Memory addressing methods and associated controller, memory device and host

A method for an electronic device to access an SD card, the electronic device comprising:

• an I/O interface comprising:
• a voltage supply contact for providing voltage supply to the SD card;
• at least one ground contact;
• a clock contact for providing a clock signal to the SD card;
• a command contact for providing a command to the SD card;
• and
• four data contacts for writing data into the SD card or reading data from the SD card;
• and
• the method comprising:
• transmitting, via the command contact, an address extension command including a first address to the SD card;
• transmitting, via the command contact, an access command including a second address to the SD card;
• and
• accessing at least a memory location of the SD card indicated by a third address, which is a combination of the first address and the second address;
• wherein the access command indicates an access operation to be performed on the SD card selected from:
• a single read operation, a single write operation, a multiple read operation, a multiple write operation and an erase operation;
• wherein if the address extension command comprises a first CMD22 command and a second CMD22 command, and the access command comprises a CMD32 command, a CMD33 command and a CMD38 command, the step of accessing the memory location of the SD card includes performing the erase operation from the memory location indicated by the third address to another memory location indicated by a fourth address in response to the CMD38 command, and wherein the third address is generated according to the first CMD22 command and the CMD32 command and the fourth address is generated according to the second CMD22 command and the CMD33 command.