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參數(shù)資料
| 型號： | LXT334&LXT304A |
| 英文描述： | LXT334 & LXT304A - LXT334 & LXT304A ?Low Cost & High Performance Quad E1 Interface Solution |
| 中文描述： | LXT334 |
| 文件頁數(shù)： | 17/32頁 |
| 文件大?。?/td> | 395K |
| 代理商： | LXT334&LXT304A |
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Dual T1/E1 Line Interface Unit
—
LXT331
Datasheet
17
Figure 7. LXT331 Interrupt Handling
Mask
Interrupts
Mask
Which
Interrupts
Does an
Interrupt
Condition
Exist
Read Output Status Word*
(Bits D5-D7=Operating
Mode)
*Regardless of Interrupt
Status, bit
D0 indicates DPM status,
D1 indicates DPM status
and D2 - D4 indicate LEN
status
(No interrupt)
Int = High
No
Read Output Status Word*
(Bits D5-D7=interrupt
status)
Int = Low
(interrupt)
Yes
Are
Both
Interrupt
Conditions
Masked
No
Yes
No
Read Output Status Word*
(Bits D5-D7=Operating Mode)
Write "1" to D0
of Input Status
Word to Mask
DPM Interrupt
Write "1 1" to
D0-D1 of Input
Status Word to
Mask DPM &
DFM Interrupt
Write "1" to D1
of Input Status
Word to Mask
DFM Interrupt
Yes
INT goes HIGH
What
Interrupt
Condition
Exists
Write "1" to D0
of Input Status
Word to
Re-enable DPM
Interrupt
Write "1 1" to
D0-D1 of Input
Status Word to
Re-enable DPM
& DFM Interrupt
Write "1" to D1
of Input Status
Word to
Re-enable DFM
Interrupt
Write "0" to D0 of Input
Status Word to
Re-enable DPM
Interrupt
Write "0 0" to D0-D1 of
Input Status Word to
Re-enable DPM &
DFM Interrupts
Write "0" to D1 of Input
Status Word to
Re-enable DFM
Interrupt
Re-Enable
which
Interrupts
Re-Enable
Interrupts
DFM
DPM
DPM & DFM
*Regardless of Interrupt
Status, bit
D0 indicates DPM status
D1 indicates DPM status
and D2 - D7 indicate
LEN status
DFM
DPM
DFM AND DPM
No
Yes
DFM
DPM
DFM AND DPM
Start-up or
Restart
Interrupts
enabled
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