MT9074AL Zarlink Semiconductor, Inc., MT9074AL Datasheet - Page 75

• Manufacturer Part Number: MT9074AL
• Description: T1/E1/J1 Single Chip Transceiver
• Manufacturer: Zarlink Semiconductor, Inc.

Data Sheet
Bit
4-0
Bit
7-0 TxM7-0 Transmit Message Bits 7 - 0. The
Bit
Table 86 - Multiframe and Data Link Selection
7
6
5
Table 87 - Transmit Message Word (E1)
Table 88 - Error Insertion Word (E1)
Name
CRCE
Name
Name
BPVE
FASE
Sa4-
Sa8
(Page 1, Address 18H)
(Page 1, Address 17H)
(Page 1, Address 19H)
contents of this register are transmit
into those outgoing DS1 channels
selected by the Per Time Slot Control
registers.
A one selects the corresponding
Sa bits of the NFA signal for 4, 8,
12, 16 or 20 kbits/sec. data link
channel. Data link (DL) selection
will function in termination mode
only; in transmit transparent mode
Sa4 is automatically selected - see
TxTRSP control bit of page 01H,
address
corresponding bits of transmit non-
frame
programmed by the Non-Frame
Alignment Control Word (page
01H, address 16H).
Bipolar Violation Error Insertion.
A zero to one transition of this bit
inserts a single bipolar violation
error into the transmit PCM30
data. A one, zero or one to zero
transition has no function.
CRC-4 Error Insertion. A zero to
one transition of this bit inserts a
single
transmit PCM30 data. A one, zero,
or one to zero transition has no
function.
Frame Alignment Signal Error
Insertion. A zero to one transition
of this bit inserts a single error into
the time slot zero frame alignment
signal of the transmit PCM30 data.
A one, zero, or one to zero
transition has no function.
Functional Description
Functional Description
Functional Description
(E1)
CRC-4
alignment
11H.
error
If
signal
zero,
into
are
the
the
Bit
4
3
2
1
0
Table 88 - Error Insertion Word (E1)
Name
PERR
NFSE
LOSE
LOS/
LOF
- - -
(Page 1, Address 19H)
Non-frame
Error Insertion. A zero to one
transition of this bit inserts a single
error into bit two of the time slot
zero non-frame alignment signal of
the transmit PCM30 data. A one,
zero, or one to zero transition has
no function.
Loss of Signal Error Insertion. If
one, the MT9074 transmits an all
zeros signal (no pulses) in every
PCM30 time slot. When HDB3
encoding is activated no violations
are transmitted. If zero, data is
transmitted normally.
Payload Error Insertion. A zero
to one transition of this bit inserts a
single
payload. A one, zero, or one to
zero transition has no function.
Unused
Loss of Signal or Loss of Frame
Selection. If one, pin LOS (pin 61
in PLCC, 57 in MQFP) will go high
when a loss of signal state exits. A
loss of signal is defined as either
receipt of a signal attenuated
below the analog loss of signal
threshold (selectable as 20 dB or
40 dB below nominal) or receipt of
192 consecutive 0’s. If low, pin
LOS will go high when either a loss
of signal or a loss of basic frame
alignment state exits (bit SYNC on
page 03H address 10H is zero).
Functional Description
error
Alignment
in
the
MT9074
transmit
Signal
75