UT1553BRTSGC 查看數據表（PDF） - Aeroflex UTMC

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UT1553BRTSGC

UTI760A RTS Remote Terminal for Stores

Aeroflex UTMC 

1.4 Mode Code and Subaddress

The UT1760A RTS provides two modes of illegal

subaddress decoding, one meeting MIL-STD-1760A

Notices I and II, and the other meeting MIL-STD-1760A

Notice III. In addition, the device has automatic internal

illegal command decoding for reserved MIL-STD-1553B

mode codes. These definitions are extracted from MIL-

STD-1760A and reviewed in section 1.5 of this document.

Upon command word validation and decode, status pins

MCSA(4:0) and MC/SA become valid. Status pin MC/SA

will indicate whether the data on pins MCSA(4:0) is mode

code or subaddress information. Status Register bits 0

through 5 contain the same information as pins MCSA(4:0)

and MC/SA. The system designer can use signals

MCSA(4:0), MC/SA, BRDCST, RTRT, etc. to illegalize

mode codes, subaddresses, and other message formats

(broadcast and RT-to-RT) via the Illegal Command

(ILLCOM) input to the part.

RTS MODE CODE HANDLING PROCEDURE

T/R

Mode Code

Function

0

10100

Selected Transmitter Shutdown 2

0

10101

0

10001

1

00000

1

00001

1

00010

1

00011

1

00100

1

00101

1

00110

1

00111

1

01000

1

10010

1

10000

1

10011

OShvuetrdriodwenS2elected Transmitter

Synchronize (w/Data)

Dynamic Bus Control 2

Synchronize 1

Transmit Status Word 3

Initiate Self-Test 1

Transmitter Shutdown

Override Transmitter Shutdown

Inhibit Terminal Flag Bit

Override Inhibit Terminal Flag

Reset Remote Terminal 1

Transmit Last Command

Word 3

Transmit Vector Word

Transmit BIT Word

Operation

1. Command word stored

2. MERR pin asserted

3. MERR bit set in Status Register

4. Status word transmitted

1. Command word stored

2. MERR pin asserted

3. MERR bit set in Status Register

4. Status word transmitted

1. Command word stored

2. Data word stored

3. Status word transmitted

1. Command word stored

2. MERR pin asserted

3. MERR bit set in Status Register

4. Status word transmitted

1. Command word stored

2. Status word transmitted

1. Command word stored

2. Status word transmitted

1. Command word stored

2. Status word transmitted

1. Command word stored

2. Alternate bus shutdown

3. Status word transmitted

1. Command word stored

2. Alternate bus enabled

3. Status word transmitted

1. Command word stored

2. Terminal Flag bit set to zero and disabled

3. Status word transmitted

1. Command word stored

2. Terminal Flag bit enabled, but not set to logic one

3. Status word transmitted

1. Command word stored

2. Status word transmitted

1. Status word transmitted

2. Last command word transmitted

1. Command word stored

2. Status word transmitted

3. Data word transmitted

1. Command word stored

2. Status word transmitted

3. Data word transmitted

Notes:

1. Further host interaction required for mode code operation.

2. Reserved mode code; A) MERR pin asserted, B) MESS ERR bit set, C) status word transmitted (ME bit set to logic one).

3. Status word not affected.

4. Undefined mode codes are treated as reserved mode codes.

RTS-8

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