R32C161 Datasheet, PDF (10/108 Pages) Renesas Technology Corp – RENESAS MCU

R32C/161 Group
1. Overview
1.5 Pin Definitions and Functions
Table 1.6 and Table 1.7 shows the pin definitions and functions.
Table 1.6 Pin Definitions and Functions (1/2)
Function
Symbol
I/O
Description
Power supply VCC, VSS
I Applicable as follows: VCC = 3.0 to 5.5 V, VSS = 0 V
Connecting pins
for decoupling
capacitor
VDC0, VDC1
A decoupling capacitor for internal voltage should be
— connected between VDC0 and VDC1
Analog power
supply
Reset input
AVCC, AVSS
RESET
I
Power supply for the A/D converter. AVSS should be
connected to VSS
I The MCU is reset when this pin is driven low
CNVSS
CNVSS
I This pin should be connected to VSS via a resistor
Debug port
NSD
I/O
This pin is to communicate with a debugger. It should
be connected to VCC via a resistor of 1 to 4.7 kΩ
Main clock input XIN
Main clock output XOUT
I
Input/output for the main clock oscillator. A crystal, or
a ceramic resonator should be connected between
pins XIN and XOUT. An external clock should be
O _{input at the XIN while leaving the XOUT open}
Sub clock input XCIN
Sub clock output XCOUT
I
Input/output for the sub clock oscillator. A crystal
oscillator should be connected between pins XCIN
and XCOUT. An external clock should be input at the
O _{XCIN while leaving the XCOUT open}
Clock output
CLKOUT
External interrupt INT0 to INT5
input
NMI input
P8_5/NMI
O
Output of the clock with the same frequency as fC,
f8, or f32
I ^{Input for external interrupts}
I Input for NMI
I/O ports
P0_0 to P0_7
P1_0 to P1_7
P2_0 to P2_7
P3_0 to P3_7
P4_0 to P4_7
P5_0 to P5_7
P6_5, P6_7
P7_0, P7_4 to P7_6
P8_2 to P8_4
P8_6, P8_7
P9_3 to P9_7
I/O ports in CMOS. Each port can be programmed to
input or output under the control of the direction
register.
Pull-up resistors are selected for following 4-pin
units, but are enabled only for the input pins: Pi_0 to
I/O Pi_3 and Pi_4 to Pi_7 (i = 0 to 9)
Input port
P9_1
I
Input port in CMOS. Pull-up resistors are selectable
for P9_1 and P9_3
REJ03B0241-0101 Rev.1.01 Dec 07, 2009
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