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15.14 Memory expansion mode and microprocessor mode : When 2- φ access in high-speed running (Internal RAM access)
Memory expansion mode and Microprocessor mode
: When 2- access in high-speed running (Internal RAM access)
<Write>
X
IN
1
E
Address output
A
–A
0
7
Address output
A
–A
8
15
(BYTE = "H")
Address/Data output
A
/D
–A
/D
8
8
15
15
(BYTE = "L")
Data input
D
–D
8
15
(BYTE = "L")
Address/Data output
A
/D
–A
/D
16
0
23
7
Data input
D
–D
0
7
ALE output
BHE output
R/W output
Test conditions (
, E, P0–P3)
1
•V
= 5 V±10%
CC
•Output timing voltage : V
•Data input
ELECTRICAL CHARACTERISTICS
t
t
t
t
t
w(L)
w(H)
r
f
c
t
w(
L)
t
w(
H)
t
d(E–
)
1
t
d(P0A–E)
t
d(P1A–E)
t
d(P1A–E)
t
d(P1A–ALE)
t
d(P2A–E)
Address
t
d(P2A–ALE)
t
w(ALE)
t
d(E–ALE)
t
d(BHE–E)
t
d(R/W–E)
The undefined value is output.
= 0.8 V, V
= 2.0 V
OL
OH
: V
= 0.8 V, V
= 2.5 V
IL
IH
7751 Group User's Manual
t
d(E–
)
1
t
w(EL)
t
h(E–P0A)
t
h(E–P1A)
Data
t
h(ALE–P1A)
Data
t
h(ALE–P2A)
t
d(ALE–E)
t
h(E–BHE)
t
h(E–R/W)
15–49
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