Maxim Integrated DS80C390 - Manual (Page 35)

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
MCS
-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
MCS
-5 ns C
ST
= 0
0.25t
MCS
-5 1
≤
C
ST
≤
3
Port 0 MOVX Address,
4 CE0
−
, 4 PCE0
−
Valid to
ALE Low 1.25 t
MCS
-10 4
≤
C
ST
≤
7
t
LLAX2
0.125 t
MCS
-5 ns 0
≤
C
ST
≤
3 Address Hold after MOVX
Read/Write
1.125 t
MCS
-5 ns 4
≤
C
ST
≤
7
RD Pulse Width
t
RLRH
0.5 t
MCS
-5 ns C
ST
=0
C
ST
•
t
MCS
-10 1
≤
C
ST
≤
7
WR Pulse Width
t
WLWH
0.5 t
MCS
-5 ns C
ST
=0
C
ST
•
t
MCS
-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
ST
+0.25)
•
t
MCS
-40 1
≤
C
ST
≤
3
(C
ST
+1.25)
•
t
MCS
-40 4
≤
C
ST
≤
7