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一、概述夏普(Sharp)7P-CK1机芯是日本夏普公司新开发的直角平面彩色电视机芯,适应的机种有CV-2121DK/CK、CV—5407CK1等。图1是选台电路电原理框图。电源一接通、自动复位电路向微处理器输出复位脉冲;微处理器开始工作。输出片选信号控制EAROM,关机时的选台数据从EAROM输入微处理器,使电视机工作在关机状态。同时微处理器输出键位扫描信号,对键盘进行键位扫描。当键盘有输入时,即产生相应的指令数码,微处理器则根据指令信号的时序和数码组合,从只读存储器中调用相应的程序,按规定的编码解码方案解
First, an overview Sharp (Sharp) 7P-CK1 movement is a newly developed flat-panel color TV Japan Sharp Sharp movements to adapt to the models are CV-2121DK / CK, CV-5407CK1 and so on. Figure 1 is the circuit diagram of the circuit selection circuit. When the power is turned on, an automatic reset circuit outputs a reset pulse to the microprocessor; the microprocessor begins to work. Output chip select signal control EAROM, turn off the channel selection data from the EAROM input to the microprocessor, the TV work in shutdown. At the same time the microprocessor output key scan signal, the keyboard key scan. When the keyboard has input, that is, the corresponding instruction digital, microprocessor is based on the command signal timing and digital combination, from the read-only memory call the appropriate program, according to the provisions of the codec solution