參數(shù)資料
型號(hào): CT2565-201-1
廠商: Aeroflex Inc.
英文描述: CT2565 Bus Controller, Remote Terminal and BUS Monitor FOR MIL-STD-1553B
中文描述: CT2565總線控制器,遠(yuǎn)程終端和總線監(jiān)測(cè)的MIL - STD - 1553B總線
文件頁(yè)數(shù): 16/31頁(yè)
文件大?。?/td> 356K
代理商: CT2565-201-1
Aeroflex Circuit Technology
16
SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700
Figure 16 – RT Receive Command Timing
EOM
(57)
NRGRNT
(42)
INCMD
(9)
D0 - D15
(REQ, GRNT, ACK)
HANDSHAKE
BCSTRCV
(75)
1553 BUS
NODT (71)
(CS, WR, ADRINC)
MEM-WRITE
STAT
RT
A
P
CMD
RT
A
RCV P
DATA
(16 BITS)
P
3.9μs
10.75±0.75μs
Note: All timing is typical unless otherwise noted.
SOM
(78)
STATEN (3)/
BUFFENA (58)
CHA/CHB (16)
WC
0-4
T/R (15)
REF
7.5±0.5μs
5.5±0.5μs
4.5±0.5μs
7.5±0.5μs
3.4±0.5μs
0.5μs
1.5μs
3.2±0.5μs
5.5±0.5μs
4μs
400ns
667ns
166ns
CMD
DATA
STAT
Use of Status Word
The status word may be captured by the
subsystem as it is transmitted to the 1553 port by
pulsing BUFENA (pin 58) low during STATEN (pin
3: 520ns low pulse). Data becomes valid
approximately 50ns after the falling edge of
BUFENA.
This
corresponds
non-broadcast
message
TRANSMIT STATUS WORD mode command.
Note that the status word may be transmitted prior
to an error condition (See Transmit CMD). These
conditions will be indicated in the "next" status
word and may be monitored if the BC requests the
SW before it is altered (See Mode Commands).
with
and
all
the
transfers
Subsystem Control
The CT2565 allows the subsystem total control
over the status word flags using the inputs
indicated in Table 7.
BIT Word
The BIT Word (Built-In-Test) becomes available in
response to a TRANSMIT BIT WORD mode
command
and
provides
information (See Figure 19) to that provided by the
status word. The subsystem may capture the BIT
word on the parallel data bus by pulsing BUFENA
additional
status
(pin 58) low during BITEN (pin 43: approximately
520ns low pulse). Data Becomes valid
approximately 50ns after the falling edge of
BUFENA. Like the status word, the BIT word
cannot be altered by the subsystem.
PIN
#
SYMBOL
DESCRIPTION
6
DBACCEPT
RT accepts BC operation
responsibility (See Table 2).
Transmitted data may be
invalid sets SSFLAG bit.
Service Request; see
Transmit Vector mode
command.
RTU fault exists: sets
TERMINAL FLAG bit.
Subsystem cannot service
1553 request at this time.
Mode command subsystem
illegalization: Sets MSGERR
bit, doesn’t suppress status
word.
7
SSFLAG
8
SVCREQ
10
SSER
47
SSBUSY
48
ILLCMD
Table 7 – Subsystem Control of RT-Status
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