MT9079 Mitel Semiconductor, MT9079 Datasheet - Page 36

• Manufacturer Part Number: MT9079
• Description: CMOS ST-BUS FAMILY Advanced Controller for E1
• Manufacturer: Mitel Semiconductor

MT9079
4-272
Bit
4
3
2
1
0
(Page 3, Address 19H) (continued)
Table 58 - Alarm Status Word One
AIS16S
Name
RCRS
LOSS
AISS
RAIS
Loss of Signal Status Indication. If
one, indicates the presence of a loss
of signal condition. If zero, indicates
normal operation. A loss of signal
condition occurs when there is an
absence of the receive PCM 30 sig-
nal for 255 contiguous pulse (bit)
positions from the last received
pulse. A loss of signal condition ter-
minates when an average ones den-
sity of at least 12.5% has been
received over a period of 255 contig-
uous pulse positions starting with a
pulse.
Alarm Indication Signal 16 Status. If
one, indicates an all ones alarm is
being received in channel 16. If zero,
normal operation. Updated on a
frame basis.
Alarm Indication Status Signal. If
one, indicates that a valid AIS or all
ones signal is being received. If zero,
indicates that a valid AIS signal is not
being received. The criteria for AIS
detection is determined by the con-
trol bit ASEL.
Remote Alarm Indication Status. If
one, there is currently a remote alarm
condition. If zero, normal operation.
Updated on a non-frame alignment
frame basis.
RAI and Continuous CRC Error Sta-
tus. If one, there is currently an RAI
and continuous CRC error condition.
If zero, normal operation. Updated on
a submultiframe basis.
Functional Description
Status Page 4
Tables 59 to 66 describe the bit functions of the page 4
status registers and counters.
Status Word is cleared automatically after it is read by
the microprocessor. The RESET and RST functions
do not affect the page 4 counters.
individual counters must be initialized to a starting
value by a write operation or a counter load operation
(Table 43) in ST-BUS control mode. When presetting
or clearing the BPV counter, BPV7-BPV0 should be
written to first, and BPV15-BPV8 should be written to
last.
Table 61 - RAI and Continuous CRC Error Counter
7 - 0
7 - 0
7 - 0
Bit
Bit
Bit
Table 59 - Interrupt Vector Status Word
Table 60 - Bit Error Rate Counter
RCRC7
RCRC0
Name
Name
Name
BR7
BR0
IV7
IV0
-
-
-
(Page 4, Address 12H)
(Page 4, Address 18H)
(Page 4, Address 19H)
Interrupt Vector Bits 7 to 0. The inter-
rupt vector status word contains an
interrupt vector that indicates the cat-
egory of the last interrupt. See the
section on interrupts.
Bit Error Rate Counter. An eight bit
counter that contains the total num-
ber of bit errors received in a specific
time slot. See the
function of page 1, address 1AH.
RAI and Continuous CRC Error
Counter. An 8 bit counter that is
incremented once for every concur-
rent occurrence of the receive RAI
equal to one and either E-bit equal to
zero. Updated on a multiframe basis.
Functional Description
Functional Description
Functional Description
The Internal Vector
BFAS
Therefore,
control bit