The BUS-65112 is a complete dual
redundant MIL-STD-1553 Remote
Terminal Unit (RTU) packaged in a
small 1.9” x 2.1” hybrid. Based upon
DDC custom ICs, it includes two
transceivers, two encoder/decoders,
two bit processors, RTU protocol,
data buffers, and timing control
logic. It supports all 13 mode codes
for dual redundant operation, any
combination of which can be illegal-
ized.
Parallel data transfers are accom-
plished with a DMA-type hand-
shaking, compatible with most CPU
types. Data transfers to/from memo-
ry are simplified by the latched com-
mand word and word count out-
puts. Error detection and recovery
are enhanced by BUS-65112 spe-
cial features. A 14-bit built-in-test
word register stores RTU informa-
tion, and sends it to the Bus
Controller in response to the Mode
Command Transmit Bit Word. The
BUS-65112 performs continuous
on-line wraparound self-test, and
provides four error flags to the host
CPU. Inputs are provided for host
CPU control of six bits of the RTU
Status Word.
Its small hermetic package, -55°C to
+125°C
operating
temperature
range, and complete RTU operation
make the BUS-65112 ideal for most
MIL-STD-1553 applications.
DESCRIPTION
MIL-STD-1553 DUAL REDUNDANT
REMOTE TERMINAL HYBRID
FEATURES
Small Size and Low Power
Complete RTU Protocol
Supports 13 Mode Codes:
Any Combination Can be Illegalized
Transfers Data with DMA-Type
Handshaking
Latched Outputs for Command Word
and Word Count
14-Bit Built-in-Test Word Register
Four Error Flag Outputs
Continuous Online Self-Test
Plug-in and Flat Pack Packaging
Custom DDC Monolithics utilized in this product are copyright under the Semiconductor Chip Protection Act.
M
BU-65112/655117 BLOCK DIAGRAM
DATA
BUS A
DATA
BUS B
TRANSCEIVER
ENCODER/
DECODER
BIT
PROCESSOR
TRANSCEIVER
ENCODER/
DECODER
BIT
PROCESSOR
PROTOCOL
SEQUENCER
AND
CONTROL
LOGIC
BUFFER
TRANSFER
CONTROLS
CURRENT
WORD
COUNTER
COMMAND
LATCH
STATUS
REGISTER
ERROR FLAGS
TIMING FLAGS
NBGT
INCMD
BITEN
STATEN
GBR
MESS ERR
RT FAIL
HS FAIL
RTADD ERR
ILL CMD (ME)
SS REQ
ADBC
RT FLAG
SS BUSY
SS FLAG
DAT/CMD
A6-A11
A0-A4
DTREQ
DTGRT
DTACK
DTSTB
R/W
A5
DB0-DB15
BUF ENA
MUX
BUS-65112 DDIP
BUS-65117 Flat Pack
BUS-65112 and BUS-65117
1995, 1999 Data Device Corporation