參數(shù)資料
型號(hào)： NHI-1598ET/883
廠商： NATIONAL HYBRID INC
元件分類： 微控制器/微處理器
英文描述： 2 CHANNEL(S), MIL-STD-1553 CONTROLLER, CPGA69
封裝： 1.100 X 1.100 INCH, CERAMIC, PLUG IN, PGA-69
文件頁(yè)數(shù)： 64/89頁(yè)
文件大?。?/td> 569K
代理商： NHI-1598ET/883
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66
internal ram to perform its various tasks. These tasks include:
Store Bus words
Diagnose RT Responses
Data Storage
A data block, containing the bus word ,tag word and time tag, is used to store the monitored
data.. The begining of the data block is determined by the address placed in the BLOCK START
REGISTER and the end of the data block is determined by the address in the BLOCK END
REGISTER.
The BLOCK END REGISTER works inconjunction with the LAST ADDRESS REGISTER. Since a
bus word can occupy up to four words in ram, tag word + 2 time tag words, the address in the
BLOCK END REGISTER could occur on any of these four words. In order to keep the four words
of the last ram entry contiguous in ram, the Word monitor uses the LAST ADDRESS REGISTER
to store the address of the last word in the data block. The ET calculates this address and puts it
in the LAST ADDRESS REGISTER. This address could be identical to that in the BLOCK END
REGISTER or up to three addresses greater; therefore, always reserve the four addresses after
the address in the BLOCK END REGISTER for this contingency.
8.3.1
WORD MONITOR REGISTERS
This a brief description of the Message Monitor registers and their role. Specific bit functions are
given in the address map section of this manual. Only the functions pertinent to the Message
Monitor are described here.
CONFIGURATION REG 2
Address: 4
Stop at end of current message.
Stop at end of current frame.
Abort - Go off line.
Go default frame .
8.3.1.2
CONFIGURATION REG 1
Address: 9
Mode select - RT, BC, MT.
Start MT.
Select default frame A or B.
Select Message or Word monitor.
8.3.1.3
BLOCK “A” START
Address: 13
Holds address of a selected MT message list.
8.3.1.4
BLOCK “A” END
Address: 14
Holds number of messages in frame A message list.
End of frame A options - Stop, Repeat , Go Alternate.
Interrupt at end of frame.
8.3.1.5
BLOCK “B” START
Address: 16
Holds address of a selected MT message list.
8.3.1.6
BLOCK “B” END
Address: 17
Holds number of messages in frame B message list.
End of frame B options - Stop, Repeat , Go Alternate.
Interrupt at end of frame.
8.3.1.7
CONDITION REGISTER
Address: 19
Current BC frame A or B.
End of frame A.
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