HI-1575
TIMING DIAGRAMS
BIT PERIOD
BIT PERIOD
BIT PERIOD
BUSA - BUSA
(BUSB - BUSB)
t
R1
t
R1
COMMAND SYNC
t
R1
t
R1
DATA SYNC
t
R3
t
R2
ONE
ZERO
t
R3
ONE
t
R2
t
R2
BUSA - BUSA
(BUSB - BUSB)
BUSA - BUSA
(BUSB - BUSB)
FIGURE 8. MIL-STD-1553 BUS RECEIVER TIMING
MID-SYNC
MID-SYNC
MID-PARITY
MID-PARITY
MID-SYNC
MID-PARITY
1553
BUS
COMMAND
DATA
WORD WITH ERROR
t
FH
RCVA(B)
t
FH
t
FR
t
FR
t
FH
ERROR
t
FR
t
RF
STRB
(Read RXA)
(Read RXA)
(Read SAM)
t
RF
t
RF
FIGURE 9. HI-1575 RECEIVER TIMING
REG
VALID
REG
VALID
t
RWS
t
STR
STRB
t
RWH
t
RRS
t
STR
STRB
t
RRH
t
DWS
t
DWH
D15:0
SYNC
VALID
t
DRV
D15:0
SYNC
VALID
t
DRT
t
CHWS
t
CHWH
CHA/CHB
CHA/CHB
t
CHRS
t
CHRH
t
RWWS
t
RWWH
R/W
R/W
t
RWRS
t
RWRH
Figure 10. DATABUS TIMING - WRITE.
Figure 11. DATABUS TIMING - READ
HOLT INTEGRATED CIRCUITS
7
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
