Datasheet

C505/C505C/C505A/C505CA
Data Sheet 69 12.00
AC Characteristics (16 MHz, 0.4 to 0.6 Duty Cycle, cont’d)
External Data Memory Characteristics
Parameter Symbol Limit Values Unit
16-MHz clock
Duty Cycle
0.4 to 0.6
Variable Clock
1/CLP= 2 MHz to 16 MHz
min. max. min. max.
RD
pulse width
t
RLRH
158 – 3 CLP - 30 – ns
WR
pulse width
t
WLWH
158 – 3 CLP - 30 – ns
Address hold after ALE
t
LLAX2
48 – CLP - 15 – ns
RD
to valid data in
t
RLDV
– 100 – 2 CLP+
TCL
Hmin
- 50
ns
Data hold after RD
t
RHDX
0 – 0 – ns
Data float after RD
t
RHDZ
– 51 – CLP - 12 ns
ALE to valid data in
t
LLDV
– 200 – 4 CLP - 50 ns
Address to valid data in
t
AVDV
– 200 – 4 CLP +
TCL
Hmin
-75
ns
ALE to WR
or RD
t
LLWL
73 103 CLP +
TCL
Lmin
- 15
CLP+
TCL
Lmin
+ 15
ns
Address valid to WR
t
AVWL
95 – 2 CLP - 30 – ns
WR
or RD high to ALE high
t
WHLH
10 40 TCL
Hmin
- 15 TCL
Hmin
+ 15 ns
Data valid to WR
transition
t
QVWX
5 – TCL
Lmin
- 20 – ns
Data setup before WR
t
QVWH
163 – 3 CLP +
TCL
Lmin
- 50
– ns
Data hold after WR
t
WHQX
5 – TCL
Hmin
- 20 – ns
Address float after RD
t
RLAZ
– 0 – 0ns