Irdeto CT1642 FD650 Cb12 PT8211 测试， 其中Irdeto只测试ATR信号，CT1642和FD650驱动LED数码管，Cb12是红外编码单片机，PT8211是音频DAC-Irdeto CT1642 FD650 Cb12 PT8211 test, which tests only Irdeto ATR signal, CT1642 and FD650 drive LED digital tube, Cb12 is encoded infrared chip, P