Pin Description
Unde
deeopmen
Preliminary Specifications REV.E
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30220 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
6
Pin Description
V
CC
, V
SS
CNV
SS
X
CIN
X
COUT
AV
CC
AV
SS
V
REF
P0
0
to P0
7
P1
0
to P1
7
P3
0
to P3
5
P4
0
to P4
7
Signal name
Power supply
input
CNV
SS
Reset input
Clock input
Clock output
Analog power
supply input
Reference
voltage input
I/O port P0
I/O port P1
I/O port P3
I/O port P4
Supply 2.7 to 5.5 V to the V
CC
pin. Supply 0 V to the V
SS
pin.
Function
Connect it to the V
SS
pin.
A “L” on this input resets the microcomputer.
This pin is a power supply input for the A-D converter. Connect
it to V
CC
.
This pin is a power supply input for the A-D converter. Connect
it to V
SS
.
This pin is a reference voltage input for the A-D converter.
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. When set for input, the user can specify in
units of four bits via software whether or not they are tied to a
pull-up resistor. Pins in this port also use as LCD segment
output and real time port output.
This is an 8-bit I/O port equivalent to P0. Pins in this port also
function as input pins for the key input interrupt function and real
time port output.
This is a 6-bit I/O port equivalent to P0. P3
0
to P3
3
also function
as input pins for the key input interrupt function.
Pin name
I/O
Analog power
supply input
RESET
I/O port P5
I/O port P6
P5
0
to P5
7
P6
0
to P6
7
This is an 8-bit I/O port equivalent to P0. Pins in this port also
function as UART0 and UART1 I/O pins as selected by
software.
P2
0
to P2
7
I/O port P2
This is an 8-bit I/O port equivalent to P0. Pins in this port also
function as input pins for the key input interrupt function and real
time port output.
I
I
I
O
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
This is a 8-bit I/O port equivalent to P0. Pins in this port also
function as timer B0 to B5 and INT
3
input pins, CK
OUT
output
pin as selected by software.
This is a 8-bit I/O port equivalent to P0. Pins in this port also
function as timer A0 to A3 I/O pins, INT
4
input pin as selected
by software.
These pins are provided for the sub clock generating circuit.
Connect a ceramic resonator or crystal between the X
CIN
and the
X
COUT
pins. To use an externally derived clock, input it to the
X
CIN
pin and leave the X
COUT
pin open.
X
IN
X
OUT
Clock input
Clock output
I
O
These pins are provided for the main clock generating circuit.
Connect a ceramic resonator or crystal between the X
IN
and the
X
OUT
pins. To use an externally derived clock, input it to the X
IN
pin and leave the X
OUT
pin open.