
MITSUBISHI
ELECTRIC
10
MITSUBISHI MICROCOMPUTERS
4250 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
PORT BLOCK DIAGRAMS (CONTINUED)
2:
(Note 1)
(Note 1)
OGA instruction
D
T
Q
IAG instruction
Register A
A
0
PU0
0
G
0
/INT
Pull-up transistor
EXF0
Key-on wakeup
input
K0
2
0
1
Falling
Rising
External interrupt
OGA instruction
D
T
Q
IAG instruction
Register A
A
1
Key-on wakeup
input
PU0
0
G
1
/T
OUT
Timer 1 underflow
signal output
1
0
V1
3
K0
1
1/2
This symbol represents
a parasitic diode.
Applied potential to ports G
0
–G
3
must be V
DD
or less.
k represents 2 or 3.
Notes 1:
OGA instruction
D
T
Q
IAG instruction
Register A
Ak
Key-on wakeup
input
PU0
0
G
2
, G
3
K0
1
(Note 1)
(Note 2)
Pull-up transistor
Pull-up transistor
One-sided edge
detection circuit