Oki MSM66P201 - Manual (Page 20)

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¡ Semiconductor MSM66201/66P201/66207/66P207
AC Characteristics
• External program memory control
• External data memory control
Parameter Symbol Condition Min. Max. Unit
Clock (OSC) Pulse
ALE Pulse Width
RD Pulse Width
WR Pulse Width
RD Pulse Delay Time
WR Pulse Delay Time
Low Address Setup Time
Low Address Hold Time
High Address Setup Time
Data Hold Time
t
fW
t
AW
t
RW
t
WW
t
RAD
t
WAD
t
AAS
t
AAH
t
AAD
t
DH
—
C
L = 50pF
50
3t
fW –20
4t
fW –20
4t
fW –20
t
fW –20
t
fW –20
2t
fW –35
t
fW –20
t
fW –20
t
fW –20
—
—
—
—
t
fW +20
t
fW +20
2t
fW +20
t
fW +40
t
fW +40
t
fW +40
ns
(V
DD
=5V±10%, Ta=–40 to +85°C)
Data Delay Time t
DD
t
fW –20 t
fW +40
Memory Data Hold Time t
MH
0 t
fW –20
Memory Data Setup Time t
MS
100 —
High Address Hold Time t
AWH
t
fW –20 t
fW +40
High Address Hold Time t
ARH
t
fW –20 t
fW +40
Parameter Symbol Condition Min. Max. Unit
Clock (OSC) Pulse
ALE Pulse Width
PSEN Pulse Width
PSEN Pulse Delay Time
Low Address Setup time
Low Address Hold Time
High Address Delay Time
High Address Hold Time
Instruction Setup Time
Instruction Hold Time
t
fW
t
AW
t
PW
t
PAD
t
AAS
t
AAH
t
AAD
t
APH
t
IS
t
IH
—
C
L = 50pF
50
3t
fW –20
4t
fW –20
t
fW –20
2t
fW –35
t
fW –20
t
fW –20
t
fW –20
100
0
—
—
—
t
fW +20
2t
fW +20
t
fW +40
t
fW +40
t
fW +40
—
t
fW –20
ns
(V
DD
=5V±10%, Ta=–40 to +85°C)