Datasheet

C515C
Data Sheet 77 2003-02
External Data Memory Characteristics
Parameter Symbol Limit Values Unit
10-MHz Clock
Duty Cycle
0.4 to 0.6
Variable Clock
1/CLP= 2 MHz to 10 MHz
min. max. min. max.
RD
pulse width t
RLRH
230 – 3 CLP - 70 – ns
WR
pulse width t
WLWH
230 – 3 CLP - 70 – ns
Address hold after
ALE
t
LLAX2
48 – CLP - 15 – ns
RD
to valid data in t
RLDV
–150– 2 CLP +
TCL
Hmin
- 90
ns
Data hold after RD
t
RHDX
0–0 – ns
Data float after RD
t
RHDZ
– 80 – CLP - 20 ns
ALE to valid data in
t
LLDV
– 267 – 4 CLP - 133 ns
Address to valid data
in
t
AVDV
–285– 4 CLP +
TCL
Hmin
- 155
ns
ALE to WR
or RD t
LLWL
90 190 CLP +
TCL
Lmin
- 50
CLP +
TCL
Lmin
+ 50
ns
Address valid to WR
t
AVWL
103 – 2 CLP - 97 – ns
WR
or RD high to
ALE high
t
WHLH
15 65 TCL
Hmin
- 25 TCL
Hmin
+ 25 ns
Data valid to WR
transition
t
QVWX
5–TCL
Lmin
- 35 – ns
Data setup before
WR
t
QVWH
218 – 3 CLP +
TCL
Lmin
- 122
–ns
Data hold after WR
t
WHQX
13 – TCL
Hmin
- 27 – ns
Address float after
RD
t
RLAZ
–0– 0 ns