HI-1575
TIMING DIAGRAMS
BIT PERIOD
BIT PERIOD
BIT PERIOD
t
t
R1
BUSA - BUSA
(BUSB - BUSB)
t
t
R1
R1
COMMAND SYNC
DATA SYNC
ZERO
BUSA - BUSA
(BUSB - BUSB)
R1
t
t
R2
R3
BUSA - BUSA
(BUSB - BUSB)
t
t
t
R2
R2
R3
ONE
ONE
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
tFH
tFH
tFH
RCVA(B)
tFR
tFR
ERROR
STRB
tFR
tRF
tRF
tRF
(Read RXA)
(Read RXA)
(Read SAM)
FIGURE 9. HI-1575 RECEIVER TIMING
REG
REG
VALID
VALID
tRWH
tRRH
tRWS
tRRS
tSTR
tSTR
STRB
STRB
tDWS
tDRV
tDRT
tCHRH
tRWRH
tDWH
D15:0
SYNC
VALID
VALID
D15:0
SYNC
tCHRS
tCHWS
tCHWH
CHA/CHB
CHA/CHB
tRWRS
tRWWS
tRWWH
R/W
R/W
Figure 10. DATABUS TIMING - WRITE.
Figure 11. DATABUS TIMING - READ
HOLT INTEGRATED CIRCUITS
7
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
