APPARATUS AND RELATED METHOD FOR SHARING ADDRESS AND DATA PINS OF A CRYPTOCARD MODULE AND EXTERNAL MEMORY

摘要

A digital television (DTV) system has a front-end circuit comprising a DTV demodulator and a back-end circuit. The back-end circuit includes a DTV demultiplexer, a cryptocard module controller, and an external memory controller. The DTV system also includes an external memory coupled to the back-end circuit, an address bus and a data bus to which the external memory is coupled through a plurality of address and data pins, and a cryptocard module coupled to the front-end circuit and the back-end circuit for performing conditional access and security functions, the cryptocard module having address and data pins coupled to address and data pins of the external memory.