Datasheet

C515C
Data Sheet 76 2003-02
AC Characteristics (Operating Conditions apply)
(
C
L
for port 0, ALE and PSEN outputs = 100 pF; C
L
for all other outputs = 80 pF)
Program 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.
ALE pulse width
t
LHLL
60 – CLP - 40 – ns
Address setup to ALE
t
AVLL
15 – TCL
Hmin
- 25 – ns
Address hold after ALE
t
LLAX
15 – TCL
Hmin
- 25 – ns
ALE to valid instruction
in
t
LLIV
– 113 – 2 CLP - 87 ns
ALE to PSEN
t
LLPL
20 – TCL
Lmin
- 20 – ns
PSEN
pulse width t
PLPH
115 – CLP +
TCL
Hmin
- 30
–ns
PSEN
to valid
instruction in
t
PLIV
–75– CLP +
TCL
Hmin
- 65
ns
Input instruction hold
after PSEN
t
PXIX
0–0 – ns
Input instruction float
after PSEN
t
PXIZ
1)
1)
Interfacing the C515C to devices with float times up to 35 ns is permissible. This limited bus contention will not
cause any damage to port 0 drivers.
–30– TCL
Lmin
- 10 ns
Address valid after
PSEN
t
PXAV
1)
35 – TCL
Lmin
- 5 – ns
Address to valid
instruction in
t
AVIV
– 180 – 2 CLP +
TCL
Hmin
- 60
ns
Address float to PSEN
t
AZPL
00–ns