| 摘要 |
PROBLEM TO BE SOLVED: To correspond to a change and addition of a standard in a short period of time at a low cost only by changing a firmware. SOLUTION: A controller 3 of this memory card is provided with a command decode circuit 6 for decoding a command issued from a host HT, a command enable register 8 in which validity and invalidity of the received command are set, and a command detection signal generating circuit 7 for detecting a valid command on the basis of a decode result of the command decode circuit 6 and a set value of the command enable register 8. When the command enable register 8 receives a command which is set valid, the command detection signal generating circuit 7 outputs a detection signal to a control part 4, and executes a process provided for each command. When the command enable register 8 receives a command which is set invalid, the detection signal is not outputted and the command is ignored. |
