- 您现在的位置：买卖IC网 > PDF目录210377 > BU-61865F4-120Y (DATA DEVICE CORP) 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72 PDF资料下载
参数资料
| 型号： | BU-61865F4-120Y |
| 厂商： | DATA DEVICE CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72 |
| 封装： | 25.40 X 25.40 MM, 3.94 MM HEIGHT, CERAMIC, FP-72 |
| 文件页数： | 14/60页 |
| 文件大小： | 457K |
| 代理商： | BU-61865F4-120Y |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页
21
Data Device Corporation
www.ddc-web.com
BU-6174X/6184X/6186X
F-10/02-300
BC MESSAGE SEQUENCE CONTROL
The Enhanced Mini-ACE/-ACE BC message sequence control
capability enables a high degree of offloading of the host proces-
sor. This includes using the various timing functions to enable
autonomous structuring of major and minor frames. In addition,
by implementing conditional jumps and subroutine calls, the
message sequence control processor greatly simplifies the
insertion of asynchronous, or "out-of-band" messages.
Execute and Flip Operation. The Enhanced Mini-ACE/-ACE
BC's XQF, or "Execute and Flip" operation, provides some
unique capabilities. Following execution of this unconditional
instruction, if the condition code tests TRUE, the BC will modify
the value of the current XQF instruction's pointer parameter by
toggling bit 4 of the pointer. That is, if the selected condition flag
tests true, the value of the parameter will be updated to the
value = old address XOR 0010h. As a result, the next time that
this line in the instruction list is executed, the Message
Control/Status Block at the updated address (old address XOR
0010h) will be processed, rather than the one at the old address.
The operation of the XQF instruction is illustrated in FIGURE 4.
There are multiple ways of utilizing the "execute and flip" instruc-
tion. One is to facilitate the implementation of a double buffering
data scheme for individual messages. This allows the message
sequence control processor to "ping-pong" between a pair of
data buffers for a particular message. By doing so, the host
processor can access one of the two Data Word blocks, while the
BC reads or writes the alternate Data Word block.
A second application of the "execute and flip" capability is in con-
junction with message retries. This allows the BC to not only
switch buses when retrying a failed message, but to automati-
cally switch buses permanently for all future times that the same
message is to be processed. This not only provides a high
degree of autonomy from the host CPU, but saves BC band-
width, by eliminating the need for future attempts to process
messages on an RT's failed channel.
XQF
POINTER
XX00h
(part of) BC INSTRUCTION LIST
MESSAGE
CONTROL/STATUS
BLOCK 0
DATA BLOCK 0
XX00h
MESSAGE
CONTROL/STATUS
BLOCK 1
DATA BLOCK 1
POINTER
FIGURE 4. EXECUTE and FLIP (XQF) OPERATION
相关PDF资料 |
PDF描述 |
|---|---|
| BU-61865G3-110Z | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72 |
| BU-61865G3-150K | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72 |
| BU-61865G3-172Z | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72 |
| BU-61865G4-140Q | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72 |
| BU-61703F3-120S | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| BU-61865G3-100 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| BU-61865G3-110 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| BU-61865G4-100 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| BU-61865G4-110 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| BU-61XXX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:MINIATURE ADVANCED COMMUNICATION ENGINE (MINI-ACE) AND MINI-ACE PLUS |
发布紧急采购，3分钟左右您将得到回复。