M32C82_15 Datasheet, PDF (18/84 Pages) Renesas Technology Corp – SINGLE-CHIP 16/32-BIT CMOS MICROCOMPUTER

M32C/82 Group
1. Overview
1.6 Pin Description
Table 1.6 Pin Description (100-Pin and 144-Pin Packages)
Symbol
Function I/O type
Description
VCC
Power supply input I Apply 3.0 to 5.5 V to the VCC pins.
VSS
I Apply 0 V to the VSS pin.
CNVSS
CNVSS
I Switches processor mode. Connect this pin to VSS to start up in single-chip
mode (memory expansion mode). Connect this pin to VCC to start up in
____________
RESET
Reset input
microprocessor mode.
___________
I The microcomputer is in a reset state when applying "L" to the RESET pin.
XIN
Clock input
I I/O pins for the main clock oscillation circuit. Connect a ceramic resonator or
XOUT
Clock output
O crystal oscillator between XIN and XOUT. To use an external clock, input the
clock to XIN and leave XOUT open.
BYTE
Input to switch
I Switches the data bus in external memory space 3. The data bus is 16 bits wide
external data bus
when the BYTE pin is held "L" and 8 bits wide when the BYTE pin is held "H".
width
Set to either. Connect this pin to VSS when an external bus is not used.
AVCC
Analog power
I Applies power supply for the A/D converter and D/A converter. Connect this
supply input
pin to VCC.
AVSS
Analog power
I Applies power supply for the A/D converter and D/A converter. Connect this
supply input
pin to VSS.
VREF
Reference voltage
I Applies reference voltage for the A/D converter.
input
P00 to P07
I/O port P0
I/O 8-bit I/O ports in CMOS having a direction register to select input or output.
Each pin is set as an input port or output port. An input port in single-chip
mode can be set for a pull-up or for no pull-up in 4-bit unit by program. When
these pins are used as bus control pins in memory expansion mode and
microprocessor mode, internal pull-up resistor cannot be selected. Ports used
as input ports can be set for a pull-up or for no pull-up in the modes above.
D0 to D7
Data bus
I/O Inputs and outputs data (D0 to D7) when these pins are set as the separate bus.
AN00 to AN07 Analog input pin
I Analog input pins for the A/D converter
P10 to P17
________ ________
INT3 to INT5
I/O port P1
______
INT interrupt input
I/O 8-bit I/O ports having equivalent functions to P0
______
I Input pins for the INT interrupt
pin
D8 to D15
Data bus
I/O Inputs and outputs data (D8 to D15) when these pins are set as the separate bus.
P20 to P27
I/O port P2
I/O 8-bit I/O ports having equivalent functions to P0
A0 to A7
Address bus
O Outputs 8 low-order address bits (A0 to A7).
A0/D0 to
Address bus/data I/O Inputs and outputs data (D0 to D7) and outputs 8 low-order address bits (A0 to
A7/D7
bus
A7) by time-sharing when these pins are set as the multiplexed bus.
AN20 to AN27 Analog input pin
I Analog input pins for A/D converter
P30 to P37
I/O port P3
I/O 8-bit I/O ports having equivalent functions to P0
A8 to A15
Address bus
O Outputs 8 middle-order address bits (A8 to A15).
A8/D8 to
Address bus/data I/O Inputs and outputs data (D8 to D15) and outputs 8 middle-order address bits
A15/D15
bus
(A8 to A15) by time-sharing when external 16-bit data bus is set as the multi-
plexed bus.
MA0 to MA7 Address bus
O Outputs row addresses and column addresses by time-sharing when accessing
the DRAM area.
I : Input O : Output I/O : Input and output
Rev.1.20 Jun. 01, 2004 page 16 of 80