參數(shù)資料
型號(hào): A42MX24-2TQ100A
廠商: Electronic Theatre Controls, Inc.
英文描述: 40MX and 42MX FPGA Families
中文描述: 40MX和42MX FPGA系列
文件頁數(shù): 18/93頁
文件大小: 854K
代理商: A42MX24-2TQ100A
25
Data Device Corporation
www.ddc-web.com
BU-6474X/6484X/6486X
J-07/05-0
GENERAL PURPOSE QUEUE
The Mini-ACE Mark3 BC allows for the creation of a general pur-
pose queue. This data structure provides a means for the mes-
sage sequence processor to convey information to the BC host.
The BC op code repertoire provides mechanisms to push vari-
ous items on this queue. These include the contents of the Time
Tag Register, the Block Status Word for the most recent mes-
sage, an immediate data value, or the contents of a specified
memory address.
FIGURE 5 illustrates the operation of the BC General Purpose
Queue. Note that the BC General Purpose Queue Pointer
Register will always point to the next address location (modulo
64); that is, the location following the last location written by the
BC message sequence control engine.
If enabled, a BC GENERAL PURPOSE QUEUE ROLLOVER
interrupt will be issued when the value of the queue pointer
address rolls over at a 64-word boundary. The rollover will always
occur at a modulo 64 address.
LAST LOCATION
BC GENERAL
PURPOSE QUEUE
(64 Locations)
BC GENERAL
PURPOSE QUEUE
POINTER
REGISTER
NEXT LOCATION
FIGURE 5. BC GENERAL PURPOSE QUEUE
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A42MX24-2VQ100A 40MX and 42MX FPGA Families
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