Datasheet

M32C/8B Group 1. Overview
REJ03B0242-0100 Rev.1.00 Nov 01, 2009
Page 16 of 67
Table 1.12 Pin Functions (100-Pin and 144-Pin Packages) (2/3)
Item Pin Name
I/O
Type
Supply
Voltage
Description
Main clock
input
XIN I VCC1 Input/output pins for the main clock oscillation circuit. Connect a
ceramic resonator or crystal oscillator between XIN and XOUT. To
apply an external clock, apply it to XIN and leave XOUT open.
Main clock
output
XOUT O VCC1
Sub clock
input
XCIN I VCC1 Input/output pins for the sub clock oscillation circuit. Connect a
crystal oscillator between XCIN and XCOUT. To apply an external
clock, apply it to XCIN and leave XCOUT open.
Sub clock
output
XCOUT O VCC1
BCLK output BCLK O VCC2 Bus clock output pin
Clock output CLKOUT O VCC2 The CLKOUT pin outputs the clock having the same frequency as
fC, f8, or f32
INT
interrupt
input
INT0 to INT2
I VCC1
INT
interrupt input pins
NT3
to INT5
I VCC2
NMI
interrupt
input
NMI
I VCC1
NMI interrupt input pin. Connect the NMI pin to VCC1 via a resistor
when the NMI interrupt is not used.
Timer A TA0OUT to
TA4OUT
I/O VCC1 Timer A0 to A4 input/output pins
(TA0OUT is N-channel open drain output)
TA0IN to
TA4IN
I VCC1 Timer A0 to A4 input pins
Timer B TB0IN to
TB5IN
I VCC1 Timer B0 to B5 input pins
Three-phase
motor control
timer output
U, U
, V, V,
W, W
O VCC1 Three-phase motor control timer output pins
Serial
interface
CTS0
to
CTS4
I VCC1 Input pins to control data transmission
RTS0
to
RTS4
O VCC1 Output pins to control data reception
CLK0 to CLK4 I/O VCC1 Serial clock input/output pins
RXD0 to
RXD4
I VCC1 Serial data input pins
TXD0 to
TXD4
O VCC1 Serial data output pins
(TXD2
is N-channel open drain output )
I
2
C mode SDA0 to
SDA4
I/O VCC1 Serial data input/output pins
(SDA2
is N-channel open drain output )
SCL0 to SCL4 I/O VCC1 Serial clock input/output pins
(SCL2
is N-channel open drain output )
Serial
interface
special function
STXD0 to
STXD4
O VCC1 Serial data output pins when slave mode is selected
(STXD2 is N-channel open drain output )
SRXD0 to
SRXD4
I VCC1 Serial data input pins when slave mode is selected
SS0
to SS4
I VCC1 Control input pins used in the serial interface special mode.