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參數(shù)資料
| 型號： | BU-62843G3-460S |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72 |
| 封裝： | 1 INCH, CERAMIC, QFP-72 |
| 文件頁數(shù)： | 69/99頁 |
| 文件大小： | 578K |
| 代理商： | BU-62843G3-460S |
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Data Device Corporation
62743_pre7_noSA-DB.DOC
www.ddc-web.com
8-07-02
71
The 50% rollover interrupts may be used to inform the host processor when the
command stack or data stack is half full. At that time, the host may proceed to read
the received messages in the upper half of the respective stack, while the PCI
Enhanced Mini-ACE monitor writes messages to the lower half of the stack. Later,
when the monitor issues a 100% stack rollover interrupt, the host can proceed to
Figure 10. Selective Message Monitor Memory Management
read the received data from the lower half of the stack, while the PCI Enhanced
Mini-ACE monitor continues to write received data words to the upper half of the
stack.
INTERRUPT STATUS QUEUE
Like the PCI Enhanced Mini-ACE RT, the Selective Monitor mode includes the
capability for generating an interrupt status queue. As illustrated in Figure 9, this
provides a chronological history of interrupt generating events. Besides the two
Interrupt Mask Registers, the Interrupt Status Queue provides additional filtering
capability, such that only valid messages and/or only invalid messages may result
in entries to the Interrupt Status Queue. The interrupt status queue is 64 words
deep, providing the capability to store entries for up to 32 monitored messages.
15
13
0
BLOCK STATUS WORD
TIME TAG WORD
DATA BLOCK POINTER
RECEIVED COMMAND
WORD
CONFIGURATION
REGISTER #1
MONITOR COMMAND
STACK POINTERS
MONITOR
COMMAND STACKS
CURRENT
AREA B/A
MONITOR DATA
STACKS
MONITOR DATA
BLOCK #N + 1
MONITOR DATA
BLOCK #N
CURRENT
COMMAND WORD
MONITOR DATA
STACK POINTERS
IF THIS BIT IS "0" (NOT SELECTED)
NO WORDS ARE STORED IN EITHER
THE COMMAND STACK OR DATA STACK.
IN ADDITION, THE COMMAND AND DATA
STACK POINTERS WILL NOT BE UPDATED.
NOTE
SELECTIVE MONITOR
LOOKUP TABLES
SELECTIVE MONITOR
ENABLE
(SEE NOTE)
OFFSET BASED ON
RTA4-RTA0, T/R, SA4
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