R8C/13 Group
1. Overview
1.6 Pin Description
Table 1.3 shows the pin description
Table 1.3 Pin description
Signal name
Power supply
input
Pin name
Vcc,
Vss
I/O type
Function
I
Apply 2.7 V to 5.5 V to the Vcc pin. Apply 0 V to the
Vss pin.
IVcc
IVcc
O
This pin is to stabilize internal power supply.
Connect this pin to Vss via a capacitor (0.1 µF).
Do not connect to Vcc.
Analog power
supply input
AVcc, AVss
I
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.
___________
Reset input
CNVss
MODE
RESET
CNVss
MODE
I
I
I
I
Input “L” on this pin resets the MCU.
Connect this pin to Vss via a resistor.(1)
Connect this pin to Vcc via a resistor.
Main clock input XIN
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
Main clock output XOUT
O
leave the XOUT pin open.
_____
_______
_______
______
INT interrupt input INT0 to INT3
Key input interrupt KI0 to KI3
input
I
I
INT interrupt input pins.
Key input interrupt pins.
_____
_____
Timer X
CNTR0
CNTR0
CNTR1
TZOUT
I/O
O
I/O
O
I
O
Timer X I/O pin
Timer X output pin
Timer Y I/O pin
Timer Z output pin
Timer C input pin
The timer C output pins
__________
Timer Y
Timer Z
Timer C
TCIN
CMP00 to CMP02,
CMP10 to CMP12
CLK0
RxD0, RxD1
TxD0, TxD10,
TxD11
Serial interface
I/O
I
O
Transfer clock I/O pin.
Serial data input pins.
Serial data output pins.
Reference voltage VREF
input
I
Reference voltage input pin for A/D converter. Con-
nect the VREF pin to Vcc.
A/D converter
I/O port
AN0 to AN11
I
Analog input pins for A/D converter
P00 to P07,
P10 to P17,
P30 to P33, P37,
P45
I/O
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.
Input port
NOTES :
P46, P47
I
Port for input-only
1. Refer to "19.8 Noise" for the connecting reference resistor value.
Rev.1.20 Jan 27, 2006 page 6 of 205
REJ09B0111-0120
RENESAS [ RENESAS TECHNOLOGY CORP ]
