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松下 TC-33P25G 彩电是松下公司开发的大屏幕多制式彩色电视机机心,采用新型频率合成调谐系统和总线控制技术,可接收国际线路21种制式电视信号,具有射频画中画处理功能。松下 TC-33P25G 彩电总线系统较复杂,主控电路微处理器 IC1213(MN1876476TYN)结构如图1所示。有四组 I~2C 总线输出:由微处理器的(59)脚、(60)脚输出的第一组数据线 SDA 和时钟线 SCL 负责对主图像电路的控制,与主调谐器 TNR001(ENV59D54J6)、主偏转信号处理电路 IC771(TA8859AP)的⑩、⑨脚、主音频处理电路
Panasonic TC-33P25G color TV is developed by Panasonic’s large-screen multi-format color TV movement, the use of new frequency synthesis tuning system and bus control technology can receive 21 kinds of international lines of television signals, with RF PIP processing. Panasonic TC-33P25G color TV bus system is more complex, the main control circuit microprocessor IC1213 (MN1876476TYN) structure shown in Figure 1. There are four sets of I ~ 2C bus outputs: the first set of data lines SDA and SCL output by the microprocessor’s (59) and (60) pins is responsible for the control of the main picture circuitry and the main tuner TNR001 (ENV59D54J6 ), The main deflection signal processing circuit IC771 (TA8859AP) ⑩, ⑨ feet, the main audio processing circuit