Preliminary document
Specifications in this document are tentative and subject to change.
Under development
R8C/34W Group, R8C/34X Group, R8C/34Y Group, R8C/34Z Group
1. Overview
1.5
Pin Functions
Tables 1.15 and 1.16 list Pin Functions.
Table 1.15
Pin Functions (1)
Item
Pin Name
I/O Type
Description
Power supply input VCC, VSS
−
−
Apply 2.7 V 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
I
Input “L” on this pin resets the MCU.
Connect this pin to VCC via a resistor.
RESET
MODE
XIN
MODE
I
I
XIN clock input
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
INT interrupt input INT0 to INT4
I
I
INT interrupt input pins.
Key input interrupt
Timer RA
Key input interrupt input pins
KI0 to KI3
TRAIO
I/O
O
O
I
Timer RA I/O pin
TRAO
Timer RA output pin
Timer RB output pin
External clock input pin
External trigger input pin
Timer RC I/O pins
Timer RB
Timer RC
TRBO
TRCCLK
TRCTRG
I
TRCIOA, TRCIOB,
TRCIOC, TRCIOD
I/O
Timer RD
TRDIOA0, TRDIOA1,
TRDIOB0, TRDIOB1,
TRDIOC0, TRDIOC1,
TRDIOD0, TRDIOD1
I/O
Timer RD I/O pins
TRDCLK
I
O
I/O
I
External clock input pin
Divided clock output pin
Transfer clock I/O pins
Serial data input pins
Timer RE
TREO
Serial interface
CLK0, CLK2
RXD0, RXD2
TXD0, TXD2
O
I
Serial data output pins
Transmission control input pin
CTS2
O
Reception control output pin
RTS2
SCL2
SDA2
SSI
I2C mode clock I/O pin
I2C mode data I/O pin
Data I/O pin
I/O
I/O
I/O
I/O
SSU
Chip-select signal I/O pin
SCS
SSCK
SSO
I/O
I/O
Clock I/O pin
Data I/O pin
I: Input
Note:
O: Output
I/O: Input and output
1. Refer to the oscillator manufacturer for oscillation characteristics.
REJ03B0312-0010 Rev.0.10
Apr 09, 2010
Page 18 of 67
RENESAS [ RENESAS TECHNOLOGY CORP ]
