MA28140 Datasheet, PDF (59/72 Pages) Dynex Semiconductor – Packet Telecommand Decoder

MA28140
T imin g
De scription
Min
Typ
Max
Tp1
MAPDSR rising to PCSN falling
0 ns
Tp2 (1)
PCSN falling to PRDY rising
- for MAP word (1)
2 Tck
17 Tck
- for CLCW word
5 Tck
- for CPDU status word
7 Tck
- for AU and FAR status word (1)
13 Tck
Tp3
PCSN high width
Tck
Tp4
PCSN rising to PRDY falling
39 ns
Tp5
PBUS hold after PCSN rising
0 ns
Tp6
PBUS valid before PRDY
Tck
Tp7
PCSN rising to MAPDSR falling
3 Tck
4 Tck
Tp8
MAPDSR low pulse width
40 Tck
Tp9 (2)
MAPADT high pulse width
2 Tck
Tp10
PAD setup to PCSN falling
Tck
Tp11
PAD hold after PCSN rising
Tck
Tp12 (2)
MAPADT rising to MAPDSR falling
Tck
Tp13
PCSN rising to PBUS tristate
31 ns
Tp14
PCSN falling to PBUS asserted
0 ns
55 ns
Note (1): These timings are guaranteed when there is no request for the local bus through the BRQN input.
In addition when using slow memories, the local memory accesses may be delayed by using the LACK
input, two extra delays shall be added to Tp2.
Note (2): These timings are exact with a variance of -10ns to +10ns.
Table 19: Parallel MAP Interface Timings
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