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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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N681387DG Fiches technique(PDF) 30 Page - Nuvoton Technology Corporation |
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N681387DG Fiches technique(HTML) 30 Page - Nuvoton Technology Corporation |
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30 / 164 page  N681386/87 Single Programmable Extended Codec/SLCC Preliminary Datasheet Rev1.0 Page 30 of 164 January 2010 12.1.1.3.3. SETTING LOOP CLOSURE DETECT AUTOMATIC REACT Setting LAMC:LCDA[0] address (0x43) bit makes the channel automatically enter the Active state from the ON-HOOK Transmission, Idle, TIP Open, and RING Open states upon Loop Closure Detect. Furthermore, the channel will transition from Active to Idle state if the Loop Closure Detect circuitry indicates a loop closure is no longer present, and back to Active state upon a reoccurrence of Loop Closure Detect. When the above automatic transitions do occur, LS:LS[3:0] address (0x44) will be updated automatically to reflect the newly entered state. In all cases the shadow linefeed status bits, LS:SLS[3:0] address (0x44) reflect the actual linefeed status. This includes switching between ‘Ringing’ during the ring burst and ‘ON-HOOK Transmission’ during the cadence. This RING/cadence transition is not considered an automatic transition and LS:LS[3:0] address (0x44) will continue to reflect Ringing state. The following example state diagram illustrates LS:SLS[3:0] address (0x44) states including automatic transitions, RING/Cadence transition and several possible transitions solely governed by software. Figure 7: Example State Diagram Register Bit(s) Address Parameter Description / Range LS LS[3:0] 0x44 Programmed Linefeed Status Eleven states SLS[7:4] 0x44 Shadow Linefeed Status Reflects actual state LAMC PAA[2] 0x43 Power Alarm Automatic React Enable/Disable RGA[1] 0x43 RING Automatic Enable/Disable LCDA[0] 0x43 Loop Closure Detect Automatic React Enable/Disable Table 6: Associated Registers for Linefeed Control Ringing On Hook Transmission (F/R) Ring Cadence & LS[3:0] = Ringing LFSDS LC_Auto = RTLC:LCD = 1 & LAMC:LCDA= 1 ! LC_Auto = RTLC:LCD= 0 & LAMC:LCDA= 1 RT_Auto = RTLC:RTD = 1 & LAMC:RGA= 1 PA_Auto = Power Alarm Event & LAMC:PAA = 1 F/R = Forward / Reverse n = 1, 2 RT_Auto Ring Burst & LS[3:0] = Ringing SW SW SW Active (F/R) Any State TIP Open Any State RING Open SW Any State Open PA_Auto SW Any State Idle (F/R) SW LC_Auto LC_Auto LC_Auto !LC_Auto SW SW LC_Auto SW Open LFSDS LC_Auto = RTLC:LCD = 1 & LAMC:LCDA= 1 ! LC_Auto = RTLC:LCD= 0 & LAMC:LCDA= 1 RT_Auto = RTLC:RTD = 1 & LAMC:RGA= 1 PA_Auto = Power Alarm Event & LAMC:PAA = 1 F/R = Forward / Reverse n = 1, 2 SW LC_Auto !LC_Auto Any State Calibration SW |
Numéro de pièce similaire - N681387DG |
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Description similaire - N681387DG |
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