Core1553BRT-EBR Enhanced Bit Rate 1553 Remote Terminal
Loopback Tests
The Core1553BRT-EBR performs loopback testing on all of its transmissions. The transmit data is fed back into the
receiver and each transmitted word is compared. If an error is detected, the loopback fail bit is set in the TSW and also
in the BIT word.
Table 10 • Supported Mode Codes
T/R
Bit
Mode
Code
Data
Core
Broadcast
Function and Effect
Word Supports Allowed
1
00000
0
Dynamic Bus Control
The core does not support bus controller functions, so it will set the message
error and the dynamic bus control bit in the status word.
No
No
No
No
1
00001
1
Synchronize
Yes
Yes
The core will assert its SYNCNOW output after the command word has been
received.
1
1
00010
2
Transmit Status Word
The core retransmits the last status word.
No
No
Yes
Yes
No
00011
3
Initiate Self Test
Yes
The core does not support self test. Since the core supports the transmit BIT
word mode code, this command is treated as legal and will not set a message
error.
1
1
1
00100
4
Reserved
No
No
No
No
No
Yes
No
No
Yes
00101
5
Reserved
00110
6
Inhibit Terminal Flag
The core will mask the TFLAG input and the terminal flag bit in the status word
will be forced to zero.
1
1
00111
7
Override Inhibit Terminal Flag
The core will re-enable the TFLAG input.
No
No
Yes
Yes
Yes
Yes
01000
8
Reset Remote Terminal
The core will assert its BUSRESET output after the command word has been
received. It will also reset itself.
1
1
1
0
10000
16
Transmit Vector Word
The core will transmit a single data word that contains the value on the VWORD
input.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
Yes
10010
18
Transmit Last Command Word
The core will transmit a single data word that contains the last command word
received.
10011
19
Transmit Bit Word
The core will transmit a single data word that contains the extended core status
information. The value of this word is defined in Table 13 on page 18.
10001
17
Synchronize with Data
The core will assert its SYNCNOW output after the data word has been
received.
0
0
10100
20
Reserved
Yes
Yes
No
No
No
No
10101
21
Reserved
Advanced v1.1
15
ACTEL [ Actel Corporation ]
