Memory system in which extension function can easily be set

An electronic device provided between a host device, and a memory device,

• the memory device comprising:
• a non-transitory medium;
• a controller configured to control the non-transitory medium;
• a memory serving as a work area connected to the controller;
• an extension function section to be controlled by the controller;
• and
• an extension register provided on the memory, and provided with a certain block length capable of defining an extension function of the extension function section,
• the electronic device comprising:
• a converter, wherein
• the converter comprises:
• a separating section configured to separate command transferred from the host into header data and variable-length command data;
• and
• a command issuing section configured to create a first command to write the header data of the command separated by the separating section to the extension function section, and create a second command to read header data of a response from the extension function section through the extension register.

An electronic device comprising:

• a distributor connected to a host device;
• a converter connected to the distributor, and connected to a memory device;
• and
• a bridge circuit connected to the distributor, and connected to a hard disk device, wherein
• the memory device comprises:
• a non-transitory medium;
• a controller configured to control the non-transitory medium;
• a memory serving as a work area connected to the controller;
• an extension function section to be controlled by the controller;
• and
• an extension register provided on the memory, and provided with a certain block length capable of defining an extension function of the extension function section,
• the converter comprises:
• a separating section configured to separate header data and variable-length command data of a command transferred from the host device from each other;
• and
• a command issuing section configured to create a first command to write the header data of the command separated by the separating section to the extension function section, and create a second command to read header data of a response from the extension function section through the extension register.

A memory system comprising:

• a non-transitory medium;
• a controller configured to control the non-transitory medium;
• an extension function section to be controlled by the controller;
• and
• an extension register provided with a certain block length capable of defining an extension function of the extension function section, wherein
• the controller processes a first command to write header data of a command to operate the extension function section to the extension function section through the extension register, and a second command to read header data of a response from the extension function section through the extension register.

An SD memory card capable of communicating with a host device comprising:

• a non-transitory medium;
• a controller;
• and
• an extension register including a space capable of defining an extension function, wherein
• the SD memory card carries out communication with the host device by using the extension register, and processes a first command to write header data of a command to the extension function through the extension register, and a second command to read header data of a response from the extension function.