Maxim Integrated 73M1822/73M1922 Implementers Guide - Manual (Page 22)

73M1822/73M1922 Implementer’s Guide UG_1x22_052
22 Rev. 1.0
6.2 DET Interrupt
The triggering of the DET interrupt indicates that the device has detected one of several line condition
errors. When found, it can be assumed that there is a problem with the line status. The general
corrective action is for the line side device to go on hook. These interrupts are only valid when the device
is in an off hook condition.
0x05 ENGPIO7 ENGPIO6 ENGPIO5 ENGPIO4 ENAPOL ENDET ENSYNL ENRGDT
Write X X X X 1 1 X X
0x12 OFH ENDC ENAC ENSHL ENLVD ENFEL ENDT ENNOM
Write 1 1 1 x x 1 1 x
0x13 DCIV1 DCIV0 ILM RSVD PLDM OVDTH IDISPD IDISPD
Write X X 0 0 0 1/0 0 0
0x14 TXBST DAA1 DAA0 Res RXBST RLPNH RXG1 RXG0
Write X X X 0 X X X X
0x15 Res DISNTR Res CIDM THEN ENUVD ENOVD ENOID
Write 0 0 0 0 1 1 1 1
0x1E ILMON UVDET OVDET OIDET SLLS Res Res Res
Read X ? ? ? X X X X
Set the ENDET bit in Register 0x05 to enable the DET interrupt.
Begin
1. If DET = 1 (IntSrc = xxxx_x1xx).
2. Read RG1E
3. If OVDET = 1, report condition to user and put device on hook.
4. If OIDET = 1, report condition to user and put device on hook
5. If UVDET = 1, report condition to user and put device on hook
End
6.3 SYNL Interrupt
The triggering of the SYNL interrupt indicates that the device has detected a failure in the barrier between
the line and host side device. When found, it can be assumed that there is a problem with the barrier.
This failure is usually a problem with the PLL operation, therefore, the recommended way to deal with this
interrupt is to reset the device PLL.
0x05 ENGPIO7 ENGPIO6 ENGPIO5 ENGPIO4 ENAPOL ENDET ENSYNL ENRGDT
Write X X X X 1 X 1 X
Set the RNSYNL bit in Register 0x05 to enable the SYNL interrupt.
Begin
1. If SYNL = 1 (IntSrc = xxxx_xx1x), goto Barrier Synchronization Process (see Barrier Synchronization
Section 3.2.1)
End