Maxim-integrated 73M1822/73M1922 Implementers Guide Manuel d'utilisateur télécharger pdf (Page 20)

73M1822/73M1922 Implementer’s Guide UG_1x22_052

20 Rev. 1.0

5 Off-Hook Procedures

The off-hook procedures described in this section include:

• Barrier Synch Loss

• On-hook Request

• Parallel Pickup Event Detection

5.1 Barrier Synch Loss

When in an off hook state the host must be ready to act in case of a barrier failure. The host should

attempt to put the device in an on-hook state and then reset the PLL and barrier so they can resync.

The on-hook request procedure is described in Section 5.2. The procedure for barrier synchronization is

described in Section 3.2.1.

5.2 On-hook Request

The registers used in the on-hook request procedure are:

0x12

OFH

ENDC

ENAC

ENSHL

ENLVD

ENFEL

ENDT

ENNOM

Write 0 0 0 X X X X X

Begin

1. Set ENDC = ENAC = OFH = 0 (write RG12 = 000x_xxxx).

End

5.3 Parallel Pickup Event Detection

To be defined.

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Maxim-integrated 73M1822/73M1922 Implementers Guide Manuel d'utilisateur Page 20