基于PSTN的家用电器远程控制系统设计方案

155()“O”“1”()DTMF(l212)“1”“”“O”“”“O”()25DTMF13.3.2MT88704MT8870(DTMF)DTMFTEL0TELlMT8870INDTMF4Q1Q4LPC932POIN-GS3.43.4.1APR9600ISD3260s2568ISDAPR9600(AGC)100mVFlashFlashFlash16Ω816Ω122mW(16Ω)3.4.2(1)APR96008APR9600APR9600858MSEL11()MSEL21()M81REOM1“”BUSYl“”BUSYM2M8775s(60s)“”RE1M11M1M11M2M87CE(2)APR9600CPULM32468LPC9328IOLPC9323IO3-874LSl383I08IO8P14P15P163—8ABC(M1M8)SP+SPLM32435351CPUI0CPU33131148V(25±15)V25Hz(75±15)V25Hz5s1s4sLPC9323.1.2(9018)LPC932INTO2(75±15)V25Hz48V(25±15)V25HzC1R1R1D1C2R2LPC9323.23.2.1020mA30mA3.2.290133P13CPUT1()P13T1T1K1K130mA3.3DTMF3.3.1DTMFTELOTEL1(DTMF)MT8870CPU35290137CPUP15P15D19013KTTKKTTD1KT4(DTMF)LPC932LPC932LPC932IOMT887085LPC932