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Pin Name
I/O
PTO0
Output
PTO1
PTO2
INT0
Input
KR4 to KR7
Input
PTH00
Input
PTH01
KRREN
Input
AV
Input
REF
CL1
Input
CL2
Output
X1
Input
X2
–
RESET
Input
IC
–
V
–
DD
V
–
SS
Note Circled characters indicate Schmitt triggered input.
CHAPTER 2 PIN FUNCTIONS
Table 2-2. Functions of Non-Port Pins
Alternate
Function
P30
Timer counter output pins.
P31
P32
P61
Edge-detected vectored interrupt input
(edge to be detected is selectable).
Noise eliminator is selectable.
P70 to P73
Falling edge-detected testable input.
P62
Variable threshold voltage 2-bit analog input.
P63
–
Key return reset enable pin.
Reset signal is generated at falling edge of KRn
when KRREN = high in STOP mode.
P60
Reference voltage input pin.
Provided in µ PD754144 only.
–
These pins connect R and C for system clock
oscillation. No external clock can be input to
these pins.
Provided in µ PD754244 only.
–
These pins connect crystal/ceramic oscillator for
system clock oscillation. When external clock is
used, input it to X1 and inverse phase to X2.
–
System reset input pin (active-low)
–
Internally connected. Connect directly to V
–
Positive power supply pin.
–
Ground potential.
User's Manual U10676EJ3V0UM
Function
Noise
eliminator/
asynchronous
selectable
.
DD
I/O Circuit
After Reset
Type
Note
Input
E-B
Input
F -A
Input
B -A
Input
F -A
Input
B
Input
F -A
–
–
–
–
–
B -A
–
–
–
–
–
–
25
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