ACT3492 Series Aeroflex, Inc., ACT3492 Series Datasheet - Page 12

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

Aeroflex Circuit Technology
RTAD 0-4
RTADPAR
BIT DECODE
BCSTEN 1
BCSTEN 0
6MCK (Clock)
IH 08 (LSB)
IH 19
IH 210
IH 311
IH 412
IH 513
IH614
IH715 (MSB)
DTRQ
DTAK
IUSTB
H/L
GBR
NBGT
MEREQ
Signal
Direction
OUTPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
BIDIR
K6,K5
J5,H5
Pin
K10
G5
G6
G9
E4
E9
D6
D7
A9
D8
B9
D9
C9
E8
F4
F5
F6
J6
J4
J9
J7
Pin Description
RT address lines - These should be hardwired by the user.
RTAD4 is the most significant bit.
RT address parity line - This must be hardwired by the user to
give odd parity.
Bitword Decode - When held low, prevents resetting TXTO Bit,
HSFAIL Bit, and LTFAIL Bit in the BIT Word (as well as TF and
SSF Bits in the Status Word) upon receipt of a Transmit Bit
Word Mode Command.
Broadcast command enable Bus 1 - When low the
recognition of broadcast command is prevented on Bus 1.
Broadcast command enable Bus 0 - When low the
recognition of broadcast command is prevented on Bus 0.
6 Megahertz master clock.
Internal Highway - Bi-directional 8 bit highway on which 16 bit
words are passed in two bytes. IH 715 is the most significant bit
of each byte, the most significant byte being transferred first.
The highway should only be driven by the subsystem when data
is to be transferred to the RT.
Data Transfer Request - Goes low to request a data transfer
between the ASIC and subsystem. Goes high at the end of the
transfer.
Data Transfer Acknowledge - Goes low to indicate that the
subsystem is ready for the data transfer.
Interface Unit Strobe - This is a double pulse strobe used to
transfer the two bytes of data
High/Low - Indicates which byte of data is on the internal
highway. Logic level "0" for least significant byte.
Good Block Received - Pulses low for 500ns when a block of
data has been received by the ASIC and has passed all the
validity and error checks.
New Bus Grant - Pulses low whenever a new command is
accepted by the ASIC.
Message Error Request - Positive-going edge will cause
Message Error Bit in Status Word to be set.
12
Signal Description
SCD3492 REV B 6/26/01 Plainview NY [phone]