mt9072av2 Zarlink Semiconductor, mt9072av2 Datasheet - Page 96

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

15.0
The MT9072 has an extensive suite of interrupts consisting of 2 maskable interrupt vectors and 32 maskable
interrupt status registers as shown in Figure 9 and an ST-BUS Analyzer Interrupt. The set bits in the 2 interrupt
vectors identify which of the 32 interrupt status registers is responsible for the interrupt. Reading the corresponding
interrupt status registers identifies the exact source of the interrupt. Any set bit in the interrupt vectors causes the
IRQ pin to toggle low (providing the SPND bit is not set).
Interrupts
R
A
M
R
F
E
7
Interrupt Vector 2
Status Register Address 911
Mask Register Address 903
Interrupt Vector 2
Interrupt Vector 2
M
F
R
A
E
R
6
M
R
A
E
R
F
5
IRQ 2
M
R
A
E
R
F
4
Figure 9 - Interrupt Status Registers
Zarlink Semiconductor Inc.
4
M
F
R
A
E
R
3
4
4
MT9072
Status Register Address 910
Mask Register Address 902
4
Interrupt Vector 1
M
R
A
E
R
F
2
96
Interrupt Vector 1
Interrupt Vector 1
4
4
4
M
R
A
E
R
F
1
4
4
Register
Register
HDLC
Status
HDLC
Status
Mask
033
043
4
4
4
INTA
Framer 0 Master LatchStatus
Rx Sync
Interrupt
Register
Rx Sync
Register
Status
Status
Mask
034
044
Registers 023 - 026
FRAMER 0
Register
Register
RX Line
Rx Line
Status
Status
Mask
035
045
IRQ 1
SPND
ST-BUS
Analyser
Interrupt
Data Sheet
Interrupt
Register
Elastic
Elastic
Status
Status
Store
Mask
036
046
IRQ
Pin