Panasonic MN101C00 User Manual page 24

Chapter 1 Overview
Pin No. Name Type
20 TXD Output
21 RXD Input
20 SBO0 Output
21 SBI0 Input
22 SBT0 I/O
22 Buzzer I/O
24 RMOUT I/O
26 to 28 TM2IO to I/O
TM4IO
10
Pins
Table 1-3-1 Pin Function Summary (3/4)
Dual Function Function
SBO0(P00) UART transmit
data output pin
SBI0(P01) UART receive
data input pin
TXD(P00) Serial interface
transmit data
output pin
Serial interface
RXD(P01)
receive data input
pin
P02 Serial interface
clock I/O pin
P06 Buzzer output
P10 Remote control transmit
signal output pin
P12 to P14 Timer I/O pins
Description
In the serial interface in UART mode, these pins are configured as
the receive data input pin and transmit data output pin.
A push-pull or n-channel open-drain configuration can be selected for
TXD by the SC0MD1 register.
Pull-up resistors can be selected by the P0PLU register. The TXD
and RXD pins are also allocated as P00 and P01 respectively. When
not used as serial/UART pins, these can be used as normal I/O pins.
Transmit data output pin for serial interfaces 0. The output
configuration, either CMOS push-pull or n-channel open-drain, and
pull-up resistors can be selected by the software. Set these pins to the
output mode by the P0DIR register.
SBO0 is allocated as P00. This may be used as normal I/O pin when
the serial interface is not used.
Receive data input pin for serial interfaces 0. Pull-up resistor can be
selected by the P0PLU register.
Set these pins to the input mode by the P0DIR register.
SBI0 is allocated as P01. This can be used as normal I/O pin when the
serial interface is not used.
Clock I/O pin for serial interface 0. The output configuration, either
CMOS push-pull or n-channel open-drain output, can be selected by
the software. The direction of SBT0 is selected by the P0DIR register
in accordance with the communication mode. Pull-up resistors can be
selected by the P0PLU register. SBT0 is allocated as P02. This can be
used as normal I/O pin when the serial interface is not used.
Piezoelectric buzzer driver pin. The driving frequency can be
selected in the range of fs/2 to fs/2 by the DLYCTR register. Select
output mode by the P0DIR register and select buzzer output by the
DLYCTR register. When not used for buzzer output, this pin can be
used as a normal I/O pin.
Output pin for remote control transmit signal with a carrier signal.
Can be used as a normal I/O pin when remote control is not used.
Event counter clock input pins, overflow pulse output pins and PWM
signal output pins for timer 2 to 4.
To use these pins as event clock inputs, configure them as inputs by
the P1DIR register. For overflow pulse and PWM output, configure
these pins as outputs by the P1DIR register. When the pins are used as
inputs, pull-up resistors can be specified by the P1PLU register. When
not used for timer I/O, these can be used as normal I/O pins.