ACT3492 Aeroflex, Inc., ACT3492 Datasheet - Page 15

• 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
PASMON
BCOPSTB
BCOPA
BCOPB
REQBUS A
REQBUS B
RT/BC
DBCACC
LTFAIL
ERROR
RTO
TXTO
PARER
Signal
Direction
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
BIDIR
BIDIR
Pin
C10
B10
E5
H6
B4
B3
E2
C3
D3
F8
F7
F2
F3
Pin Description (Cont.)
Passive Monitor - When functioning as a Bus Controller this
line acts as a passive monitor select. The active going edge of
this line will cause the REQBUS lines to be latched and that
bus, now selected will be monitored so long as PASMON
remains low. All traffic on the bus will be handed, after
validation, to the subsystem via STATSTB for status and
commands words, and RMDSTB for data words.
Bus Controller Operation Strobe - When functioning as a Bus
Controller a low going pulse on this line will initiate the selected
bus controller operation on the requested bus, using BCOPA&B
and REQBUSA&B.
Bus Control Operation A - Least significant bit of the bus
controller operation select lines.
Bus Control Operation B - Most significant bit of the bus
controller operation select lines.
Request Bus A - This line, when in RT mode, is the least
significant bit of the bus request lines which specify the origin of
the command, i.e. they are sources. When in BC mode these
lines are sinks and specify which bus is to be used for the next
command.
Request Bus B - Most significant bit of the bus request lines.
(See above for description.)
Remote Terminal/Bus Control - This line when high causes
the ASIC to function as a remote terminal. When low the ASIC
functions as a bus controller or passive monitor.
Dynamic Bus Control Accept - This line should be
permanently tied low if a subsystem is able to accept control of
the bus if offered.
Loop Test Fail - This line goes low if any error in the transmitted
waveform is detected or if any parity error in the hardwired RT
address is detected.
Error - This line latches low if a Manchester or parity error is
detected. It is reset by the next CMSYNC (RT mode) and also
by RTO in the BC mode.
Reply Time Out - This signal will pulse low whenever the reply
time for a transmitting terminal has been exceeded. This line is
intended for the bus controller use.
Transmitter Time Out - This line latches low if the transmitter
time out limits are exceeded.
Parity Error - This line will pulse low if a parity error is detected
by the decoder.
15
Signal Description
SCD3492 REV B 6/26/01 Plainview NY [phone]