Overview
The LC7040N is the central IC to the ID LOGIC Module and Electronic Tuning Radio.
It performs the interface between the receiver’s main microprocessor and ID LOGIC’s 256kB database ROM and its 2kB update RAM. The LC7040N also contains the Phase-Locked Loop (PLL) circuitry responsible for electronic tuning and it offers several I/O ports.
The LC7040N permits the easy integration of the ID LOGIC Module in a receiver. It contains all the appropriate software to send and receive serial instructions and data to and from the receiver’s main microprocessor. An instruction is given simply by having the main microprocessor send a one byte-long function code followed, when necessary, by the appropriate data. Upon execution, the LC7040N returns its response data, if any, to the microprocessor for display or other processing.