CT2566 Datasheet, PDF (30/37 Pages) Aeroflex Circuit Technology – CT2566 MIL-STD-1553 to Microprocessor Interface Unit

SOM (7)
NBGRNT (19)
MEMCS (16)
MEMWR (57)
MEMOE (56)
TAGEN (5)
BCSTART (46)
A15-A00
D15-D00
tpw13
td13
tpw12
td14
td15
1553 COMMAND
WORD
tpw8
STACK POINTER
STACK ADDRESS
STACK ADDRESS
BLOCK STATUS WORD
STACK ADDRESS + 1
TIME TAG
STACK ADDRESS + 2
TRI-STATE
STACK ADDRESS + 3
COMMAND
LOOK-UP ADDRESS
BLOCK ADDRESS
SYMBOL
td13
td14
td15
tpw8
tpw12
tpw13
RTU SOM Timing (No Contention)
DESCRIPTION
MIN
RTU SOM Cycle DMA delay
-
1553 Command Word set-up time
60
1553 Command Word hold time
60
BCSTART low pulse width
70
SOM low pulse width
50
NBGRNT low pulse width
50
MAX
200
-
-
-
200
200
UNITS
ns
ns
ns
ns
ns
ns
Figure 34 – RTU SOM (no contention)