Device and method for controlling command sequence

A device for controlling command sequence includes an internal storage memory, configured to store a plurality of commands and detail information corresponding to the plurality of commands; a command checking unit, configured to check a type of a first command of the plurality of commands; and at least a command execution unit, configured to read the plurality of commands in the internal storage memory, wherein each of the at least a command execution unit includes a command mode switching unit, configured to execute the first command by a first mode or a second mode according to the type of the first command; wherein the first command is executed by the first mode based on an operation code and an operand of the first command and the first command is executed by the second mode executed based on a simple address data format of the first command.