
R8C/36T-A Group
1. Overview
Under development Preliminary document
Specifications in this document are tentative and subject to change.
R01UH0240EJ0010 Rev.0.10
Page 10 of 728
Aug 05, 2011
1.5
Pin Functions
Note:
1. Contact the oscillator manufacturer for oscillation characteristics.
Table 1.7
Pin Functions (1)
Item
Pin Name
I/O
Description
Power supply input
VCC, VSS
—
Apply 1.8 V through 5.5 V to the VCC pin.
Apply 0 V to the VSS pin.
Analog power supply
input
AVCC, AVSS
—
Power supply input for the A/D converter.
Connect a capacitor between pins AVCC and AVSS.
Reset input
RESET
I
Applying a low level to this pin resets the MCU.
MODE
I
Connect this pin to the VCC pin via a resistor.
XIN clock input
XIN
I
I/O for the XIN clock generation circuit.
Connect a ceramic resonator or a crystal oscillator
between pins XIN and XOUT.
(1)To use an external clock, input it to the XIN pin and
leave the XOUT pin open.
XIN clock output
XOUT
I/O
XCIN clock input
XCIN
I
I/O for the XCIN clock generation circuit.
Connect a crystal oscillator between pins XCIN and
To use an external clock, input it to the XCOUT pin and
leave the XCIN pin open.
XCIN clock output
XCOUT
I/O
INT interrupt input
INT0 to INT4
I
INT interrupt input.
Key input interrupt
KI0 to KI3
I
Key input interrupt input.
Timer RJ_0
TRJIO_0
I/O
Input/output for timer RJ.
TRJO_0
O
Output for timer RJ.
Timer RB2_0
TRBO_0
O
Output for timer RB2.
Timer RC_0
TRCCLK_0
I
External clock input.
TRCTRG_0
I
External trigger input.
TRCIOA_0, TRCIOB_0,
TRCIOC_0, TRCIOD_0
I/O
Input/output for timer RC.
Timer RE2
TMRE2O
O
Divided clock output.
Serial interface
(UART0)
CLK_0, CLK_1
I/O
Transfer clock input/output.
RXD_0, RXD_1
I
Serial data input.
TXD_0, TXD_1
O
Serial data output.
Serial interface
(UART2)
CTS2
I
Input for transmission control.
RTS2
O
Output for reception control.
SCL2
I/O
I2C mode clock input/output.
SDA2
I/O
I2C mode data input/output.
RXD2
I
Serial data input.
TXD2
O
Serial data output.
CLK2
I/O
Transfer clock input/output.
Synchronous serial
communication unit
(SSU_0)
SSI_0
I/O
Data input/output.
SCS_0
I/O
Chip-select input/output.
SSCK_0
I/O
Clock input/output.
SSO_0
I/O
Data input/output.
I2C bus (I2C_0)
SCL_0
I/O
Clock input/output.
SDA_0
I/O
Data input/output.
Reference voltage
input
VREF
I
Reference voltage input for the A/D converter.