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参数资料
| 型号： | BU-61745G4 |
| 厂商： | DATA DEVICE CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 2 CHANNEL(S), MIL-STD-1553 CONTROLLER, CQFP72 |
| 封装： | 1 X 1 INCH, CERAMIC, GULLWING LEAD PACKAGE-72 |
| 文件页数： | 5/8页 |
| 文件大小： | 89K |
| 代理商： | BU-61745G4 |
5
New Architectural Features: RT Mode
Multiprotocol Compliance
Like the ACE and Mini-ACE, the Enhanced Mini-ACE
provides full compliance to all of the commonly invoked data
bus standards, including MIL-STD-1553A, MIL-STD-1553B
Notice 2, STANAG 3838, General Dynamics 16PP303, and
McAir A3818, A5232, and A5690. For the Enhanced
Mini-ACE RT mode, there is programmable flexibility
enabling the RT to be configured to fulfill any set of system
requirements. This includes the capability to meet the
MIL-STD-1553A response time requirement of 2 to 5
s,
and multiple options for mode code subaddresses, mode
codes, RT status word, and RT BIT word.
RT global circular buffer
Like
the
ACE
and
Mini-ACE,
the
Enhanced
Mini-ACE offers a programmable choice of single buffer
mode, double buffer mode, or circular buffer mode,
programmable on an individual subaddress basis. The
Enhanced Mini-ACE RT architecture provides an additional
option, in that it allows for a variable sized global circular
buffer. The Enhanced Mini-ACE RT allows for a mix of
single buffered, double buffered, and individually circular
buffered subaddresses, along with the use of a global
circular buffer for any arbitrary group of 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 data structure may be
programmed to be either a single message; or a circular
buffer of 128, 256, 512, 1024, 2048, 4096, or 8192 words.
Individual receive subaddresses may be mapped to the
global circular buffer by means of their respective
subaddress control word.
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.
RT and MT: Interrupt status queue
The
Enhanced
Mini-ACE
RT
and
MT
(monitor
terminal) mode include capability to use an interrupt
status queue. As illustrated in Figure 5, this provides a
chronological history of interrupt generating events and
conditions. The interrupt status queue is 64 words deep,
providing the capability to store entries for up to 32
messages. These events and conditions include both
message-related and non-message-related occurrences.
Each message or non-message condition or event that
causes an interrupt results in a two-word entry to be added
to the queue. The first word of the entry is the interrupt
vector; this word indicates which interrupt event(s)/
condition(s) caused the interrupt. The second word is a
parameter. For a message-related interrupt, the parameter
is a pointer to the first word of the RT or MT stack
descriptor (the Block Status Word). For a non-message
There are multiple ways of using the "execute and flip"
functionality. One is to facilitate the implementation of a
double buffering data scheme for individual massages. This
allows the message sequence control processor to
"ping-pong" between a pair of data buffers for a particular
message. By so doing, 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
association with message retries. This allows the BC to
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
bandwidth by eliminating future attempts to process
messages on an RT's failed channel.
General Purpose Queue
The Enhanced Mini-ACE BC allows for the creation of a
general purpose queue. This data structure provides a
means for the message sequence processor to convey
information to the BC host. The BC op code repertoire
provides mechanisms to push various items on this queue.
These include the contents of the Time Tag Register, the
Block Status Word for the most recent message, an
immediate data value, or the contents of a specified
memory address.
Figure 4. Execute and Flip (XQF) Operation
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
相关PDF资料 |
PDF描述 |
|---|---|
| BU-61843F3 | 2 CHANNEL(S), MIL-STD-1553 CONTROLLER, CQFP72 |
| BU-61860B3-601 | 2 CHANNEL(S), MIL-STD-1553 CONTROLLER, PBGA128 |
| BU-63825D1-301 | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQIP70 |
| BU-63925F0-200 | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CDFP70 |
| BU-63925G6-190 | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CDSO70 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| BU-61745G4-100 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| BU-61745G4-110 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| BU61800GWL-E2 | 制造商:ROHM Semiconductor 功能描述: |
| BU-61840B3NEW | 制造商:未知厂家 制造商全称:未知厂家 功能描述:MIL-STD-1553 Components |μ-ACE (Micro-ACE?) |
| BU-61843 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:MIL-STD-1553 Components |Enhanced Mini-ACE? |
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