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參數(shù)資料
| 型號： | DS3160 |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| 中文描述： | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| 文件頁數(shù)： | 107/107頁 |
| 文件大小： | 592K |
| 代理商： | DS3160 |
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DS3160
107 of 107
14. PROGRAMMING GUIDE AND OPERATIONAL NOTES
14.1 Power-Up/Reset Discussion
The DS3160 can be reset as a result of three actions:
Detection of a power transition by the on-chip supply supervisor
Through hardware by toggling the RST device pin
Through software by setting the RST pin located in the MRID register
When a reset is issued, all of the internal registers are forced to their default states. A DS3160 status read
immediately after a reset indicates the following:
MSR:LOTC set and then immediately cleared if the clock is present.
MSR:LIULOS set
SR1:LOS set
SR1:LOF set
BERTECO:RLOS set
HSR:TLWM set
HSR:TEMPTY and REMPTY set
Also, because of the reset, FRD is forced to all 1’s as a result of the LOS and the transmit, Rx monitor,
and Tx monitor ports are tri-stated.
The recommended power-up sequence is (assuming the DS3160 has received a reset):
1)
Wait 100ms after valid power.
2)
Configure LIU, framer, and formatter.
3)
Read status registers to clear transient history.
4)
Read status registers for valid status.
5)
Enable interrupts if used.
6)
Optionally enable transmit, Rx monitor, and Tx monitor ports.
Device behavior notes after a power-up or a reset:
Connecting to an active valid line
LOS and LOF are set
LOS clears
LOF clears
Connecting to a line receiving AIS
LOS and LOF are set
LOS clears
LOF remains set
AIS becomes set
Connecting to a line receiving RAI
LOS and LOF are set
LOS and LOF clear
RAI becomes set
Connecting to a line receiving an
unframed signal
LOS and LOF are set
LOS clear
LOF remains set
Connecting to a dead line
LOS and LOF are set
LOS and LOF remain set
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