R8C/2H Group, R8C/2J Group
1. Overview
Rev.0.10
REJ03B0217-0010
Jul 20, 2007
Page 12 of 65
Under development
Preliminary specification
Specications in this manual are tentative and subject to change
1.5
Pin Functions
Table 1.7 Pin Functions of R8C/2H Group and Table 1.8 Pin Functions of R8C/2J Group.
I: Input
NOTE:
O: Output
I/O: Input and output
1. Refer to the oscillator manufacturer for oscillation characteristics.
Table 1.7
Pin Functions of R8C/2H Group
Type
Symbol
I/O Type
–
I
I
I
Description
Power supply input
Reset input
MODE
XCIN clock input
VCC, VSS
RESET
MODE
XCIN
Apply 2.2 V to 5.5 V to the VCC pin. Apply 0 V to the VSS pin.
Input “L” on this pin resets the MCU.
Connect this pin to VCC via a resistor.
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
Key input interrupt
INT0, INT1
I
I
INT interrupt input pins
Key input interrupt input pins
KI0 to KI3
TRAIO
TRAO
TRBO
TRFI
TRFO00 to TRFO02,
TRFO10 to TRFO11
CLK0, CLK2
RXD0, RXD2
TXD0, TXD2
VCMP1, VCMP2
CVREF
VCOUT1, VCOUT2
P1_0 to P1_7,
P3_3, P3_7,
P4_3 to P4_5,
P6_3 to P6_5
Timer RA
I/O
O
O
I
O
Timer RA I/O pin
Timer RA output pin
Timer RB output pin
Timer RF input pin
Timer RF output pins
Timer RB
Timer RF
Serial interface
I/O
I
O
I
I
O
I/O
Clock I/O pin
Serial data input pin
Serial data output pin
Analog input pins to comparator
Reference voltage input pin to comparator
Comparator output pins
CMOS I/O ports. Each port has an I/O select direction
register, allowing each pin in the port to be directed for input
or output individually.
Any port set to input can be set to use a pull-up resistor or not
by a program.
Comparator
I/O port