M16C62_M Datasheet, PDF (564/615 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

External ROM
Mitsubishi microcomputers
M16C / 62A Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
5.2 Pin Description
Tables 5.2.1 and 5.2.2 show the pin description.
Table 5.2.1. Pin Description (1)
Pin name Signal name I/O type
VCC, VSS
Power supply
input
CNVSS
CNVSS
Input
Function
Supply 2.7 to 5.5 V to the VCC pin. Supply 0 V to the VSS pin.
Connect this pin to VCC.
RESET
XIN
XOUT
BYTE
AVCC
AVSS
Reset input
Clock input
Clock output
Input
Input
Output
External data Input
bus width
select input
Analog power
supply input
Analog power
supply input
A “L” on this input resets the microcomputer.
These pins are provided for the main clock generating circuit. Connect
a ceramic resonator or crystal between the XIN and the XOUT pins. To
use an externally derived clock, input it to the XIN pin and leave the
XOUT pin open.
This pin selects the width of an external data bus. A 16-bit width is
selected when this input is “L”; an 8-bit width is selected when this
input is “H”. This input must be fixed to either “H” or “L”.
This pin is a power supply input for the A-D converter. Connect this
pin to VCC.
This pin is a power supply input for the A-D converter. Connect this
pin to VSS.
VREF
Reference
Input
voltage input
This pin is a reference voltage input for the A-D converter.
D0 to D7
Data bus
Input/output When set as a separate bus, these pins input and output data (D0–D7).
P10 to P17
D8 to D15
I/O port P1
Data bus
Input/output This is an 8-bit CMOS I/O port. It has an input/output port direction
register that allows the user to set each pin for input or output
individually.
Input/output When set as a separate bus, these pins input and output data (D8–D15).
A0 to A7
A0/D0 to
A7/D7
Address bus
Address bus/
data bus
Output
These pins output 8 low-order address bits (A0–A7).
Input/output If the external bus is set as an 8-bit wide multiplexed bus, these pins
input and output data (D0–D7) and output 8 low-order address bits
(A0–A7) separated in time by multiplexing.
A0,
A1/D0 to
A7/D6
Output
If the external bus is set as a 16-bit wide multiplexed bus, these pins
Input/output input and output data (D0–D6) and output address (A1–A7) separated
in time by multiplexing. They also output address (A0).
A8 to A15
Address bus Output
These pins output 8 middle-order address bits (A8–A15).
A8/D7,
A9 to A15
P40 to P47
Address bus/
data bus
I/O port P4
Input/output If the external bus is set as a 16-bit wide multiplexed bus, these pins
Output
input and output data (D7) and output address (A8) separated in time
by multiplexing. They also output address (A9–A15).
Input/output This is an 8-bit I/O port equivalent to P1.
CS0 to CS3,
A16 to A19
Output
Output
These pins output CS0–CS3 signals and A16–A19. CS0–CS3 are chip
select signals used to specify an access space. A16–A19 are 4 high-
order address bits.
2-247