mt9072av2 Zarlink Semiconductor, mt9072av2 Datasheet - Page 98

• Manufacturer Part Number: mt9072av2
• Description: Octal T1/e1/j1 Framer
• Manufacturer: Zarlink Semiconductor

15.2.1
1. The IRQ pin goes low.
2. Read all 33 interrupt vector status registers. The bits which are set in these registers identify the source of the
interrupt. As each register is read, it is cleared (all bits set to 0). When all registers are clear, the interrupt is cleared
(the IRQ pin returns to logic high) and all sources of the interrupt are identified.
15.2.2
1. The IRQ pin goes low.
2. Read the interrupt vectors. These vectors identify which of the 33 (or which combination of 33) interrupt status
registers has bits which are set. Note that if multiple framers (i.e. Framer 1 and 7), or multiple conditions (i.e., Sync
and Counter Overflow) caused the interrupt, more than one register may need to be read.
3. Read the interrupt status register(s) identified in step 2. The bits which are set in these registers identify the source
of the interrupt. As each register is read, it is cleared (all bits set to 0). When all interrupt status registers are cleared,
the interrupt vector goes to zero and the IRQ pin returns to logic high.
15.3
Address Bit Name
Interrupt Vector
911
911
911
911
911
911
911
911
911
911
911
911
911
911
911
911
T1 Interrupt Vector and Interrupt Source Summary
Polling Method
Vector Method
F7HVS
F6HVS
F5HVS
F4HVS
F7EVS
F7RVS
F7SVS
F6EVS
F6RVS
F6SVS
F5EVS
F5RVS
F5SVS
F4EVS
F4RVS
F4SVS
Table 50 - Interrupt Vector and Interrupt Source Summary (T1)
Interrupt Vector Mask
Address
903
903
903
903
903
903
903
903
903
903
903
903
903
903
903
903
Bit Name
F7HM
F7RM
F6HM
F6RM
F5HM
F5RM
F4HM
F4RM
F7EM
F7SM
F6EM
F6SM
F5EM
F5SM
F4EM
F4SM
Zarlink Semiconductor Inc.
Status Address
MT9072
Registers
Interrupt
98
733
734
735
736
633
634
635
636
533
534
535
536
433
434
435
436
Mask Address
743
744
745
746
643
644
645
646
543
544
545
546
443
444
445
446
Register Name
Receive Sync
Receive Sync
Receive Sync
Receive Sync
Receive Line
Receive Line
Receive Line
Receive Line
Elastic store
Elastic
Elastic
Elastic
HDLC
HDLC
HDLC
HDLC
Data Sheet
Framer
7
7
7
7
6
6
6
5
5
5
4
4
4
6
5
4