MT9076B Datasheet, PDF (108/172 Pages) Zarlink Semiconductor Inc – T1/E1/J1 3.3 V Single Chip Transceiver

MT9076B
Data Sheet
Bit
Name
Functional Description
7
BPVE Bipolar Violation Error Insertion. A zero to one transition of this bit inserts a single
bipolar violation error into the transmit PCM 30 data. A one, zero or one to zero transition
has no function.
6
CRCE CRC-4 Error Insertion. A zero to one transition of this bit inserts a single CRC-4 error into
the transmit PCM 30 data. A one, zero, or one to zero transition has no function.
5
FASE 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 PCM 30 data. A
one, zero, or one to zero transition has no function.
4
NFSE Non-frame Alignment Signal 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
PCM 30 data. A one, zero, or one to zero transition has no function.
3
LOSE Loss of Signal Error Insertion. If one, the MT9076 transmits an all zeros signal (no
pulses) in every PCM 30 time slot. When HDB3 encoding is activated no violations are
transmitted. If zero, data is transmitted normally.
2
PERR Payload Error Insertion. A zero to one transition of this bit inserts a single error in the
transmit payload. A one, zero, or one to zero transition has no function.
1
L32Z Digital Loss of Signal Selection. If one, the threshold for digital loss of signal is 32
successive zeros. If zero, the threshold is set to 192 successive zeros.
0 LOS/LOF 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 256 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).
Table 95 - Error Insertion Word (E1)
(Page 1, Address 19H)
108
Zarlink Semiconductor Inc.