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N682386MG Datasheet(PDF) 47 Page - Nuvoton Technology Corporation |
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N682386MG Datasheet(HTML) 47 Page - Nuvoton Technology Corporation |
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47 / 160 page  N682386/87 + N681622 Dual Programmable Extended Codec/SLCC + SLFC Revision 1.3 Page 47 of 160 Sep 2010 Register Bit(s) Address Parameter Description / Range LCT LCT[5:0] 0x53 Loop Closure Threshold Current Based: 0-80 mA @ 1.27 mA Voltage based: 0-93.5V @ 1.484V LPI ILPCn[11:0] 0x90 Loop Closure Current Based: 0-78.74 mA @ 1.25 mA LCTHY LCHYEN[6] 0x54 Enable Hysteresis LCTHY LCTOFF[5:0] 0x54 Loop Closure Threshold Off-Hook to ON-HOOK state Enable Hysteresis When hysteresis enabled only opposite transition governed by LCT. Current Based: 0-80 mA @ 1.27 mA Voltage based: 0-93.5V @ 1.484V LCDB LCDI[7:0] 0x47 Loop Closure Detect Debounce Interval 0 to 159 milliseconds LCDCL DCH LCDC[7:0] LCDC[11:8] 0x50 0x52 Loop Closure Filter Coefficient For Digital LPF INT1 LCCn[1] 0x26 Loop Closure Interrupt Pending Status IE1 LCECn[1] 0x27 Loop Closure Interrupt Enable Enable/Mask RTLC LCD[0] 0x46 Loop Closure Detect Status Status / Enable Voltage-based Loop Closure LCMC LCMCNT[7:0] 0xAB Loop Closure Detect Mask Counter 0 to 319 ms in 1.25 ms steps LAMC LCDACn[0] 0x43 Enable Automatic Transitions Control Table 19: Loop Closure Detection Registers If LAMC:LCDACn[1] address (0x43) is set the channel will automatically transition from the Idle (Forward or Reverse), ON-HOOK Transmission (Forward or Reverse) as well as TIP Open or RING Open into the Active (Forward or Reverse) state upon a valid Loop Closure Detect. Voltage based Loop Closure Detect can also be enabled by setting bit RTLC:VBLCCn[5] address (0x46). In this case the input signal is the Loop Voltage and the thresholds are interpreted as voltages. All other functionality is the same. |
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