參數(shù)資料
型號: 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
文件頁數(shù): 38/89頁
文件大?。?/td> 569K
代理商: NHI-1598ET/883
-
42
STATUS RESPONSE
4.5.0
MESSAGE MONITOR MESSAGE LISTS AND DATA TABLES
The Message Monitor is organized and controlled by message lists, very similar to the BC mode.
Each message list contains the addresses of data tables associated with the list. A message list
can contain up to a maximum of 1024 16 bit addresses.
The number of message lists and data
tables is limited only by the size of the ram.
The message list mapping scheme used by the
monitor is illustrated in the figure. FRAME A/ B POINTER and FRAME A/ B LENGTH registers
have been discussed in a previous section. See details.
The CPU loads the first pointer in each message list. The list is activated by placing its address in
the FRAME A or FRAME B POINTER register and the list length in the corresponding FRAME
LENGTH register.
The ET will calculate all succeeding pointers in the list as it creates message
tables . When the number of pointers is equal to the list length the frame terminates.
Messages can be filtered by RT address. This is accomplished with the two MONITOR
ADDRESS FILTER REGISTERS. See them for details.
The MESSAGE MONITOR begins storing a message when it detects a command sync, providing
the RT address has been enabled in the MONITOR ADDRESS FILTER REGISTERS,
and
stops storing the message when a gap is detected.
MESSAGE MONITOR MEMORY ORGANIZATION
FRAME A/B ADDRESS
MESSAGE LIST
RECEIVE MESSAGE TABLE
REGISTER
4.5.1
MESSAGE MONITOR TAG WORD
The MESSAGE MONITOR TAG WORD contains information which is specific to the message in
its data table. The ET loads these bits as the message is processed.
The TAG WORD is optional and it can be suppressed from the message table. See
Configuration register 3 for details.
15
14
13
12
11
10
9
8
MESSAGE LIST
ADDRESS
POINTER 2
POINTER 1
TAG WORD
COMMAND/STATUS WORD
TIME TAG MS WORD
TIME TAG LS WORD
DATA WORD(S)
POINTER N
MESSAGE LIST
SIZE N
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