User's Manual

MSM80C154S/83C154S/85C154HVS
24
2.6.3 MSM80C154S fundamental operation time charts
S1 S2 S3 S4 S5 S6
M1
S1 S2 S3 S4 S5 S6
M1 or M2
S1
PCL
OUT
INST IN
PCH OUT PCH OUT PCH OUT PCH OUT
XTAL1
1
0
ALE
1
0
PSEN
1
0
PORT–0
1
0
PORT–2
1
0
PCH OUT
PCL
OUT
INST IN
PCL
OUT
INST IN
PCL
OUT
INST IN INST IN
S1 S2 S3 S4 S5 S6
M1
S1 S2 S3 S4 S5 S6
M2
S1
PCL
OUT
INST IN
PCH OUT PCH OUT PORT 2 LATCH DATA OUT
XTAL1
1
0
ALE
1
0
PSEN
1
0
PORT–0
1
0
PORT–2
1
0
PCH OUT
Rr
OUT
RAM DATA IN
EXT RAM
DATA
PCL
OUT
INST IN
RD
1
0
Figure 2-11 MSM80C154S MOVX A, @Rr execution
Figure 2-10 MSM80C154S external program memory read cycle timing chart
(1) External program memory read cycle timing chart
(2) MOVX A, @Rr