參數(shù)資料
型號: IBM32NPR100EXXCAB133
英文描述: Microprocessor
中文描述: 微處理器
文件頁數(shù): 71/131頁
文件大?。?/td> 1679K
代理商: IBM32NPR100EXXCAB133
PRS28.4G
IBM Packet Routing Switch
prs28.03.fm
August 31, 2000
Internal Registers
Page 71 of 131
5.2.15 NoSignal Register
NoSignal
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Reset Value
0
OCM Address
C‘x’
Access Type
Read only
Bits
Description
0 - 15
NoSignal
:Indicates, for each port, if an electrical signal is detected on all DASL lines of the port:
‘1’b:
Indicates that no signal is detected on at least one DASL line of the port. In this case, the output queue
grants (of all priorities) of that port are forced to ‘1’b, no data is transmitted on the corresponding
output port, and the output queue corresponding to that port is flushed (slow flush).
‘0’b:
Signal detected on all lines of the port, or port is disabled (Port Enable (n)=0).
The NoSignal condition is detected whenever a positive (Q) input of a DASL receiver is high impedance.
Bit n of the register corresponds to port n.
Any change in any of those bits generates a NoSignal interrupt.
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