MT9075 MITEL [Mitel Networks Corporation], MT9075 Datasheet - Page 33

• Manufacturer Part Number: MT9075
• Description: E1 Single Chip Transceiver
• Manufacturer: MITEL [Mitel Networks Corporation]

Preliminary Information
Bit
7
6
5
4
3
2
1
0
Table 19 - Transmit Alarm Control Word
DSToDE DSTo Data Enable. If zero, DSTo is
CSToDE CSTo Data Enable. If zero, CSTo is
64KSEL 64 KHz Select. If one, a 64 KHz
REFRM Reframe. If one for at least one
TAIS16
Name
TAIS0
TAIS
TE
(Page 01H, Address 16H)
Transmit Alarm Indication Signal.
If one, an all ones signal is
transmitted. TAIS=0
operation.
Transmit AIS Time Slot Zero. If
one,
transmitted in time slot zero. If zero,
time slot zero functions normally.
Transmit AIS Time Slot 16. If one,
an all ones signal is transmitted in
time slot 16. If zero, time slot
functions normally.
Transmit E bits. When zero and
CRC-4
achieved, the E-bits transmit the
received CRC-4 comparison results
to the distant end of the link, as per
G.704. That is, when zero and
CRC-4 synchronization is lost, the
transmit E-bits will be zero. If one,
and CRC-4 synchronization is lost
the transmit E-bits will be one.
frame, and then cleared, the device
will initiate a search for a new basic
frame position. Reframing function
is activated on the one-to-zero
transition of the REFRM bit.
signal
extracted received 2048 kbit/sec.
clock is output on RxFP/Rx64KCK
(pin 47 in PLCC, 35 in MQFP). If
zero that pin outputs an 8 KHz
signal derived from the extracted
clock.
enabled. If one, DSTo will be
tristated if one of the following
conditions exists: LIU loss of signal,
loss
(SYNC=1), loss of CRC4 sync
(CRCSYN=1) or AIS.
enabled. If one, CSTo will be
tristated if one of the following
conditions exists: loss of multiframe
sync (MFSYNC=1), or AIS16 =1
Functional Description
of
an
divided
terminal
all
synchronization
ones
down
frame
for normal
signal
from
sync
the
is
is
Table 20 - National Use Bit Interrupt Mask Word
Bit
7
6
5
4
3
2
1
0
PRBSO PRBS
C8S
PRBSI
Name
S
S
S
S
a
a
---
nibI
a6
a5
bitI
a6
I
I
(Page 01H, Address 19H)
I
Unused.
Interrupt.
(PRBSO = 1), an interrupt is
initiated on overflow of PRBS
counter (page 04H, address 10H)
from FFH to 0H. Interrupt vector =
00000010.
PRBS Interrupt. When unmasked
(PRBSI = 1), an interrupt is initiated
on a single PRBS detection error.
Interrupt vector = 00000010.
Changed S
When unmasked (S
interrupt
detection of a change of state in any
of received S
nibble S
Interrupt vector = 00000010.
Changed S
unmasked (S
is generated upon detection of a
change of state in any of received
S
Interrupt vector = 00000010.
Eight Consecutive S
Interrupt. When unmasked (C8S
= 1), an interrupt is generated upon
detection of the eighth consecutive
S
Interrupt vector = 00000010.
Changed S
When unmasked (S
interrupt
detection of a change of state in
received
vector = 00000010.
Changed S
unmasked (S
generated upon detection of a
change of state in the received S
bit. Interrupt vector = 00000010.
a
a6
bits (S
nibble with the same pattern.
a6
Functional Description
, nibble S
S
is
a5
is
Counter
a5
a
a6
a6
a
a
a5
, S
a
Bit Interrupt. When
bitI = 1), an interrupt
When
Bit Interrupt. When
I =1), an interrupt is
nibbles (nibble S
Nibble Interrupt.
generated
Nibble Interrupt.
generated
nibbles.
a6
MT9075A
a7
, S
a
or nibble S
a6
nibI = 1), an
a7
I = 1), an
a6
unmasked
Overflow
or S
Interrupt
Nibble
upon
upon
4-161
a8
a8
a5
a6
a5
).
).
,
I