HI-1575
Write TX,
(MIL-STD-1553 Status word)
Write TX,
(MIL-STD-1553 Data word)
Read SAM,
check SENDDATA=1
D15 - D0
TXDATA
DON’T CARE
SAM
TXDATA
R/W
DON’T CARE
CHA/CHB
VALID
DON’T CARE
VALID
SYNC
DON’T CARE
REG
DON’T CARE
STRB
BUSA (B)
SYNC
SYNC
15
14
13
3
3
2
1
0
P
SYNC
SYNC
15
FIGURE 3. EXAMPLE TRANSMIT OPERATION
Read RXA or RXB,
(MIL-STD-1553 Data word)
Read SAM
BUSA (B)
SYNC
SYNC
15
14
13
12
2
1
0
P
SYNC
SYNC
15
14
13
12
RCVA (B)
R/W
DON’T CARE
CHA/CHB
DON’T CARE
VALID
REG
DON’T CARE
STRB
D15 - D0
SAM
RXA (B)
SYNC
SYNC
FIGURE 4. EXAMPLE RECEIVE OPERATION
CHAN OR CHA/CHB
0
1
X
REG
0
0
1
Register
Receiver A Data (RXA)
Receiver B Data (RXB)
Status & Mode Register (SAM)
FIGURE 5. HI-1575 REGISTER MAP
HOLT INTEGRATED CIRCUITS
5