參數(shù)資料
型號： BU-62843G4-290W
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)： 68/99頁
文件大?。?/td> 578K
代理商： BU-62843G4-290W
Data Device Corporation
62743_pre7_noSA-DB.DOC
www.ddc-web.com
8-07-02
70
Table 61. Typical Selective Message Monitor Memory Map
(shown for 4K RAM for "Monitor only" mode)
ADDRESS (HEX)
DESCRIPTION
0100-0101
Not Used
0102
Monitor Command Stack Pointer A (fixed location)
0103
Monitor Data Stack Pointer A (fixed location)
0104-0105
Not Used
0106
Monitor Command Stack Pointer B (fixed location)
0107
Monitor Data Stack Pointer B (fixed location)
0108-027F
Not Used
0280-02FF
Selective Monitor Lookup Table
0300-03FF
Not Used
0400-07FF
Monitor Command Stack A
0800-0FFF
Monitor Data Stack A
Figure 10 illustrates the Selective Message Monitor operation. Upon receipt of a
valid Command Word, the PCI Enhanced Mini-ACE will reference the Selective
Monitor Lookup Table to determine if the current command is enabled. If the
current command is disabled, the PCI Enhanced Mini-ACE monitor will ignore (and
not store) the current message. If the command is enabled, the monitor will create
an entry in the Monitor Command Stack at the address location referenced by the
Monitor Command Stack Pointer, and an entry in the monitor data stack starting at
the location referenced by the monitor data stack pointer.
The format of the information in the data stack depends on the format of the
message that was processed. For example, for a BC-to-RT transfer (receive
command), the monitor will store the command word in the monitor command
descriptor stack, with the data words and the receiving RT's status word stored in
the monitor data stack.
The size of the monitor command stack is programmable, with choices of 256, 1K,
4K, or 16K words. The monitor data stack size is programmable with choices of
512, 1K, 2K, 4K, 8K, 16K, 32K or 64K words.
Monitor Interrupts. Selective monitor interrupts may be issued for End-of-
message and for conditions relating to the monitor command stack pointer and
monitor data stack pointer. The latter, which are shown in Figure 8, include
Command Stack 50% Rollover, Command Stack 100% Rollover, Data Stack 50%
Rollover, and Data Stack 100% Rollover.
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