ACT3492 Aeroflex, Inc., ACT3492 Datasheet - Page 13

• Manufacturer Part Number: ACT3492
• Description: MIL-STD-1553B Remote Terminal, BUS Controller or Passive Monitor Hybrid with Status Word Control Dua
• Manufacturer: Aeroflex, Inc.

Aeroflex Circuit Technology
TX/RX
INCMD
WC0-WC4
SA0-SA4
CWC0-CWC4
SYNC
VECTEN/DWEN
RESET
SSERR
BUSY
SERVREQ
INCLK
EOT
RTADER
Signal
Direction
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
INPUT
INPUT
INPUT
J10,K8
B7,C8
H7,K3
H4,H8
A6,B6
K4,J8
Pin
H10
G10
G7
G8
K9
A4
H2
K1
C4
A5
C7
A3
H9
A1
Pin Description (Cont.)
Transmit/Receive - The state of this line informs the subsystem
whether it is to transmit or receive data. The signal is valid while
INCMD is low.
In Command - Goes low when the RT is servicing a valid
command. The subaddress and word count lines are valid while
the signal is low.
Word Count - These five lines specify the requested number of
data words to be received or transmitted. Valid when INCMD is
low.
Sub Address - These five lines are a label for the data being
transferred. Valid when INCMD is low.
Current Word Count - These five lines define which data word
in the message is currently being transferred.
Synchronize - Goes low when a synchronize mode code is
being serviced.
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 - This line pulses low for 500ns on completion of the ser-
vicing of a valid and legal mode command to reset remote ter-
minal.
Subsystem Error - By taking this line low, the subsystem can
set the Subsystem Flag in the Status Word.
Busy - This signal should be driven low if the subsystem is not
ready to perform a data transfer to or from the ASIC.
Service Request - This signal should be driven low to request
an asynchronous transfer and left low until the transfer has
taken place.
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.
End of Transmission - Goes low if a valid sync plus two data
bits do not appear in time to be contiguous with preceding word.
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.
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Signal Description
SCD3492 REV B 6/26/01 Plainview NY [phone]