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| 型号： | BU-64703B9-200 |
| 厂商： | DATA DEVICE CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CBGA80 |
| 封装： | CERAMIC, BGA-80 |
| 文件页数： | 26/48页 |
| 文件大小： | 405K |
| 代理商： | BU-64703B9-200 |
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32
Data Device Corporation
www.ddc-web.com
BU-64703
D-03/06-0
DETAILED MODE CODES FUNCTIONAL DESCRIPTION
The applicable Mode Codes for the SSRT Mark3 are described below:
DYNAMIC BUS CONTROL ( T/R = 1; 00000)
MESSAGE SEQUENCE = DBC + STATUS
The SSRT Mark3 responds with Status showing non-acceptance of the mode code command.
ERROR CONDITIONS
1. Invalid Command. No response, command ignored.
2. Command Followed by Data Word. No Status response. Set Message error bit (Status Word), High Word Count (BIT Word).
3. T/R bit Set to Zero. No Status response. Set Message Error bit (Status Word), Command Word Contents Error (BIT Word).
4. Zero T/R bit and Broadcast Address. No Status response. Set Message Error and Broadcast Received bits (Status Word),
Command Word Contents Error (BIT Word).
5. Broadcast Address. No Status response. Set Message Error and Broadcast Received bits (Status Word),
Command Word Contents Error (BIT Word).
SYNCHRONIZE WITHOUT DATA WORD ( T/R = 1; 00001)
MESSAGE SEQUENCE = SYNC + STATUS
The SSRT Mark3 responds with Status.
ERROR CONDITIONS
1. Invalid Command. No response, command ignored.
2. Command Followed by Data Word. No Status response. Set Message Error bit (Status Word), High Word Count (BIT Word).
3. T/R bit Set to Zero. No Status response. Set Message Error bit (Status Word), Command Word Contents Error (BIT Word).
4. Zero T/R bit and Broadcast Address. No Status response. Set Message Error and Broadcast Received bits (Status Word),
Command Word Contents Error (BIT Word).
TRANSMIT STATUS WORD ( T/R = 1; 00010)
MESSAGE SEQUENCE = TRANSMIT STATUS + STATUS
The Status register is not updated before it is transmitted and contains the resulting status from the previous command (assuming that it was not a
Transmit status or Transmit last command mode command).
ERROR CONDITIONS
1. Invalid Command. No response, command ignored.
2. Command Followed by Data Word. No Status response. Set Message Error bit (Status Word)
3. T/R bit Set to Zero. No Status response. Set Message Error bit (Status Word), Command Word Contents Error (BIT Word).
4. Zero T/R bit and Broadcast Address. No Status response. Set Message Error and Broadcast Received bits (Status Word),
Command Word Contents Error (BIT Word).
5. Broadcast Address. No Status response. Set Message Error and Broadcast Command Received bits (Status Word),
Command Contents Error (BIT Word).
INITIATE SELF-TEST ( T/R = 1; 00011)
MESSAGE SEQUENCE = SELF TEST + STATUS
If the command was non-broadcast, the SSRT Mark3 responds with Status. If the command was either non-broadcast or broadcast, the SSRT
Mark3 will go offline and perform its internal off-line protocol self-test. The self-test exercises the SSRT Mark3's encoder and decoders, registers,
transmitter watchdog timer, and protocol logic. This test is completed in approximately 32,000 clock cycles. That is, about 1.6 ms with a 20 MHz
clock, 2.0 ms at 16 MHz, 2.7 ms at 12 MHz, and 3.2 ms at 10 MHz.
While the SSRT Mark3 is performing its off-line self-test, it will ignore (and therefore not respond to) all messages received from the 1553 bus. The
bus controller may determine the result of the self-test by means of a Transmit BIT word mode command. If the self-test passes, bit 8 of the SSRT
Mark3's BIT word (BIT Test Fail) will be logic "0"; if the self-test fails, this bit will be logic "1". In addition, if self-test fails, the terminal flag status
word bit will be set to logic “1” in response to the next non-broadcast message.
ERROR CONDITIONS
1. Invalid Command. No response, command ignored.
2. Command Followed by Data Word. No Status response. Set Message Error bit (Status Word), High Word Count (BIT Word).
3. T/R bit Set to Zero. No status response. Set Message Error bit (Status Word), Command Word Contents Error (BIT Word).
4. Zero T/R bit and Broadcast Address. No Status response. Set Message Error and Broadcast Command Received bits (Status word),
Command Word Contents Error (BIT Word).
5. Loopback Test Failure. Set Terminal Flag bit in internal Status register (Status Word for next non-broadcast command),
Current Channel (A or B) Loop Test Failure and CH A/B Loop Test Failure (BIT Word), assert RTFAIL output.
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