N681622YG Nuvoton Technology Corporation of America, N681622YG Datasheet - Page 48

• Manufacturer Part Number: N681622YG
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of N681622YG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

LCT
LPI
LCTHY
LCTHY
LCDB
LCDCL
DCH
INT1
IE1
RTLC
LCMC
LAMC
If LAMC:LCDA[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:VBLC[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.
Register
Preliminary Datasheet Rev1.0
LCT[5:0]
ILP[11:0]
LCHYEN[6]
LCTOFF[5:0]
LCDI[7:0]
LCDC[7:0]
LCDC[11:8]
LC[1]
LCE[1]
LCD[0]
LCMCNT[7:0]
LCDA[0]
Bit(s)
Address
0xAB
0x53
0x90
0x54
0x54
0x47
0x50
0x52
0x26
0x27
0x46
0x43
Table 19: Loop Closure Detection Registers
Loop Closure Threshold
Loop Closure
Enable Hysteresis
Loop Closure Threshold Off-Hook to
ON-HOOK state Enable Hysteresis
Loop Closure Detect Debounce
Interval
Loop Closure Filter Coefficient
Loop Closure Interrupt Pending
Loop Closure Interrupt Enable
Loop Closure Detect Status
Loop Closure Detect Mask Counter
Enable Automatic Transitions
Page 48 of 164
Parameter
Single Programmable Extended Codec/SLCC
Current Based: 0-80 mA @ 1.27 mA
Voltage based: 0-93.5V @ 1.484V
Current Based: 0-78.74 mA @ 1.25
mA
When hysteresis enabled only
opposite transition governed by LCT.
Current Based: 0-80 mA @ 1.27 mA
Voltage based: 0-93.5V @ 1.484V
0 to 159 milliseconds
Status
Enable/Mask
Status / Enable Voltage-based
Loop Closure
Control
For Digital LPF
0 to 319 ms in 1.25 ms steps
Description / Range
N681386/87
January 2010