Patent ID: 6718443
Filing Date: 2004-04-06
Classification: H04N

Abstract:
A semiconductor integrated circuit device formed on a single semiconductor chip, comprising:a functional block for carrying out a predetermined data processing operation and for generating a first access signal for accessing a memory; an external interface terminal for receiving a second access signal for accessing the memory from exterior of the single semiconductor chip; a first selector having a first input for receiving the first access signal from said function block, a second input for receiving the second access signal from said external interface terminal, and an output connected to the memory, said first selector for selecting one of said first and second inputs and for electrically connecting the output to the selected input so as to provide the memory with the access signal received at the selected input through the output; and a second selector having a first electrode connected to said function block, a second electrode connected to said external interface terminal and a third electrode connected to the second input of said first selector, said second selector for electrically connecting the first electrode to the second electrode when said first selector selects the first input and for electrically connecting the third electrode to the second electrode when said first selector selects the second input.