MT9074AL Zarlink Semiconductor, Inc., MT9074AL Datasheet - Page 73

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

Data Sheet
Table 82 - Transmit Multiframe Alignment Signal
Table 83 - Interrupt and Signaling Control Word
1- 0
Bit
Bit
7
6
5
4
DSToEn
CSToEn
DBNCE,
TxCCS
Name
X2, X3
Name
(Page 1, Address 13H)
(Page 1, Address 14H)
These bits are transmitted on the
PCM30 2048 kbit/sec. link in bit
positions
respectively, of time slot 16 of
frame zero of every multiframe.
X2 and X3 are normally set to
one. If receive channel 16 data is
to be included in the looped data
then the control bit TxCCS (Page,
Address 14H, bit 5) must be set
high, otherwise transmit signaling
data, or HOLCC data will be
placed into the outgoing channel
16 timeslot.
DSTo Enable. If zero pin DSTo is
tristate. If set, the pin DSTo is
enabled.
CSTo Enable. If zero pin CSTo is
tristate. If set, the pin CSTo is
enabled.
Transmit
Signaling. If one, the transmit
section of the device is in common
channel signaling (CCS) mode. If
zero, it is in Channel Associated
Signaling (CAS) mode.
Debounce Select. This bit selects
the debounce period (1 for 14
msec.; 0 for no debounce). Note:
there may be as much as 2 msec.
added to this duration because
the state change of the signaling
equipment is not synchronous
with
multiframe.
Functional Description
Functional Description
(E1)
(E1)
the
seven
Common
PCM30
and
Channel
signaling
eight
Table 83 - Interrupt and Signaling Control Word
Table 84 - Coding and Loopback Control Word
Bit
2-0
Bit
7
6
5
4
3
3
RxHDB3 High Density Bipolar 3 Encoding. If
TxHDB3 High Density Bipolar 3 Encoding. If
Name
MLBK
DLBK
Name
- - -
MSN
- - -
(Page 1, Address 15H)
(Page 1, Address 14H)
one, HDB3 encoding is enabled in
the receive direction. If zero, AMI
signal without HDB3 encoding is
received
Metallic Loopback. If one, then the
external RRTIP and RRING signals
are isolated from the receiver, and
TTIP and TRING are internally
connected to the receiver analog
input
loopback is disabled.
one, HDB3 encoding is enabled in
the transmit direction. If zero, AMI
signal without HDB3 encoding is
transmitted.
Unused.
Digital Loopback. If one, then the
digital stream to the transmit LIU is
looped back in place of the digital
output of the receive LIU. Data
coming out of DSTo will be a delayed
version of DSTi. If zero, this feature is
disabled.
Most
Nibble. If one, the CSTo and
CSTi
signaling nibbles will be valid in
the most significant portion of
each ST-BUS time slot. If zero,
the CSTo and CSTi channel
associated signaling nibbles will
be valid in the least significant
portion of each ST-BUS time slot.
Unused.
Functional Description
Functional Description
instead.
(E1)
(E1)
Significant
channel
If
zero,
MT9074
associated
Signaling
metallic
73