CHAPTER 2 PIN FUNCTIONS
User's Manual U11919EJ3V0UM00
34
(2)
Non-port pins
Pin Name
Input/Output
Function
After Reset
Alternate Function
INTP0
P30
INTP1
P31
INTP2
Input
External interrupt request input for which the active edge (rising
edge, falling edge, or both) can be specified
Input
P32/CPT2
KR0 to KR7
Input
Key return signal detection
Input
P40 to P47
SI0
Input
3-wire serial interface serial data input
Input
P22/RxD
SO0
Output
3-wire serial interface serial data output
Input
P21/TxD
SCK0
Input/output
3-wire serial interface serial clock input/output
Input
P20/ASCK
ASCK
Input
Asynchronous serial interface serial clock input
Input
P20/SCK0
RxD
Input
Asynchronous serial interface serial data input
Input
P22/SI0
TxD
Output
Asynchronous serial interface serial data output
Input
P21/SO0
TO2
Output
16-bit timer (TM20) output
Input
P51
CPT2
Input
16-bit timer capture edge input
Input
P32/INTP2
TI0
Input
External count clock input to 8-bit timer (TM00)
Input
P50/TO0
TO0
Output
8-bit timer (TM00) output
Input
P50/TI0
X1
Input
−
−
X2
−
System clock oscillation crystal connection
−
−
RESET
Input
System reset input
Input
−
NC
−
Not connected internally. Connect this pin directly to the V
SS
pin
(it can also be left open).
−
−
V
DD0
−
Positive power supply for ports
−
−
V
DD1
−
Positive power supply (except for ports)
−
−
V
SS0
−
Ground potential for ports
−
−
V
SS1
−
Ground potential (except for ports)
−
−
IC
−
Internally connected. Connect this pin directly to the V
SS0
or V
SS1
pin.
−
−
V
PP
−
Flash memory programming mode setting.
Apply high voltage during program write/verify. Connect this pin
directly to the V
SS
pin in normal operating mode.
−
−
Содержание mPD789026 Subseries
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