Rev.1.60 Jan 27, 2006 page 6 of 25
REJ03B0035-0160
R8C/10 Group
1. Overview
Signal name Pin name I/O type
Power supply Vcc, I
input Vss
IVcc IVcc O
Analog power AVcc, I
supply input AVss
Reset input
___________
RESET I
CNVss CNVss I
MODE MODE I
Main clock input XIN I
Main clock output XOUT O
_____
INT interrupt input
_______ _______
INT0 to INT3 I
Key input interrupt
_____ _____
KI0 to KI3 I
Timer X CNTR0 I/O
____________
CNTR0 O
Timer Y CNTR1 I/O
Timer Z TZOUT O
Timer C TCIN I
Serial interface CLK0 I/O
RxD0, RxD1 I
TxD0, TxD10,O
TxD11
Reference voltage VREF I
input
A/D converter AN0 to AN7 I
I/O port P00 to P07, I/O
P10 to P17,
P30 to P33, P37,
P45
Input port P46, P47 I
Function
Apply 2.7 V to 5.5 V to the Vcc pin. Apply 0 V to the
Vss pin.
This pin is to stabilize internal power supply.
Connect this pin to Vss via a capacitor (0.1 µF).
Do not connect to Vcc.
Power supply input pins for A/D converter. Connect the
AVcc pin to Vcc. Connect the AVss pin to Vss. Connect a
capacitor between pins AVcc and AVss.
Input “L” on this pin resets the MCU.
Connect this pin to Vss via a resistor.
Connect this pin to Vcc via a resistor.
These pins are provided for the main clock generat-
ing circuit I/O. Connect a ceramic resonator or a crys-
tal oscillator between the XIN and XOUT pins. To use
an externally derived clock, input it to the XIN pin and
leave the XOUT pin open.
______
INT interrupt input pins.
Key input interrupt pins.
Timer X I/O pin
Timer X output pin
Timer Y I/O pin
Timer Z output pin
Timer C input pin
Transfer clock I/O pin.
Serial data input pins.
Serial data output pins.
Reference voltage input pin for A/D converter. Con-
nect the VREF pin to Vcc.
Analog input pins for A/D converter
These are 8-bit CMOS I/O ports. Each port has an I/O
select direction register, allowing each pin in that port
to be directed for input or output individually.
Any port set to input can select whether to use a pull-
up resistor or not by program.
P10 to P17 also function as LED drive ports.
Port for input-only.
1.6 Pin Description
Table 1.3 shows the pin description
Table 1.3 Pin description
