BUFFER MEMORY ACCESSING METHOD, MEMORY CONTROLLER AND MEMORY STORAGE DEVICE

摘要

A method for accessing a buffer memory in a memory storage device is provided, wherein the buffer memory, which has a plurality of write buffer units, is equipped in the memory storage device having a rewritable non-volatile memory module. The method includes: receiving a write data from a host system and determining whether the number of used write buffer unit is smaller than a predefined value or not. The method also includes: if the number of the used write buffer unit is not smaller than the predefined value, temporarily storing the write data into one of the write buffer unit which is not being used and transmitting a confirmation message corresponding to the write data to the host system after a predefined time interval. Therefore, the method can reduce the latency of write operations of the host system.

主权项

1. A buffer memory accessing method, suitable for a buffer memory of a memory storage device, wherein the memory storage device comprises a rewritable non-volatile memory module, wherein the buffer memory has a plurality of write buffer units, the buffer memory accessing method comprising:
receiving a write data from a host system; determining whether a number of used write buffer units of the write buffer units is not smaller than a predefined value; temporarily storing the write data to one of the write buffer units that is not being used and transmitting a confirmation message corresponding to the write data to the host system if the number of the used write buffer units of the write buffer units is smaller than the predefined value; and temporarily storing the write data to one of the write buffer units that is not being used and transmitting the confirmation message corresponding to the write data to the host system after a predefined time interval if the number of the used write buffer units of the write buffer units is not smaller than the predefined value.