MT9075B Mitel Networks Corporation, MT9075B Datasheet - Page 35

• Manufacturer Part Number: MT9075B
• Description: E1 Single Chip Transceiver
• Manufacturer: Mitel Networks Corporation

Preliminary Information
Bit
2
1
0
Table 21 - Interrupt, Signalling and BERT
Control Word (Page 01H, Address 1AH)
CNTCLR
64KCCS
Name
MSN
(0)
(0)
(0)
Counter Clear. If one, all status
counters are cleared and held low.
Zero for normal operation.
Most
Nibble. If one, the CSTo and CSTi
channel
nibbles will be valid in the most
significant portion of each ST-BUS
time slot. If zero, the CSTo and
CSTi channel associated signalling
nibbles will be valid in the least
significant portion of each ST-BUS
time slot.
64
Signalling. If one, common channel
signalling information is sourced
from CSTi, and common channel
signalling information is clocked out
of CSTo. The transmit clock is an
internal clock. This 64 KHz clock is
divided down from C4b and is
synchronous
channel boundaries. The rising
edges of the clock occur between
channels 1 and 2; 5 and 6; 9 and
10; 13 and 14; 17 and 18; 21 and
22; 25 and 26; 29 and 30. The
receive clock is synchronous with
the same channel times, but derived
from the extracted clock timebase.
The CCS receive clock is driven out
on Rx64KCK (pin 47 in PLCC, 35 in
MQFP) when this bit is set. If zero
CSTi and CSTo have 2.048 mb/s bit
rates and operate as per Tables 66
to 71.
Kbits/s
Functional Description
Significant
associated
Common
with
the
Signalling
signalling
Channel
STBUS
Bit
7
6
5
4
3
2
1
0
AIS16I
BPVO
Name
Table 22 - Interrupt Mask Word Zero
SYNI
LOSI
FERI
SLPI
RAII
AISI
(0)
(0)
(0)
(0)
(0)
(0)
(0)
(0)
(Page 01H, Address 1BH)
Synchronization Interrupt. When
unmasked (SYNI = 0) an interrupt is
initiated when a loss of basic frame
synchronization
Interrupt vector = 10000000.
Remote
Interrupt. When unmasked (RAII =
0) a received RAI will initiate an
interrupt.
01000000.
Alarm Indication Signal Interrupt.
When unmasked (AISI = 0) a
received
interrupt.
01000000.
Channel
Signal Interrupt. When unmasked
(AIS16I = 0), a received AIS16 will
initiate an interrupt. Interrupt vector
= 01000000.
Loss of Signal Interrupt. When
unmasked (LOSI = 0) an interrupt is
initiated when a loss of signal
condition exists. Interrupt vector =
01000000.
Frame
unmasked (FERI = 0), an interrupt
is initiated when an error in the
frame
Interrupt vector = 00100000.
Bipolar
Overflow
unmasked (BPVO = 0), an interrupt
is initiated when the bipolar violation
error counter changes form FFFFH
to 0H. Interrupt vector = 00010000.
SLIP Interrupt. When unmasked
(SLPI = 0), an interrupt is initiated
when a controlled frame slip occurs.
Interrupt vector = 00000100.
Functional Description
alignment
Error
AIS
16
Interrupt
Interrupt
Violation
Alarm
Interrupt.
Alarm
Interrupt.
will
condition
MT9075B
signal
initiate
vector
vector
Indication
Indication
Counter
occurs.
exists.
When
When
an
=
=
35