UT1553B/BCRTMP-WPA 데이터 시트보기 (PDF) - Aeroflex UTMC
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UT1553B/BCRTMP-WPA Datasheet PDF : 78 Pages
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1.3 Features - Multiple Protocol
Since the inception of the loosely defined MIL-STD-1553A
in 1973, various “1553 standards” have developed, all with
their own peculiarities. The UT1553 BCRTMP addresses
MIL-STD-1553A, MIL-STD-1553B, McDonnell Douglas
A3818, McDonnell Douglas A5232, McDonnell Douglas
A5690, and Grumman Aerospace SP-G-151A. While the
part was designed with these “standards” specifically in
mind, the BCRTMP’s flexibility permits conformance to
nearly any conceivable “1553-like standard.” The basic
differences among the various “standards” fall into five
categories:
1) Status Word Definition
2) Mode Code Definition
3) Use of Broadcast
4) Message Error Handling
5) Remote Terminal (RT) Response Time
Status Word Definition
The BCRTMP can operate in a mode where the status word
is defined in strict conformance with MIL-STD-1553B, or
it can operate in a more flexible mode. In this flexible status
word mode, the user can program the individual status word
bits using internal registers.
Mode Code Definition
The designer can place the BCRTMP in an operational mode
so that the device performs in strict conformance with the
mode code definitions for MIL-STD-1553B. The designer
may also opt not to automatically execute mode codes,
providing flexibility in mode code definition and
illegalization.
Use of Broadcast
The BCRTMP has a programmable mode option that allows
the user to determine whether to allow broadcast commands
in a system.
Message Error Handling
Some 1553 protocols (e. g., MIL-STD-1553B) consider any
message error reason to discard the entire message and
suppress status word transmission, while others
(e. g., McDonnell Douglas A3818) define the required
activity according to message error severity. The BCRTMP
can be programmed to conform to either requirement.
Remote Terminal (RT) Response Time
The BCRTMP offers two methods of legalization (Bus
Legalization and DMA Legalization), which the designer
selects depending on the required RT response time.
BCRTMP-4
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