CT2565 Datasheet, PDF (21/31 Pages) Aeroflex Circuit Technology – CT2565 Bus Controller, Remote Terminal and BUS Monitor FOR MIL-STD-1553B

DYNAMIC BUS CONTROL (00000)
MESSAGE SEQUENCE = DBC * STATUS
The CT2565 responds with status. If the subsystem wants control of the bus, it must set DBACC within 2.5us after NBGRT.
ERROR CONDITIONS
1. Invalid Command. No response, command ignored.
2. Command Followed by Data Word. No status response. Bits set: message error (SW), High word Count (BIT Word).
3. T/R bit Set to Zero. No status response. Bits set: message error (SW), T/R Error (Bit Word).
4. Zero T/R bit and Broadcast Address. No status response. Bits set: message error, broadcast received (SW), Illegal Mode Code, T/R
Error (BIT Word).
5. Broadcast Address. No status response. Bits set: message error, broadcast received (SW), Illegal Mode Code (BIT Word).
SYNCHRONIZE WITHOUT DATA WORD (00001)
MESSAGE SEQUENCE = SYNC * STATUS
The CT2565 responds with status. If sent as a broadcast, the broadcast receive bit will be set and status response suppressed.
ERROR CONDITIONS
1. Invalid Command. No response, command ignored.
2. Command Followed by Data Word. No status response. Bits set: message error (SW), High Word Count (BIT Word).
3. T/R bit Set to Zero. No status response. Bits set: message error (SW), T/R Error (BIT Word).
4. Zero T/R bit and Broadcast Address. No status response. Bits set: message error, broadcast received (SW), Illegal Mode Code, T/R
Error (BIT Word).
TRANSMIT STATUS WORD (00010)
MESSAGE SEQUENCE = TRANSMIT STATUS * STATUS
The status and BIT word registers are not altered by this command and contain the resulting status from the previous command.
ERROR CONDITIONS
1. Invalid Command. No response, command ignored.
2. Command Followed by Data Word. No status response. Bits set: message error (SW), High Word Count (BIT Word).
3. T/R bit Set to Zero. No status response. Bits set: message error (SW), T/R Error (BIT Word).
4. Zero T/R bit and Broadcast Address. No status response. Bits set: message error, broadcast received (SW), Illegal Mode Code, T/R
Error (BIT Word).
5. Broadcast Address. No status response. Bits set: message error, broadcast received (S/W), Illegal Mode code, T/R Error (BIT Word).
INITIATE SELF-TEST (00011)
MESSAGE SEQUENCE = SELF TEST * STATUS
The CT2565 responds with a status word. If the command was broadcast, the broadcast received bit is set and status transmission
suppressed. Short-loop test is initiated on the status word transmitted. If the test fails, an RT fail flag is generated.
ERROR CONDITIONS
1. Invalid Command. No response, command ignored.
2. Command Followed by Data Word. No status response. Bits set: message error (SW), High Word Count (BIT Word).
3. T/R bit Set to Zero. No status response. Bits set: message error (SW), T/R Error (BIT Word).
4. Zero T/R bit and Broadcast Address. No status response. Bits set: message error, broadcast received (SW), T/R Error (BIT Word).
5. Faulty Test. Bits set: terminal flag (SW), A/B Loop Test Fail, Current 1553 Bus (A or B) Loop Test Fail (BIT Word).
TRANSMITTER SHUTDOWN (00100)
MESSAGE SEQUENCE - SHUTDOWN * STATUS
This command is only used with dual redundant bus systems. The CT2565 responds
with status. At the end of the status transmission, the CT2565 inhibits any further transmission from the dual redundant channel. Once
shutdown, the transmitter can only be re-activated by Override Transmitter Shutdown or RESET RT commands.
ERROR CONDITIONS
1. Invalid Command. No response, command ignored.
2. Command Followed by Data Word. No status response. Bits set: message error (SW), High Word Count (BIT Word).
3. T/R bit Set to Zero. No status response. Bits set: message error (SW), T/R Error BIT Word).
4. Zero T/R bit and Broadcast Address. No status response. Bits set: message error, broadcast received (SW), Illegal Mode Code, T/R
Error (BIT Word).
Table 8 – Mode Codes
Aeroflex Circuit Technology
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SCDCT2565 REV B 8/10/99 Plainview NY [phone]