MT9075A
Preliminary Information
Bit
Name
Functional Description
Bit
Name
Functional Description
0
SIGI
Signalling (CAS) Interrupt. When
unmasked and any of the receive
ABCD bits of any channel changes
state an interrupt is initiated. 1 -
unmasked, 0 - masked. Interrupt
vector = 00000001
2
BEROI Bit Error Counter Overflow
Interrupt. When unmasked (BERO
= 1), an interrupt is initiated when
the bit error counter overflows.
Interrupt vector = 00010000.
1
0
AUXPI Auxiliary Pattern Interrupt. When
unmasked (AUXPI = 1), an interrupt
is initiated when the AUXP status bit
of page 03H, address 15H goes
high. Interrupt vector = 01000000.
Table 23 - Interrupt Mask Word One
(Page 01H, Address 1CH)
Bit
Name
Functional Description
CMFOI Receive
CRC-4
Multiframe
Counter Overflow Interrupt. When
unmasked (CMFO = 1), an interrupt
is initiated when the CRC-4
7
EBOI
Receive E-bit Counter Overflow
Interrupt. When unmasked an
interrupt is initiated when the E-bit
multiframe
counter
overflows.
error counter overflows.
1
-
Interrupt vector = 00010000.
unmasked, 0 - masked. Interrupt
vector = 00010000.
Table 24 - Interrupt Mask Word Two
(Page 01H, Address 1DH)
6
5
4
CRCOI CRC-4 Error Counter Overflow
Interrupt. When unmasked an
interrupt is initiated when the CRC-4
error counter overflows.
1
-
unmasked, 0 - masked. Interrupt
vector = 00010000.
CALNI CRC-4 Alignment Interrupt. When
unmasked an interrupt is initiated
when the CALN status bit of page
03H, address 12H changes state. 1
- unmasked, 0 - masked. Interrupt
vector = 00001000.
FEROI Frame Alignment Signal Error
Counter Overflow Interrupt. When
unmasked an interrupt is initiated
when the frame alignment signal
error counter overflows.
1
-
unmasked, 0 - masked. Interrupt
vector = 00010000.
3
JAI
Jitter
Attenuation
Interrupt.
When unmasked, an interrupt will
be initiated when the jitter
attenuator FIFO comes within four
bytes of an overflow or underflow
condition.
masked.
1
-
unmasked,
0
-
=
Interrupt vector
00000100.
Table 24 - Interrupt Mask Word Two
(Page 01H, Address 1DH) (continued)
4-164
MITEL [ MITEL NETWORKS CORPORATION ]
