mt9074ap1 Zarlink Semiconductor, mt9074ap1 Datasheet - Page 95

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

2-0
Bit
Bit
7
6
5
4
3
2
1
0
3
RxHDB3
TxHDB3
Name
MLBK
DLBK
RLBK
PLBK
SLBK
- - -
Name
MSN
- - -
Table 83 - Interrupt and Signaling Control Word (E1)
Table 84 - Coding and Loopback Control Word (E1)
High Density Bipolar 3 Encoding. If 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 instead. If zero, metallic loopback is disabled.
High Density Bipolar 3 Encoding. If 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.
Remote Loopback. If one, then all bipolar data received on RRTIP/RRING are
directly routed to TTIP/TRING on the PCM30 side of the MT9074. If zero, then this
feature is disabled.
ST-BUS Loopback. If one, then all time slots of DSTi are connected to DSTo on
the ST-BUS side of the MT9074. If zero, then this feature is disabled. See
Loopbacks section.
Payload Loopback. If one, then all time slots received on RTIP/RRING are
connected to TTIP/TRING on the ST-BUS side of the MT9074 (this excludes time
slot zero). If zero, then this feature is disabled. If receive channel 16 data is to be
included in the looped data, then the control bit TxCCS (Page 1, Address 14H, bit
5) must be set high, otherwise transmit signaling data, or HDLC1 data will be
placed into the outgoing channel 16 timeslot.
Most Significant Signaling Nibble. If one, the CSTo and CSTi channel
associated 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.
(Page 1, Address 14H)
(Page 1, Address 15H)
Zarlink Semiconductor Inc.
MT9074
95
Functional Description
Functional Description
Data Sheet