MT9079 Mitel Semiconductor, MT9079 Datasheet - Page 29

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

Table 35 - Interrupt, Signalling and BERT Control
1 - 0
Bit
7
6
5
4
3
2
TxCAS
Name
RPSIG
SPND
BFAS
RDLY
INTA
(0)
(0)
(0)
(0)
(0)
(0)
---
(Page 1, Address 1AH)
Receive Delay. If one, the receive
elastic buffer will be one frame in
length and controlled frame slips will
not occur. The RSLIP and RSLPD
status bit will indicate a buffer under-
flow or overflow.
frame receive elastic buffer and con-
trolled slip functions are activated.
Suspend Interrupts. If one, the IRQ
output will be in a high-impedance
state and all interrupts will be
ignored. If zero, the IRQ output will
function normally.
Interrupt
zero-to-one or one-to-zero transition
will clear any pending interrupt and
make IRQ high. All interrupts must be
cleared with this bit when ST-BUS
access mode is used.
Transmit Channel Associated Signal-
ling. If zero, the transmit section of
the device is in CAS mode. If one, it
is in common channel signalling
mode.
Register Programmed Signalling. If
one, the transmit CAS signalling will
be controlled by programming page
5. If zero, the transmit CAS signalling
will be controlled through the CSTi2
stream. This bit has no function in
ST-BUS mode.
Bit Error Count on Frame Alignment
Signal. If zero, individual errors in bits
2 to 8 of the receive FAS will incre-
ment the Bit Error Rate Counter
(BERC). If one, bit errors in the com-
parison between receive circular
buffer one and the bit error rate com-
pare word will be counted.
Unused.
Word
Functional Description
Acknowledge.
If zero, the two
A
Bit
7
6
5
4
3
2
1
0
Table 36 - Interrupt Mask Word Zero
Name
AIS16I
BPVO
SYNI
LOSI
FERI
SLPI
RAII
AISI
(0)
(0)
(0)
(0)
(0)
(0)
(0)
(0)
(Page 1, Address 1BH
Synchronization
unmasked an interrupt is initiated
when a loss of basic frame synchro-
nization condition exists. If 0 -
unmasked, 1 - masked. Interrupt vec-
tor = 10000000.
Remote Alarm Indication Interrupt.
When unmasked a received RAI will
initiate an interrupt. If 0 - unmasked,
1 - masked.
01000000.
Alarm Indication Signal Interrupt.
When unmasked a received AIS will
initiate an interrupt. If 0 - unmasked,
1 - masked.
01000000.
Channel 16 Alarm Indication Signal
Interrupt.
received AIS16 will initiate an inter-
rupt. If 0 - unmasked, 1 - masked.
Interrupt vector = 01000000.
Loss
unmasked an interrupt is initiated
when a loss of signal condition
exists. If 0 - unmasked, 1 - masked.
Interrupt vector = 01000000.
Frame
unmasked an interrupt is initiated
when an error in the frame alignment
signal occurs. If 0 - unmasked, 1 -
masked.
00100000.
Bipolar Violation Counter Overflow
Interrupt. When unmasked an inter-
rupt is initiated when the bipolar vio-
lation error counter changes form
FFFFH to 0H. If 0 - unmasked, 1 -
masked.
00010000.
SLIP Interrupt. When unmasked an
interrupt is initiated when a controlled
frame slip occurs. If 0 - unmasked, 1
-
00000100.
masked.
Functional Description
of
Error
Signal
When
Interrupt
Interrupt
Interrupt
Interrupt vector =
Interrupt vector =
Interrupt.
Interrupt.
Interrupt.
MT9079
unmasked
vector
vector
vector
When
When
When
4-265
=
a
=
=