mt9074ap1 Zarlink Semiconductor, mt9074ap1 Datasheet - Page 106

• Manufacturer Part Number: mt9074ap1
• Description: T1/e1/j1 Single Chip Transceiver With Wide Dynamic Range Liu
• Manufacturer: Zarlink Semiconductor

Bit
Bit
7
6
5
4
3
2
1
0
7
6
5
MFSYNC
CRCSYN
CRCIWK
CRCRF
Name
SYNC
REB1
REB2
CRCS1
CRCS2
RED
RFAIL
Name
Table 103 - Synchronization Status Word
(Page 3, Address 11H) (continued) (E1)
Receive Basic Frame Alignment. SYNC indicates the basic frame
alignment status (1 - loss; 0 - acquired).
Receive Multiframe Alignment. MFSYNC indicates the multiframe
alignment status (1 - loss; 0 -acquired).
Receive CRC-4 Synchronization. CRCSYN indicates the CRC-4
multiframe alignment status (1 - loss; 0 - acquired).
Receive E-Bit One Status. REB1 indicates the status of the received E1 bit
of the last multiframe.
Receive E-Bit Two Status. REB2 indicates the status of the received E2 bit
of the last multiframe.
CRC-4 Reframe. A one indicates that the receive CRC-4 multiframe
synchronization could not be found within the time out period of 8 msec.
after detecting basic frame synchronization. This will force a reframe when
the maintenance option is selected and automatic CRC-4 interworking is
de-selected.
RED Alarm. RED goes high when basic frame alignment has been lost for
at least 100 msec. This bit will be low when basic frame alignment is
acquired (I.431).
CRC-4 Interworking. CRCIWK indicates the CRC-4 interworking status (1 -
CRC-to-CRC; 0 - CRC-to-non-CRC).
Table 104 - Alarm Status Word 1
Receive CRC Error Status One. If one, the evaluation of the last
received submultiframe 1 resulted in an error. If zero, the last
submultiframe 1 was error free. Updated on a submultiframe 1 basis.
Receive CRC Error Status Two. If one, the evaluation of the last
received submultiframe 2 resulted in an error. If zero, the last
submultiframe 2 was error free. Updated on a submultiframe 2 basis.
Remote CRC-4 Multiframe Generator/Detector Failure. If one, then
each of the previous five seconds have an E-bit error count of greater
than 989, and for this same period the receive RAI bit was zero (no
remote alarm), and for the same period the SYNC bit was equal to zero
(basic frame alignment has been maintained). If zero, indicates normal
operation.
(Page 3, Address 10H) (E1)
Zarlink Semiconductor Inc.
MT9074
106
Functional Description
Functional Description
Data Sheet