OUTPUT SIGNAL DESCRIPTION This section describes the various outputs of the DCI2. Full DTMF Configuration Note that the Data Valid signal, J2 pin 9 , for the Full DTMF configuration is a low pulse. In the non-latched configuration when valid data is detected the 4 data lines are set, data valid is pulsed low and the data lines are then all set high. In the latched configuration when valid data is detected the 4 data lines are set, data valid is pulsed low and data lines will remain set until the next valid DTMF tone is detected.
NON-LATCHED TIMING J2—7 J2—5 J2—3 J2 –1 DataValid LATCHED TIMING J2—7 J2—5 J2—3 J2 –1 DataValid DCI2 24 DTMF 0 DTMF A 1 0 1 1 0 1 0 1 300mS mS 300mS mS mS mS DTMF 0 DTMF A 1 0 1 1 0 1 0 1 300mS S 300mS S S S S S