MT9075B Mitel Networks Corporation, MT9075B Datasheet - Page 28

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

MT9075B
28
HDLC Interrupt Masks (page 0BH&0CH, address 16H)
Bit 7
After a device reset (RESET pin or RST control bit),
interrupts from the following interrupt mask words
are masked:
and the interrupts of mask word zero are unmasked.
All interrupts may be suspended, without changing
the interrupt mask words, by making the SPND
control bit (page 01H, address 1AH) high. Also,
when pin TAIS is held low, all interrupts are
suspended automatically. This allows for system
initialization without spurious interrupts.
Ga
•
•
•
National use bit interrupt mask word
Interrupt mask words one through three.
HDLC interrupt mask word.
EOPD TEOP
EopR
TxFl
FATxU
RxFf
Bit 0
RxOv
Synchronization
D7
10000000
Alarm
D7
01000000
Counter
Indication
D7
00100000
Counter
Overflow
D7
00010000
One Second
D7
00001000
SLIP
D7
00000100
National Use/
HDLC0
D7
00000010
Signalling/
HDLC1
D7
00000001
Category and
Interrupt
Table 11 - MT9075B Interrupt Vectors
Vector
D0
D0
D0
D0
D0
D0
D0
D0
SYNI - Loss of Synchronization.
MFSYI - Loss of Multiframe Sync.
CSYNI - Loss of CRC-4 Sync.
YI - Remote Multiframe Sync. Fail.
RAII - Remote Alarm Indication.
AISI - Alarm Indication Signal.
AIS16I - AIS on Channel 16.
LOSI - Loss of Signal.
AUXPI - Auxiliary Pattern.
EBI - Receive E-bit Error.
CRCI - CRC-4 Error.
CEFI - Consecutive Errored FASs.
FERI - Frame Alignment Signal
Error.
BPVI - Bipolar Violation Error.
RCR0 - RAI and CRC Error Active.
RCR1 - RAI and CRC Error End.
BERI - Bit Error.
EBO - Receive E-bit Error.
CRCO - CRC-4 Error.
FERO - Frame Alignment Signal.
BPVO - Bipolar Violation.
BERO - Bit Error.
CMFO - CRC-4 Multiframe.
1SECI - One Second Timer.
CALNI - CRC-4 Multiframe
Alignment.
T1I - Timer T1 expires.
T2I - Timer T2 expires.
SLPI - Receive Slip.
JAI - Jitter Attenuator Error.
PRBSO-PRBS Error Counter
PRBSI - PRBS Single Error
SanibI - Changed S
SabitI - Changed S
C8SA6I- Sequence of 8 S
nibbles.
SA6I - Changed S
SA5I - Changed S
HDLC0 - Status
SIGI-Receive Signalling Bit
Change.
HDLC1 - Status.
Preliminary Information
(IV7 - IV0)
Interrupt Description
Overflow
a6
a5
a5,6,7 or 8
a5,6,7 or 8
nibbles.
bits.
a6
Bits
Nibble