Display controller and Semiconductor Integrated Circuit Device including the same

The display controller according to an embodiment of the present invention comprises a first data of reading the normal data according to the second register, the setting information of the first register is set by the first register, security (secure) operating system that is set by the open platform operating system input; The second data input unit that reads the security data according to the setting information of the second register; And composite (blending; blending) the normal data and the secret data to the secure data is displayed in the top (over) of the normal data and a data processing unit for outputting.