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D.1
Port States in Each Mode
Table D.1
Port States
Pin
Name
Mode
A
to A
—
7
0
A
to A
—
15
8
D
to D
—
15
8
P4
to P4
1, 3
7
0
2, 4
A
to A
—
19
16
P6
—
0
P6
—
1
P6
—
2
AS, RD,
—
HWR, LWR
P6
—
7
612
Appendix D Pin States
Hardware
Standby
Software
Reset
Mode
Standby Mode
L
T
(SSOE = 0)
T
(SSOE = 1)
Keep
L
T
(SSOE = 0)
T
(SSOE = 1)
Keep
T
T
T
T
T
Keep
T
T
T
(SSOE = 0)
L
T
T
(SSOE = 1)
Keep
T
T
Keep
T
T
(BRLE = 0)
Keep
(BRLE = 1)
T
T
T
(BRLE = 0)
Keep
(BRLE = 1)
H
H
T
(SSOE = 0)
T
(SSOE = 1)
H
Clock
T
(PSTOP = 0)
output
H
(PSTOP = 1)
Keep
Bus-
Program
Released Mode
Execution Mode
T
A
T
A
T
D
Keep
I/O port
T
D
T
A
Keep
I/O port
WAIT
T
I/O port
BREQ
L
(BRLE = 0)
I/O port
(BRLE = 1)
BACK
AS, RD, HWR,
T
LWR
(PSTOP = 0)
(PSTOP = 0)
φ
φ
(PSTOP = 1)
(PSTOP = 1)
Keep
Input port
to A
7
0
to A
15
8
to D
15
8
to D
7
0
to A
19
16
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