mt9074ap1 Zarlink Semiconductor, mt9074ap1 Datasheet - Page 92
mt9074ap1
Manufacturer Part Number
mt9074ap1
Description
T1/e1/j1 Single Chip Transceiver With Wide Dynamic Range Liu
Manufacturer
Zarlink Semiconductor
Datasheet
1.MT9074AP1.pdf
(151 pages)
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Bit
7
6
3
2
1
0
5
4
REFRM
CRCM
CSYN
MFRF
Name
AUTC
AUTY
ASEL
ARAI
Table 79 - Mode Selection Control Word (E1)
AIS Select. This bit selects the criteria on which the detection of a valid
Alarm Indication Signal (AIS) is based. If zero, the criteria is less than three
zeros in a two frame period (512 bits). If one, the criteria is less than three
zeros in each of two consecutive double-frame periods (512 bits per double
frame).
CRC-4 Modification. If one activates the CRC-4 remainder modification
function when the device is in transparent mode. The received CRC-4
remainder is modified to reflect only the changes in the transmit DL. If zero,
time slot zero data from DSTi will not be modified in transparent mode.
Automatic CRC-interworking. If zero, automatic CRC-interworking is
activated. If one it is deactivated. See Framing Algorithm for a detailed
description.
Automatic Remote Alarm Indication. if zero, the Remote Alarm Indication
bit (the A bit) will function automatically. That is, RAI=0 when basic
synchronization has been acquired. And, RAI=1 when basic synchronization
has not been acquired. if one, the remote alarm indication bit is controlled
through the TALM bit of the transmit Non-Frame Alignment Control Word.
Automatic Y-Bit Operation. If zero, the Y-bit of the transmit multiframe
alignment signal will report the multiframe alignment status to the far end
i.e., zero - multiframe alignment acquired, one - lost. If one, the Y-bit is under
the manual control of the Transmit Multiframe Alignment Control Word.
CRC-4 Synchronization. If zero, basic CRC-4 synchronization processing
is activated, and the TIU0 Bit and the TIU1 bit programming will be
overwritten. If one, CRC-4 synchronization is disabled. If AUTC (Page 1,
Address 10H, bit 5) is also one then the first bits of channel 0 are used as
international use bits and are programmed by the TIU0 and TIU1.
Reframe. If one for at least one frame, and then cleared, the device will
initiate a search for a new basic frame position. Reframing function is
activated on the one to zero transition of the REFRM bit.
Multiframe Reframe. If one, for at least one frame, and then cleared the
MT9074 will initiate a search for a new signaling multiframe position.
Reframing function is activated on the one to zero transition of the MFRM
bit.
(Page 1, Address 10H)
Zarlink Semiconductor Inc.
MT9074
92
Functional Description
Data Sheet
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