參數(shù)資料
型號(hào)： CT1999
廠商： Aeroflex Inc.
英文描述： CT1999 Remote Terminal and/or Bus Controller for MIL-STD-1553B
中文描述： CT1999遠(yuǎn)程終端和/或總線控制器的MIL - STD - 1553B總線
文件頁(yè)數(shù)： 8/25頁(yè)
文件大小： 259K
代理商： CT1999
Aeroflex Circuit Technology
SCDCT1999 REV B 8/14/01 Plainview NY (516) 694-6700
8
SA 0-4
SOURCE
Sub Address
- These five lines are a label for the data being transferred. Valid
when INCMD is low.
CWC 0-4
SOURCE
Current Word Count
- These five lines define which data word in the message
is currently being transferred.
SYNC
SOURCE
Synchronize
- Goes low when a synchronize mode code is being serviced.
VECTEN/DWEN
SOURCE
Vector Word Enable/DataWord Enable
- In the RT mode, this signal is
provided to enable the contents of the vector word latch (which is situated in
the subsystem) onto the ASIC’s internal highway. This signal, when in the Bus
Controller mode, is used to enable mode code data from the subsystem onto
the internal highway.
RESET
SOURCE
Reset
- This line pulses low for 500ns on completion of the servicing of a valid
and legal mode command to reset remote terminal.
SSERR
SINK
Subsystem Error
- By taking this line low, the subsystem can set the
Subsystem Flag in the Status Word.
BUSY
SINK
Busy
- This signal should be driven low if the subsystem is not ready to
perform a data transfer to or from the ASIC.
SERVREQ
SINK
Service Request
- This signal should be driven low to request an
asynchronous transfer and left low until the transfer has taken place.
INCLK
SOURCE
Internal Clock (2 MHz)
- This is made available for synchronization use by the
subsystem if required. However, many of the outputs to the subsystem are
asynchronous.
EOT
SOURCE
End of Transmission
- Goes low if a valid sync plus two data bits do not
appear in time to be contiguous with preceding word.
RTADER
SOURCE
Remote Terminal Address Error
- This line goes low if an error is detected in
the RT address parity of the selected receiver. Any receiver detecting an error
in the RT address will turn itself off.
HSFAIL
SOURCE
Handshake Failure
- This line pulses low if the allowable time for DTAK
response has been exceeded during the ASIC/subsystem data transfer
handshaking.
LSTCMD/CWEN
SOURCE
Last Command/Command Word Enable
- This line pulses low when
servicing a valid and legal mode command to transmit last command. When in
RT mode this line must not be used to enable data from the subsystem. This
line also pulses low, when in the Bus Control mode, when a command word is
required for transmission.
STATEN/
STATSTB
SOURCE
Status Enable/Status Strobe
- This line pulses low to enable the status word
onto the internal highway for transmission. When in RT mode this line must not
be used to enable data from the subsystem. This line also pulses high, when in
the Bus Control mode, to strobe received status words into the subsystem.
When PASMON is true this line pulses high for Command and Status words.
BITEN/
RMDSTB
SOURCE
Built In Test Enable/Receive Mode Data Strobe
- This line pulses low when
servicing a valid and legal mode command to transmit the internal BIT word.
This signal is for information only and must not be used to enable data from the
subsystem. This line also pulses high when in the Bus Control mode when
mode data is received to be passed to the subsystem and when data is passed
to the subsystem during PASMON.
DWSYNC
SOURCE
Data Word Sync
- This line goes low if a data word sync and two Manchester
biphase bits are valid.
Pin Description (Cont.)
Signal
Hybrid
Sink or Source
Signal Description
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