參數(shù)資料
型號(hào)： CT2554
廠商： Aeroflex Inc.
英文描述： CT2553 / 2554 / 2555 / 2556 Advanced Integrated MUX (AIM) Hybrid FOR MIL-STD-1553
中文描述： CT2553 / 2554 /二千五百五十六分之二千五百五十五高級(jí)集成復(fù)用器（AIM）的混合的MIL - STD - 1553的
文件頁(yè)數(shù)： 17/36頁(yè)
文件大小： 352K
代理商： CT2554
Aeroflex Circuit Technology
17
SCDCT2553 REV B 8/6/99 Plainview NY (516) 694-6700
RTU MESSAGE BLOCK TRANSFER SEQUENCE
RTU
message
transfer
automatically upon receipt of a valid command
word from the 1553 bus. A message transfer
takes the form of an RTU Start Of Message
(SOM) cycle followed by the 1553 Message
Transfer Cycle and an RTU End Of Message
(EOM) cycle (See Figure 22).
operations
begin
During the RTU SOM cycle, the CT2553 the
following actions:
1. Loads the 1553 command word.
2. Reads the current area Stack Pointer to get the
address of the current Descriptor Stack Entry
(DSE).
3. Stores an SOM flag into the Block Status Word
to indicate a transfer in progress.
4. Writes the Time Tag value into the the
Descriptor Stack.
5. Stores the Command Word received.
6. Reads the associated Data Block Address from
the (current area) Look-Up Table.
The MESSAGE TRANSFER CYCLE refers to the
actual transfer of the 1553 message under control
of the CT2553. The CT2553 transfers data to and
from the memory on a word-by-word basis.
Upon completion of the message transfer, the
CT2553 executes an RTU End Of Message
(EOM) cycle during which the CT2553:
1. Generates an EOM or Error interrupt (if
enabled).
2. Updates the Block Status Word: clears SOM,
sets EOM, and any appropriate error bits.
3. Writes the Time Tag value into the Descriptor
Stack.
4. Increments the Stack Pointer by 4.
Figure 22 – RTU Message Transfer
Operation
MESSAGE COMPLETE
GENERATE EOM INTERRUPT AND
ERROR INTERRUPT IF ERROR
CONDITION DETECTED
INCREMENT STACK POINTER
BY FOUR
UPDATE BLOCK STATUS WORD
AND TIME TAG
TRANSFER DATA TO/FROM
1553 INTERFACE DEVICE
READ LOOK-UP TABLE USING
T/R SUBADDRESS CURRENT
AREA BIT B/A
UPDATE DESCRIPTOR STACK
BLOCK STATUS WORD, TIME
TAG AND COMMAND WORD
READ STACK POINTER
1553 COMMAND WORD
RECEIVED
NO
YES
WAIT FOR NEXT
1553 COMMAND
15
7
6 5 4 3 2 1
0
0 0
0 0 0 0 0 1
1
CURRENT AREA B/A
T/R (from command word)
SUB-ADDRESS (command word)
Figure 20 – RTU Look-Up Address
RECEIVED COMMAND WORDS
DATA BLOCK
T/R
0
0
0
SUBADD
00000
00001
00010
WORD
COUNT
XXXXX
XXXXX
XXXXX
LOOK-UP
TABLE (A)
ADDRESS
0140
0141
0142
*
*
*
017E
017F
DATA BLOCK
USER DEFINED
USER DEFINED
USER DEFINED
64 LOCATIONS
1
1
11110
11111
XXXXX
XXXXX
USER DEFINED
USER DEFINED
Figure 21 – Look-Up Table Example
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CT2554-FP 制造商:AEROFLEX 制造商全稱(chēng):AEROFLEX 功能描述:CT2553 / 2554 / 2555 / 2556 Advanced Integrated MUX (AIM) Hybrid FOR MIL-STD-1553
CT2555 制造商:AEROFLEX 制造商全稱(chēng):AEROFLEX 功能描述:CT2553 / 2554 / 2555 / 2556 Advanced Integrated MUX (AIM) Hybrid FOR MIL-STD-1553
CT2555-FP 制造商:AEROFLEX 制造商全稱(chēng):AEROFLEX 功能描述:CT2553 / 2554 / 2555 / 2556 Advanced Integrated MUX (AIM) Hybrid FOR MIL-STD-1553
CT2556 制造商:AEROFLEX 制造商全稱(chēng):AEROFLEX 功能描述:CT2553 / 2554 / 2555 / 2556 Advanced Integrated MUX (AIM) Hybrid FOR MIL-STD-1553
CT2556-FP 制造商:AEROFLEX 制造商全稱(chēng):AEROFLEX 功能描述:CT2553 / 2554 / 2555 / 2556 Advanced Integrated MUX (AIM) Hybrid FOR MIL-STD-1553
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