Maxim Integrated 73M1822/73M1922 Implementers Guide - Manual (Page 23)

UG_1x22_052 73M1822/73M1922 Implementer’s Guide
Rev. 1.0 23
6.4 RGDT and RGMON Interrupts
The triggering of an RGDT or RGMON interrupt indicates that the device has detected an AC signal on
the line greater than the threshold programmed through the RGTH register.
0x05 ENGPIO7 ENGPIO6 ENGPIO5 ENGPIO4 ENAPOL ENDET ENSYNL ENRGDT
Write X X X X 1 X X 1
0x0E FRCVCO PWDNPLL Res Res Res Res RGTH1 RGTH0
Write X X X X X X VAL1[1:0]
Set the ENRGDT bit in Register 0x05 to enable the RGDT and RGMON interrupts.
Begin
1. If RGDT = 1 (IntSrc = xxxx_xxx1) or RGMON = 1 (IntSrc = xxxx_1xxx), goto Ring Detection and Line
Polarity Reversal (see Section 4.3 ).
End