Memory management method, memory storage device and memory control circuit unit

A memory storage device, comprising:

• a connection interface unit, configured to be coupled to a host system;
• a rewritable non-volatile memory module;
• and
• a memory control circuit unit, coupled to the connection interface unit and the rewritable non-volatile memory module,
• wherein the memory control circuit unit is configured to receive a plurality of commands from the host system,
• wherein the memory control circuit unit is further configured to count a newest idle time corresponding to the commands and a past average command-receiving-time-interval corresponding to the commands,
• wherein the memory control circuit unit is further configured to dynamically switch a work mode of the memory storage device from a first work mode to a second work mode if the newest idle time is greater than a first threshold value and the past average command-receiving-time-interval is greater than a second threshold value,
• wherein the memory control circuit unit is further configured to maintain the work mode of the memory storage device in the first work mode if the newest idle time is not greater than the first threshold value or the past average command-receiving-time-interval is not greater than the second threshold value,
• wherein a power consumption of the memory storage device operated in the first work mode is higher than a power consumption of the memory storage device operated in the second work mode.

A memory control circuit unit, for controlling a memory storage device comprising a rewritable non-volatile memory module, and the memory control circuit unit comprising:

• a host interface, configured to be coupled to a host system;
• a memory interface, configured to be coupled to the rewritable non-volatile memory module;
• a counting circuit;
• a work mode controller;
• and
• a memory management circuit, coupled to the host interface, the memory interface, the counting circuit and the work mode controller,
• wherein the memory management circuit is configured to receive a plurality of commands from the host system,
• wherein the counting circuit is configured to count a newest idle time corresponding to the commands and a past average command-receiving-time-interval corresponding to the commands,
• wherein the work mode controller is configured to dynamically switch a work mode of the memory storage device from a first work mode to a second work mode if the newest idle time is greater than a first threshold value and the past average command-receiving-time-interval is greater than a second threshold value,
• wherein the work mode controller is further configured to maintain the work mode of the memory storage device in the first work mode if the newest idle time is not greater than the first threshold value or the past average command-receiving-time-interval is not greater than the second threshold value,
• wherein a power consumption of the memory storage device operated in the first work mode is higher than a power consumption of the memory storage device operated in the second work mode.