Datasheet
R01DS0011EJ0101 Rev.1.01 Page 25 of 102
Oct 28, 2011
R8C/LA3A Group, R8C/LA5A Group, R8C/LA6A Group, R8C/LA8A Group 1. Overview
1.5 Pin Functions
Tables 1.18 and 1.19 list Pin Functions for R8C/LA5A Group, and Tables 1.20 and 1.21 list Pin Functions for R8C/
LA8A Group.
I: Input O: Output I/O: Input and output
Note:
1. Contact the oscillator manufacturer for oscillation characteristics.
Table 1.18 Pin Functions for R8C/LA5A Group (1)
Item Pin Name I/O Type Description
Power supply input VCC, VSS — Apply 1.8 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
RESET
I Driving this pin low resets the MCU.
MODE MODE I Connect this pin to VCC via a resistor.
Power-off 0 mode
exit input
WKUP0
I This pin is provided for input to exit the mode used in power-off
0 mode. Connect to VSS when not using power-off 0 mode.
WKUP1
I This pin is provided for input to exit the mode used in power-off
0 mode.
XIN clock input XIN I These pins are provided for XIN clock generation circuit I/O.
Connect a ceramic oscillator or a crystal oscillator between pins
XIN and XOUT.
(1)
To use an external clock, input it to the XIN
pin and set XOUT as the I/O port P9_1. When the pin is not
used, treat it as an unassigned pin and use the appropriate
handling.
XIN clock output XOUT O
XCIN clock input XCIN I These pins are provided for XCIN clock generation circuit I/O.
Connect a crystal oscillator between pins XCIN and XCOUT.
(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 INT3,
INT5, INT7
IINT interrupt input pins.
Key input interrupt
KI0
to KI7
I Key input interrupt input pins.
Timer RB TRB0O, TRB1O O Timer RB output pins.
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 RH TRHO O Timer RH output pin.
Timer RJ TRJ0IO, TRJ1IO I/O Timer RJ I/O pins.
Serial interface CLK0 I/O Transfer clock I/O pin.
RXD0 I Serial data input pin.
TXD0 O Serial data output pin.