Core1553BBC-SKT MICROSEMI, Core1553BBC-SKT Datasheet - Page 6

• Manufacturer Part Number: Core1553BBC-SKT
• Description: Programmable Logic Development Tools Bus Controller
• Manufacturer: MICROSEMI

Word Formats
There are only three types of words in a 1553B message: a command word (CW), a data word (DW), and a status word
(SW). Each 20-bit word consists of a 3-bit sync pattern, 16 bits of data, and a parity bit
Figure 5 • 1553B Word Formats
I/O Signal Descriptions
Table 2 • 1553B Bus Interface
6
Name
BUSAINEN
BUSAINP
BUSAINN
BUSBINEN
BUSBINP
BUSBINN
BUSAOUTIN
BUSAOUTP
BUSAOUTN
BUSBOUTIN
BUSBOUTP
BUSBOUTN
CW
DW
SW
Bit
Core1553BBC MIL-STD-1553B Bus Controller
1
Sync
Sync
Sync
2
3
Type
Out
Out
Out
Out
Out
Out
Out
Out
4
In
In
In
In
5
RT Address
RT Address
Description
Active high output that enables for the A receiver
Positive data input from the A receiver
Negative data input from the A receiver
Active high output that enables for the B receiver
Positive data input from the bus to the B receiver
Negative data input from the bus to the B receiver
Active high transmitter inhibit for the A transmitter
Positive data output to the bus A transmitter (is held high when no transmission)
Negative data output to the bus A transmitter (is held high when no transmission)
Active high transmitter inhibits the B transmitter
Positive data output to the bus B transmitter (is held high when no transmission)
Negative data output to the bus B transmitter (is held high when no transmission)
6
5
5
7
8
T/R
9
1
1
v4.0
10
1
11
1
Sub-address
Data
16
12
5
Reserved
13
3
14
15
(Figure
1
Word Count/Mode Code
16
1
5).
17
5
1
18
1
19
1
20
1
P
1
P
1