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PDF CT2565-001-1 Data sheet ( Hoja de datos )
| Número de pieza | CT2565-001-1 | |
| Descripción | CT2565 Bus Controller/ Remote Terminal and BUS Monitor FOR MIL-STD-1553B | |
| Fabricantes | Aeroflex Circuit Technology | |
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CT2565
Bus Controller, Remote Terminal and BUS Monitor
FOR MIL-STD-1553B
Features
I Second Source Compatible to the BUS-65600
I RTU implements all dual redundant mode codes
I Selective mode code illegalization available
I 16 bit microprocessor compatibility
I BC checks status word for correct address and set flags
I RTU illegal mode codes externally selectable
I 16 bit µProcessor compatibility
I DMA handshaking for subsystem message transfers
I MIL-PRF-38534 compliant circuits available
I DESC SMD #5962–88585 Pending
I Packaging – Hermetic Metal
• 78 Pin, 2.1" x 1.87" x .25" Plug-In type package
• 82 Lead, 2.2" x 1.61" x .18" Flat package
CIRCUIT TECHNOLOGY
www.aeroflex.com
FLEX LA
ISO
9001
CE R T I F I E D
General Description
The CT2565 is a dual redundant MIL-STD-1553 Bus Controller (BC), Remote Terminal (RT), and
Bus Monitor, (BM) Bus packaged in a 1.9" x 2.1" hermetic hybrid. It provides all the functions
required to interface a MIL-STD-1553 dual redundant serial data bus transceiver, (Aeroflex's
ACT4487 for example) and a subsystem parallel three-state data bus. Utilizing a custom monolithic
IC, the CT2565 provides selectable operation as a Bus Controller, Remote Terminal or a Bus
Monitor (BM).
The CT2565 is compatible with most µprocessors. It provides a 16 bit three-state parallel data bus
and uses direct memory access (DMA type) handshaking for subsystem transfers. All message
transfer timing as well as DMA and control lines are provided internally. Subsystem overhead
associated with message transfers is therefore minimized. Interface control lines are common for
both BC and RT operation.
The CT2565 features the capability for implementing all dual redundant MIL-STD-1553 mode
codes. In addition, any mode code may (optional) be illegalized through the use of an external
(200ns access time) PROM. Complete error detection capability is provided, for both BC and RTU
operation. Error detection includes: response time-out, inter message gaps, sync, parity,
Manchester, word count and bit count. The CT2565 complies with all the requirements of
MIL-STD-1553.
The hybrid is screened in accordance with the requirements of MIL-STD-883 and operates over the
full military temperature range of -55°C to +125°C.
eroflex Circuit Technology – Data Bus Modules For The Future © SCDCT2565 REV B 8/10/99
1 page  
RECEIVE
Control Word
Receive Command
Data 1
•
•
Last Data
Looped Data Word
RTU Status
TRANSMIT
Control Word
Transmit Command
Looped Command Word
RTU Status
Data 1
•
•
Last Data
Table 3 – BC Memory Allocation
Loop Test
Upon receipt from the subsystem, the last word
to be transmitted within a given message
transfer (command or Data word) is stored in a
CT2565 internal register. As this word is
transmitted to the 1553 bus, it is looped back
through the active receiver channel for auto-BC,
Short Loop verification. A LOOPERR (.5us typ)
low pulse indicates a mismatch between the
stored and looped word. The CT2565 also
initiates a handshake with a memory write to the
subsystem for user-defined, "long loop"
(subsystem, CT2565, subsystem) verification.
Note that both short and long loop testing are
initiated for all transfers (on the last word
transmitted to 1553). Subsystems response to
use Long Loop Test is to compare the loaded
word to what was looped back into memory.
15 8
NOT USED
BUS CHANNEL A/B
NOT USED
MASK BROADCAST BIT
NOT USED
MODE CODE
BROADCAST
RT-RT
0
BIT DEFINITION
BUS CHANNEL A/B
MASK BROADCAST BIT
MODE CODE
BROADCAST
RT-RT
When logic "1" transmits over 1553 Bus A.
When logic "0" transmits over 1553 Bus B
(See note)
Always set to "0"
Command Word count field signifies mode code type
Multiple RTU’s addressed, no status word expected
When set, RTU(b) transmits, RTU(a) receives. Both RTU Status Words
are validated and sent to subsystem.
Note: Messages-transmission (routing) status pin (pin 16, Chan A/B) becomes active after loading the control word and command word
respectively. The signal is cleared by RESET or EOM low.
Figure 4 – BC Control Word
Aeroflex Circuit Technology
5 SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700
5 Page 
1553 BUS
CMD RTA P
STAT RTA P DATA LCMD P
INCMD (9)
BUSREQ (19)
ADRINC (49)
D0 - D15
LWORD (29)
EOM (57)
CTL CMD
70/80µs
900ns
80/166ns
LOOP
STAT
5.0±0.5µs
LCMD
400/500ns
Figure 10 – BC Mode Code Transmit Last Command (10010) Timing
1553 BUS
INCMD (9)
BUSREQ (19)
ADRINC (49)
D0 - D15
LWORD (29)
EOM (57)
CMD RTA P
STAT RTA P
CTL CMD
50/80µsec
900ns
80/166ns
LOOP
40/60µsec
STAT
400/500ns
Notes:
All timing is typical unless otherwise noted.
Figure 11 – BC Mode Code Transmit Status Word (00010) Timing
RTU Operation
Each RTU is assigned a unique address on the
1553 bus. It processes commands issued by the
BC to its address or through Broadcast
commands.
Upon receipt of a valid command in the RTU
mode, the CT2565 will attempt to (1) transfer
1553 data received to the subsystem, (2) read
data from the subsystem for transmission on the
1553 bus, (3) transmit status information to 1553,
or (4) set status conditions. All data block
transfers are accompanied by a 1553 Status
Word. Figure 12 details a RTU single message
transfer.
RTU Address
RTU Address pins 33-34 and 72-74 and Address
Parity pin (odd parity) should be programmed to
a unique RTU (1553) address. These inputs
have internal pull-ups and will default a high state
if left unconnected. The CT2565 will not respond
if odd parity is compromised (See Error
Handling).
RTU Initialization
Initialize the CT2565 as an RTU per Table 2.
Upon receipt of valid command word from the
serial bus (RTU addressed or broadcast CMD),
the CT2565 will pulse NBGRNT (New Bus Grant)
pin 42 low.
Aeroflex Circuit Technology
11 SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CT2565-001-1.PDF ] | |
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