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参数资料
| 型号： | BU-62743B3-102 |
| 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, BGA128 |
| 封装： | 0.815 X 0.815 INCH, 0.140 INCH HEIGHT, 1 MM PITCH, BGA-128 |
| 文件页数： | 50/93页 |
| 文件大小： | 504K |
| 代理商： | BU-62743B3-102 |
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Data Device Corporation
62743_pre2.DOC
www.ddc-web.com
8-15-01
54
For the case of a receive (or broadcast receive) message with a data word error,
there is an option such that the lookup table pointer will only be updated following
receipt of a valid message. That is, the pointer will not be updated following
receipt of a message with an error in a data word. This allows failed messages in
a bulk data transfer to be retried without disrupting the circular buffer data
structure, and without intervention by the RT's host processor.
GLOBAL CIRCULAR BUFFER
Beyond the programmable choice of single buffer mode, double buffer mode, or
circular buffer mode, programmable on an individual subaddress basis, the PCI
Enhanced Mini-ACE RT architecture provides an additional option, a variable sized
global circular buffer. The PCI Enhanced Mini-ACE RT allows for a mix of single
buffered, double buffered, and individually circular buffered subaddresses, along
with the use of the global double buffer for any arbitrary
group of
receive(/broadcast) or broadcast subaddresses.
In the global circular buffer mode, the data for multiple receive subaddresses is
stored in the same circular buffer data structure. The size of the global circular
buffer may be programmed for 128, 256, 512, 1024, 2048, 4096, or 8192 words,
by means of bits 11, 10, and 9 of Configuration Register #6. As shown in Table 52,
individual subaddresses may be mapped to the global circular buffer by means of
their respective subaddress control words.
The pointer to the Global Circular Buffer will be stored in location 0101 (for Area
A), or location 0105 (for Area B).
The global circular buffer option provides a highly efficient method for storing
received message data. It allows for frequently used subaddresses to be
mapped to individual data blocks, while also providing a method for
asynchronously received messages to infrequently used subaddresses to be
logged to a common area. Alternatively, the global circular buffer provides an
efficient means for storing the received data words for all subaddresses. Under
this method, all received data words are stored chronologically, regardless of
subaddress.
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| BU-62743B4-190 | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, BGA128 |
| BU-62843B3-122 | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, BGA128 |
| BU-62843B3-150Q | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, BGA128 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| BU-62843 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:MIL-STD-1553 Components |PCI-Enhanced Mini-ACE? |
| BU-62864 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:MIL-STD-1553 Components |PCI-Enhanced Mini-ACE? |
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