Datasheet

R8C/36C Group 1. Overview
R01DS0018EJ0110 Rev.1.10 Page 11 of 59
Nov 02, 2010
1.5 Pin Functions
Tables 1.7 and 1.8 list Pin Functions.
I: Input O: Output I/O: Input and output
Note:
1. Refer to the oscillator manufacturer for oscillation characteristics.
Table 1.7 Pin Functions (1)
Item Pin Name I/O Type Description
Power supply input VCC, VSS
—
Apply 1.8 to 5.5 V to the VCC pin.
Apply 0 V to the VSS pin.
Analog power
supply input
AVCC, AVSS
—
Power supply for the A/D converter.
Connect a capacitor between AVCC and AVSS.
Reset input
RESET
I
Input “L” on this pin resets the MCU.
MODE MODE I Connect this pin to VCC via a resistor.
XIN clock input XIN I These pins are provided for XIN clock generation circuit I/O.
Connect a ceramic resonator or a crystal oscillator between
the XIN and XOUT pins.
(1)
To use an external clock, input it to the XOUT pin and leave
the XIN pin open.
XIN clock output XOUT
I/O
XCIN clock input XCIN I These pins are provided for XCIN clock generation circuit I/O.
Connect a crystal oscillator between the XCIN and XCOUT
pins.
(1)
To use an external clock, input it to the XCIN pin and leave
the XCOUT pin open.
XCIN clock output XCOUT
O
INT
interrupt input INT0 to INT4
I
INT
interrupt input pins.
Key input interrupt
KI0
to KI3
I
Key input interrupt input pins.
Timer RA TRAIO I/O Timer RA I/O pin.
TRAO O Timer RA output pin.
Timer RB TRBO O Timer RB output pin.
Timer RC TRCCLK I External clock input pin.
TRCTRG I External trigger input pin.
TRCIOA, TRCIOB,
TRCIOC, TRCIOD
I/O
Timer RC I/O pins.
Timer RD TRDIOA0, TRDIOA1,
TRDIOB0, TRDIOB1,
TRDIOC0, TRDIOC1,
TRDIOD0, TRDIOD1
I/O
Timer RD I/O pins.
TRDCLK I External clock input pin.
Timer RE TREO O Divided clock output pin.
Timer RF TRFO00, TRFO10,
TRFO01,TRFO11,
TRFO02,TRFO12
O
Timer RF output pins.
TRFI I Timer RF input pin.
Timer RG TRGIOA, TRGIOB I/O Timer RG I/O ports.
TRGCLKA, TRGCLKB I External clock input pins.
Serial interface CLK0, CLK1, CLK2 I/O Transfer clock I/O pins.
RXD0, RXD1, RXD2 I Serial data input pins.
TXD0, TXD1, TXD2 O Serial data output pins.
CTS2
I
Transmission control input pin.
RTS2
O
Reception control output pin.
SCL2
I/O
I
2
C mode clock I/O pin.
SDA2
I/O
I
2
C mode data I/O pin.