MT9074AL Zarlink Semiconductor, Inc., MT9074AL Datasheet - Page 46

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

MT9074
46
7 - 0 BIOMTx7-0 Transmit
Table 24 - Transmit Bit Oriented Message (T1)
Bit
Bit
1
0
Table 23 - Data Link Control Word (T1)
H1R64
Name
JTS
Name
(Page 1, Address 13H)
(Page 1, Address 12H)
Japan
nization. Setting this bit forces the
inclusion of Sbits in the CRC-6
calculation.
HDLC1 Rate Select. Setting this
pin high while HDLC1 is activated
enables 64 Kb/s operation of the
data link on channel 24. Setting
this pin low while HDLC1 is
activated
operation on channel 24 (this
prevents data corruption due to
forced bit stuffing).
Message. The contents of this
register are concatenated with a
sequence
continuously transmit in the FDL
bit
Normally the leading bit (bit 7)
and last bit (bit 0) of this register
are set to zero.
Functional Description
Functional Description
position
Telecom
enables
of
Bit
of
eight
ESF
56
Synchro-
Oriented
1’s
trunks.
Kb/s
and
2-1
Bit
7
6
5
4
3
0
Table 25 - Signaling Control Word (T1)
DSToEn
CSToEn
SM1-0
Name
RBEn
DBEn
JYEL
MSN
(Page 1, Address 14H)
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.
Robbed Bit Signaling Enable.
Setting this bit multiplexes the AB
or ABCD signaling bits into bit
position 8 of all DS0 channels
every 6th frame.
Debounce Enable. Setting this
bit causes incoming signaling bits
to be debounced for a period of 6
to 9 milliseconds before reporting
on CSTo or in the Receive
Signaling Bits Page.
Most Significant Nibble. If set to
one the most significant nibble of
CSTi and CSTo are activated.
The
contains signaling information for
the equivalent channel in the
most significant nibble, and least
significant nibble is tristate. If set
to zero the least significant nibble
is active for CSTi and CSTo and
the most significant nibble of
CSTo is tristate.
Signaling Message. These two
bits are used to fill the vacant bit
positions available on CSTo when
the MT9074 is operating on a D4
trunk. The first two bits of each
reporting nibble of CSTo contain
the AB signaling bits. The last two
contain SM1 and SM0 (in that
order). When the MT9074 is
connected to ESF trunks four
signaling
reported and bits SM1-0 become
unused.
Japan Yellow Alarm. Set this bit
high to select a pattern of 16 ones
(1111111111111111) as the ESF
yellow alarm, both for the case
when and ESF yellow alarm is to
be transmitted or in recognizing a
received yellow alarm.
Functional Description
reporting
Data Sheet
bits
stream
(ABCD)
CSTo
are