RTR-5
1.3 Internal Registers
The RTR uses two internal registers to allow the host to
control the RTR operation and monitor its status. The host
uses the Control (CTRL) signal along with Chip Select (CS),
Read/Write (RD/WR), and Output Enable (OE) to read the
16-bit Status Register or write to the 11-bit Control Register.
No address data is needed to select a register.
The Control Register toggles bits in the MIL-STD-1553B
status word, enables the biphase inputs, recognizes
broadcast commands, determines RAM Busy (RBUSY)
timing, selects terminal active flag, and puts the part in self-
test mode. The Status Register supplies operational status
of the UT1553B RTR to the host. These registers must be
initialized before attempting RTR operation. Internal
registers can be accessed while RBUSY is active.
Subaddress/Mode Code
RAM Location
Subaddress/Mode Code
RAM Location
Transmit Vector Word Mode Code
3C0 (hex)
Transmit Last Command Mode Code
3E0 (hex)
Receive Subaddress
01
3C1 (hex)
Transmit Subaddress
01
3E1 (hex)
Receive Subaddress
02
3C2 (hex)
Transmit Subaddress
02
3E2 (hex)
Receive Subaddress
03
3C3 (hex)
Transmit Subaddress
03
3E3 (hex)
Receive Subaddress
04
3C4 (hex)
Transmit Subaddress
04
3E4 (hex)
Receive Subaddress
05
3C5 (hex)
Transmit Subaddress
05
3E5 (hex)
Receive Subaddress
06
3C6 (hex)
Transmit Subaddress
06
3E6 (hex)
Receive Subaddress
07
3C7 (hex)
Transmit Subaddress
07
3E7 (hex)
Receive Subaddress
08
3C8 (hex)
Transmit Subaddress
08
3E8 (hex)
Receive Subaddress
09
3C9 (hex)
Transmit Subaddress
09
3E9 (hex)
Receive Subaddress
10
3CA (hex)
Transmit Subaddress
10
3EA (hex)
Receive Subaddress
11
3CB (hex)
Transmit Subaddress
11
3EB (hex)
Receive Subaddress
12
3CC (hex)
Transmit Subaddress
12
3EC (hex)
Receive Subaddress
13
3CD (hex)
Transmit Subaddress
13
3ED (hex)
Receive Subaddress
14
3CE (hex)
Transmit Subaddress
14
3EE (hex)
Receive Subaddress
15
3CF (hex)
Transmit Subaddress
15
3EF (hex)
Receive Subaddress
16
3D0 (hex)
Transmit Subaddress
16
3F0 (hex)
Receive Subaddress
17
3D1 (hex)
Transmit Subaddress
17
3F1 (hex)
Receive Subaddress
18
3D2 (hex)
Transmit Subaddress
18
3F2 (hex)
Receive Subaddress
19
3D3 (hex)
Transmit Subaddress
19
3F3 (hex)
Receive Subaddress
20
3D4 (hex)
Transmit Subaddress
20
3F4 (hex)
Receive Subaddress
21
3D5 (hex)
Transmit Subaddress
21
3F5 (hex)
Receive Subaddress
22
3D6 (hex)
Transmit Subaddress
22
3F6 (hex)
Receive Subaddress
23
3D7 (hex)
Transmit Subaddress
23
3F7 (hex)
Receive Subaddress
24
3D8 (hex)
Transmit Subaddress
24
3F8 (hex)
Receive Subaddress
25
3D9 (hex)
Transmit Subaddress
25
3F9 (hex)
Receive Subaddress
26
3DA (hex)
Transmit Subaddress
26
3FA (hex)
Receive Subaddress
27
3DB (hex)
Transmit Subaddress
27
3FB (hex)
Receive Subaddress
28
3DC (hex)
Transmit Subaddress
28
3FC (hex)
Receive Subaddress
29
3DD (hex)
Transmit Subaddress
29
3FD (hex)
Receive Subaddress
30
3DE (hex)
Transmit Subaddress
30
3FE (hex)
Synchronize w/Data Word Mode Code
3DF (hex)
Transmit Bit Word Mode Code
3FF (hex)
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