IA6464是OSD电路，与MCU配合使用，可控制不同类型的显示系统。显示点阵为12*18，内置部分数字、英文字符、日文字符。电路集成上电复位电路和VRAM清零电路用于减轻MCU的工作量，同时内置相位比较器和4倍频电路，可有效减小系统电路板的面积与外围电路成本。-IA6464 is the OSD circuit, used in conjunction with the MCU can control different types of display systems. 12* 18 dot matrix display, built-in part numbers, English characters, Japanese characters. Circuit integration and power-on reset circuit is used to reduce the MCU VRAM cleared the workload of the circuit, while built-in and 4-frequency phase comparator circuit, which can effectively reduce the system circuit board area and cost of the external circuit.