mt9074ap1 Zarlink Semiconductor, mt9074ap1 Datasheet - Page 76
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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
Bit
7
6
5
4
7
6
5
4
3
2
1
MFSYNC
TFSYNC
D4YALM
SECYEL
ESFYEL
Name
D4Y48
LOS
Name
BLUE
LLED
- - -
PDV
SE
Table 45 - Synchronization Status Word
Terminal Frame Synchronization. Indicates the Terminal Frame Syn-
chronization status (1 - loss; 0 - acquired). For ESF links terminal frame
synchronization and multiframe synchronization are synonymous.
Multiframe Synchronization. Indicates the Multiframe Synchronization
status (1 - loss; 0 -acquired). For ESF links multiframe synchronization and
terminal frame synchronization are synonymous.
Severely Errored Frame. This bit toggles when 2 of the last 6 received
framing bits are in error. The framing bits monitored are the ESF framing
bits for ESF links, the Ft bits for SLC-96 links and a combination of Ft and
Fs bits for D4 links (See Framing Mode Selection Word - page 1 address
10H).
Digital Los Of Signal. This bit goes high after the detection of 192
consecutive zeros. It returns low when the incoming pulse density exceeds
12.5% over a 250 ms period
Unused.
D4 Yellow Alarm. This bit is set if bit position 2 of virtually every DS0
channel is a zero for a period of 600 milliseconds. The alarm is tolerant of
errors by permitting up to 16 ones in a 48 millisecond integration period.
The alarm clears in 200 milliseconds after being removed from the line.
D4 Yellow Alarm - 48 millisecond sample. This bit is set if bit position 2
of virtually every DS0 channel is a zero for a period of 48 milliseconds.
The alarm is tolerant of errors by permitting up to 16 ones in the
integration period. This bit is updated every 48 milliseconds.
Secondary D4 Yellow Alarm. This bit is set if 2 consecutive ’1’s are
received in the Sbit position of the 12th frame of the D4 superframe.
ESF
0000000011111111 is received in seven or more codewords out of ten.
Blue Alarm. This bit is set if less than 6 zeros are received in a 3
millisecond window.
Pulse Density Violation. This bit toggles if RxB8ZS is set high, it will
toggle upon detection of 8 consecutive zeros. If RxB8ZS is set low, it
will toggle upon detection of 16 consecutive zeros on the line data, or if
there are less than N ones in a window of 8(N+1) bits - where N=1 to 23.
Line Loopback Enable Detect. This bit will be set when a framed or
unframed repeating pattern of 00001 has been detected during a 48
millisecond interval. Up to fifteen errors are permitted per integration
period.
Table 46 - Alarm Status Word
(Page 3, Address 10H) (T1)
(Page 3, Address 11H) (T1)
Yellow
Zarlink Semiconductor Inc.
MT9074
Alarm.
76
Functional Description
Functional Description
This
bit
sets
if
the
ESF
yellow
Data Sheet
alarm
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