
DS80C390
35 of 58 110199
MULTIPLEXED EXTERNAL PROGRAM MEMORY READ CYCLE
MOVX CHARACTERISTICS (Multiplexed address/data bus)
PARAMETER SYMBOL MIN MAX UNITS STRETCH
VALUES
C
ST
(MD2:0)
t
LHLL2
0.375 t
-5 ns C
ST
= 0
0.5 t
MCS
-5
1≤ C
ST
≤ 3
MOVX ALE Pulse Width
1.5 t
MCS
-10 ns
4 ≤ C
ST
≤ 7
t
AVLL2
0.125 t
-5 ns C
ST
= 0
0.25t
MCS
-5
1≤ C
ST
≤ 3
Port 0 MOVX Address,
4CE0 − , 4PCE0− Valid to
ALE Low 1.25 t
-10
4 ≤ C
ST
≤ 7
t
LLAX2
0.125 t
-5 ns
0≤ C
ST
≤3
Address Hold after MOVX
Read/Write
1.125 t
-5 ns
4 ≤ C
ST
≤ 7
RD Pulse Width
t
RLRH
0.5 t
MCS
-5 ns C
ST
=0
C
•t
-10 1 ≤ C
ST
≤ 7
WR Pulse Width
t
WLWH
0.5 t
MCS
-5 ns C
ST
=0
C
•t
-10 1 ≤ C
ST
≤ 7
RD Low to Valid Data In
t
RLDV
0.5 t
MCS
-20 ns C
ST
=0
C
ST
•t
MCS
-20 1 ≤ C
ST
≤ 7
Data Hold after Read t
RHDX
0 ns
Data Float after Read t
RHDZ
0.25 t
MCS
-5 ns C
ST
= 0
0.5t
MCS
-5
1≤ C
ST
≤ 3
1.5 t
MCS
-5
4 ≤ C
ST
≤ 7
ALE Low to Valid Data In t
LLDV
0.625 t
MCS
-20 ns C
ST
= 0
(C
+0.25)•t
-40 1≤ C
ST
≤ 3
(C
+1.25)
t
-40 4 ≤ C
ST
≤ 7
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