Patent ID: 8495277
Filing Date: 2013-07-23
Classification: H01L,H04N

Abstract:
1. A semiconductor integrated circuit that interfaces an external circuit and a host for controlling the external circuit and that obtains data used to interface the external circuit and the host from a rewritable external memory provided separately from the external circuit, comprising: external terminals to which an external signal line group is connected, the external signal line group including signal lines connecting the external circuit and the external memory in parallel; an external terminal interface circuit configured to interface the semiconductor integrated circuit and the external circuit or the external memory connected via the external signal line group; a control circuit configured to activate or deactivate the external circuit and the external memory and connected via a first signal line to the external terminal interface circuit; and an internal circuit configured to interface the semiconductor integrated circuit and the host and connected via a second signal line to the external terminal interface circuit, wherein the control circuit is configured to exclusively activate one of the external circuit and the external memory that is to be accessed via the external terminal interface circuit, and wherein the external terminal interface circuit is configured to connect one of the first signal line and the second signal line to the external signal line group under control of the control circuit.