Patent ID: 7891566
Filing Date: 2011-02-22
Classification: G06F,G11C,H04L

Abstract:
1. A memory device comprising: a memory which stores information and a controller to control the memory, the memory device supporting a small capacity format or a large capacity format which allows for storing larger information than the small capacity format, and the memory device being configured to recognize a voltage identification command which includes a voltage range identification section, an error detection section, and a check pattern section, wherein the voltage range identification section of the voltage identification command has a pattern indicating a range of supply voltage supplied by a host device which issues the voltage identification command, the memory device issues a response which includes a voltage range identification section and an error detection section or a check pattern section in response to the voltage identification command, the voltage range identification section of the response has a pattern which indicates the same voltage range as the range of the supply voltage when the memory device is operable with the supply voltage, the error detection section of the response has a pattern configured to enable the host device which has received the response to detect errors in the response, initialization of the memory device is allowed when the voltage range identification section of the response has the same pattern as a pattern of the voltage range identification section of the voltage identification command, and initialization of the memory device is prohibited when the voltage range identification section of the response has a pattern different from a pattern of the voltage range identification section of the voltage identification command.