MT9072AB datasheet(177/275 Pages) ZARLINK

177 / 275 page

MT9072

Data Sheet

177

Zarlink Semiconductor Inc.

Bit

Name

Functional Description

15-12

not used.

RFL

(0)

Receive Signaling Freeze due to Loss. If one, the receive signaling is frozen if a receive loss

of signal is detected. The freeze is cleared upon clearance of Loss.

DBNCE

(0)

Debounce Select. This bit selects the receive CAS debounce period. If one, 14 ms of

debounce is used. There may be as much as 2 ms added to this duration because the state

change of the signaling equipment is not synchronous with the PCM30 signaling multiframe. If

zero, no debounce is used.

9,8

(00)

not used.

TMA1

TMA2

TMA3

TMA4

(0000)

Transmit Multiframe Alignment Bits One to Four. These bits are transmitted on the PCM30

link, in the Multiframe Alignment Signal (MFAS) positions (one to four of timeslot 16) of frame

zero of every Channel Associated signaling (CAS) multiframe. These bits are used by the far

end to identify specific frames of a CAS multiframe. TMA1-4 = 0000 for normal operation.

3X1

(1)

Transmit Non-Multiframe Alignment Signal (NMAS) Spare Bit. This bit is transmitted on the

PCM30 link in bit position five of timeslot 16 of frame zero of every signaling multiframe. X1 is

normally set to one.

(1)

Transmit Remote Multiframe Alarm Signal. This bit is transmitted on the PCM30 link in bit

position six of timeslot 16 of frame zero of every signaling multiframe when control bit AUTY

(register address Y00) is set to one. The Y bit is used to indicate the loss of multiframe

alignment to the remote end of the link. If one, loss of multiframe alignment; if zero, multiframe

alignment acquired.

(11)

Transmit Non-Multiframe Alignment Signal (NMAS) Spare Bits. These bits are transmitted

on the PCM30 link in bit positions seven and eight respectively, of timeslot 16 of frame zero of

every signaling multiframe. X2 and X3 are normally set to one.

Table 147 - CAS Control and Data Register (R/W Address Y05) (E1)

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