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TABLE 2. MIL-STD-1553B MODE CODES
T/R
BIT
MODE
CODE
FUNCTION
DATA WORD
BROADCAST
ALLOWED
1
00000
Dynamic Bus
Control
No
1
00001
Synchronize
No
Yes
1
00010
Transmit Status
Word
No
1
00011
Initiate Self Test
No
Yes
1
00100
Transmitter
Shutdown
No
Yes
1
00101
Override
Transmitter
Shutdown
No
Yes
1
00110
Inhibit Terminal
Flag
No
Yes
1
00111
Override Inhibit
Terminal Flag
No
Yes
1
01000
Reset Remote
Terminal
No
Yes
1
01001-
11111
RESERVED
No
TBD
1
10000
Transmit Vector
Word
From
Subsystem
No
0
10001
Synchronize with
Data
To Subsystem
Yes
1
10010
Transmit Last
Command
From Internal
Register
No
0
10100
Selected
Transmitter
Shutdown (See
Note)
To Subsystem
Yes
0
10101
Override Selected
Transmitter
Shutdown (See
Note)
To Subsystem
Yes
1
10011
Terrminal BIT
Word
From Internal
Register
No
0
10110-
11111
RESERVED
Yes
TBD
1
10110-
11111
RESERVED
Yes
TBD
Note: Terminal responds with Clear Status but no action is taken,
assuming a valid Command Word and any valid Data Word is received.
BROADCAST MODE CODE (SUBADDRESS 11111),
T/R = 1 (Note: Use TABLE 3E, but increase address by 2000)
3F80-3FFF
BROADCAST, TRANSMIT, SUBADDRESS 30 (UNDEFINED)
3F00-3F7F
BROADCAST, TRANSMIT, SUBADDRESS 2 (UNDEFINED)
3100-317F
BROADCAST, TRANSMIT, SUBADDRESS 1 (UNDEFINED)
3080-30FF
BROADCAST MODE CODE (SUBADDRESS 00000),
T/R = 0 (Note: Use TABLE 3D, but increase address by 2000)
3000-307F
BROADCAST MODE CODE (SUBADDRESS 11111),
T/R = 0 (Note: Use TABLE 3C, but increase address by 2000)
2F80-2FFF
BROADCAST, RECEIVE, SUBADDRESS 30 (See TABLE 3A)
2F00-2F7F
BROADCAST, RECEIVE, SUBADDRESS 2 (See TABLE 3A)
2100-217F
BROADCAST, RECEIVE, SUBADDRESS 1 (See TABLE 3A)
2080-20FF
BROADCAST MODE CODE (SUBADDRESS 00000),
T/R = 0 (Note: Use TABLE 3B, but increase address by 2000)
2000-207F
MODE CODE (SUBADDRESS 11111),
T/R = 1 (SeeTABLE 3E)
1F80-1FFF
TRANSMIT SUBADDRESS 30 (See TABLE 3A)
1F00-1F7F
RECEIVE, SUBADDRESS 2 (See TABLE 3A)
TRANSMIT, SUBADDRESS 2 (See TABLE 3A)
1100-117F
TRANSMIT, SUBADDRESS 1 (See TABLE 3A)
1080-10FF
MODE CODE (SUBADDRESS 00000),
T/R = 1 (SeeTABLE 3D)
1000-107F
MODE CODE (SUBADDRESS 11111),
T/R = 1 (SeeTABLE 3C)
0F80-0FFF
RECEIVE, SUBADDRESS 30 (See TABLE 3A)
0F00-0F7F
RECEIVE, SUBADDRESS 1 (See TABLE 3A)
0080-00FF
MODE CODE (SUBADDRESS 0000,
T/R = 0), See (TABLE 3B)
0000-007F
FUNCTION
ADDRESS
(HEX)
0100-017F
TABLE 3. OVERALL MEMORY MAP
Note: TABLES 3 and 3A-3D are byte-oriented addressing.
MODE CODES
All 13 of the dual redundant MIL-STD-1553B mode codes are
implemented by the BUS-65153. Two mode codes, Transmit
Vector Word and Synchronize (with data) involve data transfer
with the subsystem. For the Transmit BIT Word mode code, the
internally formulated BIT Word is transmitted. TABLE 2 provides
a summary of the 1553B mode codes supported by the BUS-
65153.