UPSD3212C, UPSD3212CV
Table 95. External Data Memory AC Characteristics (with the 5V MCU Module)
Variable Oscillator
40MHz Oscillator
1/t
= 24 to 40MHz
(1)
CLCL
Symbol
Unit
Parameter
Min
120
120
10
Max
Min
Max
t
6t
6t
t
– 30
RD pulse width
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
RLRH
WLWH
LLAX2
RHDX
RHDX
RHDZ
LLDV
CLCL
CLCL
t
t
t
t
t
t
t
t
t
t
t
t
t
t
– 30
– 15
WR pulse width
Address hold after ALE
RD to valid data in
Data hold after RD
Data float after RD
ALE to valid data in
CLCL
5t
– 50
75
CLCL
0
0
2t
8t
9t
t
– 12
– 50
– 75
+ 15
38
150
150
90
CLCL
CLCL
CLCL
Address to valid data in
ALE to WR or RD
AVDV
LLWL
3t
– 15
– 30
– 15
– 20
– 50
– 20
60
70
10
5
CLCL
CLCL
4t
t
Address valid to WR or RD
WR or RD High to ALE High
Data valid to WR transition
Data set up before WR
Data hold after WR
AVWL
WHLH
QVWX
QVWH
WHQX
RLAZ
CLCL
t
+ 15
40
CLCL
CLCL
CLCL
t
7t
t
125
5
CLCL
CLCL
Address float after RD
0
0
Note: 1. Conditions (in addition to those in Table 86, V = 4.5 to 5.5V): V = 0V; C for Port 0, ALE and PSEN output is 100pF; C for
CC
SS
L
L
other outputs is 80pF
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STMICROELECTRONICS [ ST ]
