bit transmission at the NV memory, to the NV memory for obtaining soft-decoding information regarding a first page within a first block among the plurality of blocks, wherein the first page is arranged to store first data;
• and
• the memory controller is arranged to receive the soft-decoding information as well as a memory-side indication from the NV memory, for performing soft-decoding according to the soft-decoding information to obtain the first data from the soft-decoding, wherein the memory-side indication at a first cycle is arranged to indicate whether the NV memory is going to transmit at least one soft bit at a second cycle, the second cycle coming after the first cycle.