
CHAPTER 2 PIN FUNCTION
12
(1) Port pins (2/3)
Input/
Output
After
Reset
Alternate
Function
Pin
Pin Name
Function
P30
Input/
output
Input
TO0
P31
TO1
P32
TO2
P33
TI1
P34
TI2
P35
PCL
P36
BUZ
P37
—
P70 to P74
Input/
output
Port 7.
N-ch open drain 5-bit I/O port.
Input/output specifiable bit-wise.
LED can be driven directly.
Mask ROM version can specify pull-up resistors bit-wise with the
mask option.
Input
—
P80, P81
Output
Port 8.
P-ch open drain 2-bit high breakdown voltage output port.
LED can be driven directly.
Mask ROM version can specify pull-down resistors bit-wise with the
mask option (connection to V
LOAD
or V
SS
specifiable in 2-bit units).
The
μ
PD78P048A has on-chip pull-down resistors (connected to
V
LOAD
).
Output
FIP0, FIP1
P90 to P97
Output
Port 9.
P-ch open drain 8-bit high breakdown voltage output port.
LED can be driven directly.
Mask ROM version can specify pull-down resistors bit-wise with the
mask option (connection to V
LOAD
or V
SS
specifiable in 4-bit units).
The
μ
PD78P048A has on-chip pull-down resistors (connected to
V
LOAD
).
Output
FIP2 to FIP9
P100 to P107
Output
Port 10.
P-ch open drain 8-bit high breakdown voltage output port.
LED can be driven directly by P100 to P105.
Mask ROM version can specify pull-down resistors bit-wise with the
mask option (connection to V
LOAD
or V
SS
specifiable in 4-bit units).
The
μ
PD78P048A has on-chip pull-down resistors for P100 to P105
(connected to V
LOAD
).
Output
FIP10 to FIP7
Port 3.
8-bit input/output port.
LED can be driven directly.
Input/output specifiable bit-wise.
If used as an input port, an on-chip pull-up resistor can be connected
by software.
Mask ROM version can specify pull-down resistors bit-wise with the
mask option.