Preliminary Information
MT9075A
Bit
Name
Functional Description
Bit
Name
Functional Description
7
MFSYI Multiframe
Synchronization
When unmasked
3
1SECI One Second Status Interrupt.
When unmasked (1SECI = 1), an
interrupt is initiated when the 1SEC
status bit (page 03H, address 12H,
bit 7) changes from zero to one.
Interrupt vector = 00001000.
Interrupt.
(MFSYI = 1), an interrupt is initiated
when multiframe synchronization is
lost. Interrupt vector = 10000000.
6
CSYNI CRC-4
Multiframe
Synchronization Interrupt. When
unmasked (CSYNI = 1), an interrupt
is initiated when CRC-4 multiframe
synchronization is lost. Interrupt
vector = 10000000.
2
1
0
T1I
T2I
- - -
T1
Timer
Interrupt.
When
unmasked (T1I = 1), an interrupt is
initiated when the T1 timer bit (page
03H, address 12H, bit 5) changes
from zero to one. Interrupt vector =
00001000.
5
4
- - -
YI
Unused.
T2
Timer
Interrupt.
When
Remote Signalling Multiframe
Alarm Interrupt. When unmasked
(YI = 1), an interrupt is initiated
when a remote signalling multiframe
alarm signal is received. Interrupt
vector = 10000000.
unmasked (T2I = 1), an interrupt is
initiated when the T2 timer bit (page
03H, address 12H, bit 4) changes
from zero to one. Interrupt vector =
00001000.
Unused
Table 25: Interrupt Mask Word Three
(Page 01H, Address 1EH)
Table 25: Interrupt Mask Word Three
(Page 01H, Address 1EH)
Bit
Name
Functional Description
Unused. Set low for normal operation.
7-3
2-0
---
TX2-0 Transmit pulse amplitude. Select the
TX2-TX0 bits according to the line type,
value of termination resistors (R ), and
T
transformer turns ratio used
TX2 TX1 TX0 Line(Ω) R (Ω) Xfmr
T
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
1
1
120
120
120
0
0
1:2
1:1
1:2
1:2
1:2
1:1
1:2
1:2
15
120/75 12.1
75
75
75
0
0
9.1
75/120 12.1
Table 26: Transmit Pulse Control Word
4-165
MITEL [ MITEL NETWORKS CORPORATION ]
