MT88V32
MC6800/
6802/6809
Φ2
VMA
A5 + A0 + VMA
11
Preliminary Information
MT88V32
STB1
STB2
A
5
-A
15
A0
MR
A5 + A0 + VMA
A5 +VMA
CS
AY0-AY1
AX0-AX2
DATA
R/W
A
0
-A
4
D0
R/W
5
Notes: for the MC6802
Φ2
will be E.
for the MC6809
Φ2
will be E and VMA will be the OR’ed product of Q and E.
Figure 4 - Motorola Non-multiplexed Processor Interface
MC6801/
6803/68HC11
(PC) AD
0
-AD
4
AD0
5
MT88V32
74HCT574
DATA
AY0
AY1
AY2
AX0
AX1
CS
STB2
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D
8
Q
1
Q
2
Q
3
Q
4
Q
5
Q
6
Q
7
Q
8
AD0
3
(PC) AD
5
-AD
7
A5
A5 + A0
(PB) A
8
-A
15
AS
E
8
CLK OC
A5 + A0
MR
STB1
R/W
R/W
Figure 5 - Motorola Multiplexed Processor Interface
3-56