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2.1 Pin Functions of µ PD754244
Pin Name
I/O
P30
I/O
P31
P32
P33
P60
I/O
P61
P62
P63
P70
Input
P71
P72
P73
P80
I/O
Notes 1.
Circled characters indicate Schmitt-triggered input.
2.
Do not specify connection of an on-chip pull-up resistor when using a programmable threshold port.
24
CHAPTER 2 PIN FUNCTIONS
Table 2-1. Pin Functions of Digital I/O Ports
Alternate
Function
Programmable 4-bit I/O port (Port 3).
PTO0
Input/output can be specified in 1-bit units.
PTO1
On-chip pull-up resistor can be specified by
software in 4-bit units.
PTO2
–
Programmable 4-bit I/O port (Port 6).
AV
REF
Input/output can be specified in 1-bit units.
INT0
An on-chip pull-up resistor can be specified
by software in 4-bit units
PTH00
A noise eliminator is selectable for P61/
PTH01
INT0.
4-bit input port (Port 7).
KR4
A pull-up resistor can be incorporated (mask
KR5
option).
KR6
KR7
1-bit I/O port (PORT8).
–
An on-chip pull-up resistor can be specified
by software.
User's Manual U10676EJ3V0UM
8-Bit
Function
Note 2
.
I/O Circuit
After Reset
Note 1
I/O
Type
×
Input
E-B
×
Input
F -A
×
Input
B -A
×
Input
F -A
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