This design is mainly based FPGA devices completed a telephone billing IC design, which can show the user the value of the IC card balance, and according to the user' s current traffic types and talk time for deductions, and the user' s real-time balance and talk time via 4-digit LED seven segment display display. Throughout the design process using a top-down design approach block, the entire telephone billing system will be divided into telephone billing, timekeeping module and display module into two modules, each module of its implementation is based on Quartus Ⅱ 9.2 platform using hardware description DE0 language programming.

Phone Call Meters by Quartus9.2.doc

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