M37221 Mitsubishi, M37221 Datasheet - Page 4

• Manufacturer Part Number: M37221
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
• Manufacturer: Mitsubishi

PIN DESCRIPTION
4
V
V
CNV
______
RESET
X
X
P0
P0
P0
A-D4
P0
P1
P1
P1
P1
P1
P1
INT3,
P1
P1
P2
P2
P2
P2
P2
P2
P3
DA1,
P3
DA2,
P3
P3
P3
CC
SS.
IN
OUT
0
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
0
1
2
3
4
/PWM0–
/PWM5,
/INT2/
/INT1
/OUT2,
/SCL1,
/SCL2,
/SDA1,
/SDA2,
/A-D1/
/A-D2,
/A-D3
/S
/S
/S
/TIM3,
/TIM2,
–P2
/A-D5/
/A-D6/
/OSC1,
/OSC2
,
,
Pin
SS
CLK
OUT
IN
,
7
,
,
Power source
CNV
Reset input
Clock input
Clock output
I/O port P0
PWM output
External interrupt
input
Analog input
I/O port P1
CRT output
Multi-master
I
Analog input
External interrupt
input
I/O port P2
External clock input
Serial I/O synchro-
nizing clock input/
output
Serial I/O data
input/output
I/O port P3
Analog input
D-A conversion
output
Input port P3
Clock input for
CRT display
Clock output for
CRT display
2
C-BUS interface
SS
Name
Output
Output
Output
Output
Output
Output
Input/
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
I/O
I/O
I/O
I/O
I/O
I/O
I/O
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
Apply voltage of 5 V ± 10 % (typical) to V
This is connected to V
To enter the reset state, the reset input pin must be kept at a “L” for 2 s or more (under
normal V
If more time is needed for the quartz-crystal oscillator to stabilize, this “L” condition should
be maintained for the required time.
This chip has an internal clock generating circuit. To control generating frequency, an
external ceramic resonator or a quartz-crystal oscillator is connected between pins X
X
the X
Port P0 is an 8-bit I/O port with direction register allowing each I/O bit to be individually
programmed as input or output. At reset, this port is set to input mode. The output structure
is N-channel open-drain output. The note out of this Table gives a full of port P0 function.
Pins P0
structure is N-channel open-drain output.
Pins P0
P0
Port P1 is an 8-bit I/O port and has basically the same functions as port P0. The output
structure is CMOS output.
Pins P1
Pins P1
I
Pins P1
P1
Port P2 is an 8-bit I/O port and has basically the same functions as port P0. The output
structure is CMOS output.
Pins P2
P2
structure is N-channel open-drain output.
Pins P2
The output structure is N-channel open-drain output.
Ports P3
CMOS output or N-channel open-drain output structure can be selected as the port P3
and P3
Pins P3
Pins P3
Ports P3
P3
P3
output.
2
OUT
C-BUS interface is used. The output structure is N-channel open-drain output.
4
6
5
0
3
pin is also used as CRT display clock output pin OSC2. The output structure is CMOS
pin is also used as analog input pin A-D4.
pin is also used as external interrupt input pin INT3.
pin is also used as serial I/O synchronizing clock input/output pin S
pin is also used as CRT display clock input pin OSC1.
. If an external clock is used, the clock source should be connected to the X
OUT
1
0
6
0
1
5
3
0
0
1
. The output structure of port P3
0
–P0
–P1
–P1
, P2
, P3
, P3
3
CC
, P2
, P0
is also used as CRT output pin OUT2. The output structure is CMOS output.
pin should be left open.
–P3
, P3
conditions).
4
5
7
4
1
1
2
7
2
4
are used as SCL1, SCL2, SDA1 and SDA2 respectively, when multi-master
are also used as PWM output pins PWM0–PWM5 respectively. The output
are also used as analog input pins A-D1 to A-D3 respectively.
are also used as external clock input pins TIM3, TIM2 respectively.
are also used as analog input pins A-D5, A-D6 respectively.
are also used as D-A conversion output pins DA1, DA2 respectively.
are also used as serial I/O data input/output pins S
are also used as external interrupt input pins INT2, INT1 respectively.
are a 3-bit I/O port and has basically the same functions as port P0. Either
are a 2-bit input port.
SS
M37221EF-XXXSP,M37221EFSP
.
with ON-SCREEN DISPLAY CONTROLLER
Functions
2
CC
is N-channel open-drain output.
, and 0 V to V
MITSUBISHI MICROCOMPUTERS
SS
.
OUT
, S
CLK
IN
respectively.
. The output
IN
pin and
IN
and
0