Reference frequency setting method, memory controller, and flash memory storage apparatus

A memory controller, for setting a reference frequency of a flash memory storage apparatus, wherein the flash memory storage apparatus comprises a flash memory module and an oscillator circuit, the memory controller comprising:

• a memory interface, coupled to the flash memory module;
• a memory management circuit, coupled to the memory interface;
• and
• a storage unit, coupled to the memory management circuit,
• wherein the memory management circuit determines whether a setting code is stored in the flash memory module or the storage unit in order to determine whether to generate the setting code, and the setting code comprises information of the reference frequency;
• and
• if the setting code is stored in the flash memory module or the storage unit, the memory management circuit reads the setting code to allow the oscillator circuit to generate the reference frequency according to the setting code, wherein the oscillator circuit does not include a crystal and does not receive a clock signal generated from a crystal oscillator;
• and
• if the setting code is not stored in the flash memory module or the storage unit, the memory management circuit generates the setting code through a host removeably coupled with the flash memory storage apparatus and stores the setting code into the flash memory module or the storage unit.

A flash memory storage apparatus, comprising:

• an oscillator circuit, configured to generate a reference frequency according to a setting code;
• a flash memory module, configured to store the setting code;
• and
• a memory controller, coupled to the oscillator circuit and the flash memory module, the memory controller comprising a storage unit,
• wherein the memory controller determines whether the setting code is stored in the flash memory module or the storage unit in order to determine whether to generate the setting code, and the setting code comprises information of the reference frequency;
• and
• if the setting code is stored in the flash memory module or the storage unit, the memory controller reads the setting code to allow the oscillator circuit to generate the reference frequency according to the setting code, wherein the oscillator circuit does not include a crystal and does not receive a clock signal generated from a crystal oscillator;
• and
• if the setting code is not stored in the flash memory module or the storage unit, the memory controller generates the setting code through a host removeably coupled with the flash memory storage apparatus and stores the setting code into the flash memory module or the storage unit.