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)： 61/89頁(yè)
文件大?。?/td> 569K
代理商： NHI-1598ET/883
-
63
0249
DATA WORD 3
3333
024A
DATA WORD 4
4444
024B
DATA WORD 5
5555
024C
DATA WORD 6
6666
024D
RECEIVE STATUS WORD 4
0800
MESSAGE 4
ADDRESS
DESCRIPTION
DATA(hex)
0260
CONTROL WORD
0102
0261
RECEIVE COMMAND WORD
F821
0262
MESSSAGE GAP WORD
050
0263
TIME TAG MS WORD
****
0264
TIME TAG LS WORD
****
0265
DATA WORD
BEEF
8.2.0
MESSAGE MONITOR APPLICATIONS
The NHi-ET Message Monitor operation is very similar to that of the Bus Controller . The number
of operations required to initialize the device and to examine results of a data message transfer
has been minimized. Each message can have an associated tag word and/ or an associated 32
bit time tag.
The Message Monitor function of the NHi-ET employs registers embedded in the protocol chip
and its internal ram to perform its various tasks. These tasks include:
Store Bus Messages
Diagnose RT Responses
Data Storage
A Message list, containing the addresses of message tables, is used to keep track of the
message which have been monitored and stored.. The number of message lists and message
tables is limited only by the size of the ram. A list can have up to 1024 messages. A message list
is activated by placing its address in one of the two FRAME START REGISTERS and the list
length in one of the FRAME LENGTH REGISTERS.
The CPU defines the address of the first message table in a message list. After the first message
table has been stored in ram, the ET calculates the address in ram where the next message table
will be stored and writes it into the next contiguous address in the message list. This process
continues, the ET calculating and writing succeeding message table addresses until the frame
length has been reached. The Message Monitor then performs the indicated End- of_ Frame
action.
8.2.1
MESSAGE 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.
8.2.1.1
CONFIGURATION REG 2
Address: 4
Stop at end of current message.
Stop at end of current frame.
Abort - Go off line.
Go default frame.
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