18
Type
Symbol
I/O
Name and Function
14-bit PWM timer
(PWMX)
PWM0 to
PWM3
Output
PWMX timer output: PWM D/A pulse output pins.
Watchdog
timer (WDT)
WDTOVF
Output
Watchdog timer overflows: The counter overflows
signal output pin in watchdog timer mode.
BUZZ
Output
BUZZ output: Output pins for the pulse divided by the
watchdog timer.
Serial
communication
interface (SCI)/
Smart Card
interface
TxD4,
TxD3,
TxD2,
TxD1,
TxD0
Output
Transmit data (channel 0, 1, 2): Data output pins.
RxD4,
RxD3,
RxD2,
RxD1,
RxD0
Input
Receive data (channel 0, 1, 2): Data input pins.
SCK4,
SCK3,
SCK2,
SCK1
SCK0
I/O
Serial clock (channel 0, 1, 2): Clock I/O pins.
SCK0 output type is NMOS push-pull.
IrDA-equipped
SCI 1 channel
(SCI0)
IrTxD
IrRxD
Output/
Input
IrDA transmission data/receive data: Input/output pins
for the data encoded for the IrDA.
I
2
C bus interface
(IIC) (optional)
SCL0
SCL1
I/O
I
2
C clock input (channel 1, 0):
I
2
C clock input/output pins.
These functions have a bus driving function.
SCL0's output format is an NMOS open drain.
SDA0
SDA1
I/O
I
2
C data input/output (channel 1, 0):
I
2
C clock input/output pins.
These functions have a bus driving function.
SCL0's output format is an NMOS open drain.
A/D converter
AN15 to AN0 Input
Analog 15 to 0: Analog input pins.
ADTRG
Input
A/D conversion external trigger input: Pin for input of
an external trigger to start A/D conversion.
D/A converter
DA3 to DA0
Output
Analog output: Analog output pins for D/A converter.
A/D converter,
D/A converter
AVCC
Input
A/D converter and D/A converter power supply pin
When the A/D converter and D/A converter are not
used, this pin should be connected to the system
power supply (+5 V).